Klamath Basin Potato Variety Development Summary

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1 2014 Klamath Basin Potato Variety Development Summary Brian A. Charlton Asst. Professor Prepared December 2014 by: Nichole A. Baley Faculty Research Asst. Oregon State University Klamath Basin Res. & Ext. Center

2 Table of Contents Introduction 3 Acknowledgements 4 Contributors Weather Insect Trapping Results 8 10 Guide to Clone Designations 11 Single hill Screening Results Fresh Market Value Methods 14 Replicated Trial Cultural Information 15 Russet Potato Variety Development Trials Preliminary Yield Trial (PYT 2) 16 Statewide Trial Tri State Trial Red/Specialty Potato Variety Development Trials Preliminary Yield Trial (PYT 2) 32 Statewide Trial Tri State Chip Potato Variety Development Trial Preliminary Yield Trial (PYT 2) 42 Statewide Trial Regional Trial Chip Processing Results

3 Introduction Since its inception in 1985, the Tri State variety development program has primarily focused on the development of processing and dual purpose (process and fresh) russets. Recent breeding efforts have focused more on improving genetic resistance to various pests and diseases as a means of lowering production costs. During the past decade, Oregon has been the lead state in the release of eleven russet varieties. Although the development of russet varieties remains the primary focus, recent efforts have included red skinned and specialty type selections. Many of these selections offer unique skin and/or flesh color combinations along with enhanced nutritional qualities including elevated antioxidant and Vitamin C content. In total, more than 25 new varieties have been released by the Tri State variety development program since More recently Klamath Basin growers have identified the need for chipping potatoes suitable for export markets. Trials were initiated in 2008 and 2009, with funding from the Oregon Potato Commission, to identify acceptable chipping varieties using advanced selections and recently released varieties from the Tri State, Southwest, North central, and Eastern breeding programs. Screening for resistance to various species of nematodes and related diseases is being accomplished at several locations. The Klamath Basin Research and Extension Center (KBREC) routinely screens selections for resistance to root knot nematode (Meloidogyne chitwoodi and Meloidogyne hapla) and corky ringspot disease (CRS) resulting from infection of Tobacco rattle virus which is vectored by stubby root (Paratrichodorus spp.) nematodes. Other cooperating sites within the Tri State area also work on resistant screening and other production limitations most suited to their respective location. The overall objective is that future releases will offer genetic resistance to many economically important pests and diseases which will help reduce production inputs as these costs continue to rise. The Klamath Basin Research and Extension Center (KBREC) also serves as an initial field screening location for first generation selections of russet, specialty, and chipping clones (single hills). Secondyear evaluations of four hill red/specialty and chip selections also take place in Klamath; however, russet selections are currently sent to the Central Oregon Agricultural Research Center (COARC). Breeding progeny are supplied by programs at the USDA Agricultural Research Service (ARS) facility in Prosser, Washington, and Aberdeen, Idaho, as well as, Oregon State University (OSU), Colorado State University, and North Dakota State University. The purpose of this summary booklet is to report the results of our variety trial efforts. In 2009, KBREC participated in the following research trials: Russet Preliminary Yield 2 (PYT 2), Statewide Russet, Tristate Russet, Western Regional Russet, Red/Specialty PYT 1, Statewide Specialty, Tri state Specialty, Western Regional Red/Specialty, and a modified Western Regional Chip Trial. A brief summary of weather during the growing season, insect trapping results, single hill selections, and specialty 4 hill selections are also included in this research summary. 3

4 Acknowledgements The ultimate goal of variety development at OSU KBREC and cooperating Tri state partners is the development and commercialization of new potato varieties to benefit the Northwest potato industry. The effect of the Tri state Potato Variety Development Program on the Northwest potato industry has been substantial. The fresh market industry, French fry processors and chippers have incorporated many varieties developed through this program into their businesses. Ranger Russet, Western Russet, Umatilla Russet, and Alturas are examples of russet cultivars released from the Tri State program that have greatly benefited the Northwest potato industry, being the 3 rd, 5 th, 7 th, and 8 th most widely grown cultivars in Oregon and accounted for 27% of total acreage. As expected, recently released russet varieties have found greater adoption by Northwest processors compared to fresh market usage in the Klamath Basin. However, several varieties have found fresh market niches in the Klamath Basin including GemStar Russet, Premier Russet, and most recently Classic Russet. Varieties recently released by the Tri State program are now produced on over 140,000 acres in the Pacific Northwest with value to growers estimated at approximately $390 million. A recent economic analysis of the Tri state breeding effort revealed that every dollar invested in the program results in a $39 return (Araji and Love, 2002). The current focus of Tri state variety development efforts is to develop improved varieties that increase quality and production efficiency while decreasing fertilizer and pesticide inputs. The success of OSU KBREC potato variety development is made possible with funding from USDA CREES, USDA ARS, and the generous support of the Oregon Potato Commission. In addition, the Klamath Potato Growers Association annually contributes to OSU KBREC research and Extension activities. References Araji, A.A. and S. Love The economic impact of investment in the Pacific Northwest potato variety development program. Amer. J. Potato Res. 79: Special Acknowledgment OSU KBREC plagiarized the design and layout for this publication from the WSU Potato Cultivar Yield and Postharvest Quality Evaluation publication. This is an excellent publication which provides a vast amount of data in a grower friendly venue. The publication below, by the Washington State University Potato Research Group, can be found at the listed website. Mark Pavek, Rick Knowles, Zach Holden, Nora Fuller Washington State University Potato Research Group, Pullman, WA Potato Cultivar Yield and Postharvest Quality Evaluations. 4

5 Contributors Oregon Cooperators: Solomon Yilma, Corvallis, OR Vidyasagar Sathuvalli, Hermiston Agricultural Research & Extension Center, Hermiston, OR Clint Shock, Erik Feibert, Malheur Experiment Station, Ontario, OR Tri state Cooperators: Mark Pavek, Rick Knowles, Zach Holden, Nora Fuller, Washington State University, Pullman, WA Chuck Brown, USDA/ARS, Prosser, WA Jeff Stark, Peggy Bain, University of Idaho, Aberdeen, ID Mike Thornton, University of Idaho, Parma, ID Rich Novy, Jonathan Whitworth, Brian Schneider, USDA/ARS, Aberdeen, ID Regional Cooperators: David Holm, Farhettin Goktepe, Colorado State University, San Luis Valley, CO Creighton Miller, Douglas Schuering, Jeff Koym, Texas A&M University, Springlake, TX Rob Wilson, Darrin Culp, University of California, Tulelake, CA Industry Cooperators: Rebecca Jones, Allan French, J.R. Simplot Co. Baley Trotman Farms, Malin, OR Wong Potatoes, Klamath Falls, OR Ed Stastny, Malin, OR Roy Wright, Tulelake, CA Basin Fertilizer & Chemical, Merrill, OR Macy Flying Service, Newell, CA Commissions and Associations Bill Brewer, Jennifer Fletcher, Judy Schwartz, Oregon Potato Commission, Portland, OR Klamath Potato Growers Association, Klamath Falls, OR 5

6 Weather Data Yearly Average Minimum and Maximum Air Temperature Average Minimum Average Maximum Temperature (F)

7 Accumulated Water Year Precipitation 2013 Precipitation 2014 Precipitation Accumulated Water Year Precipitation (in)

8 360 Total P Day Accumulation P Days Average 260 May 15 June 1 June Insect Trapping Results Potato tuberworm was first detected in the Klamath Basin in late August of KBREC initiated an extensive trapping program the following year (2006) and have continued this effort annually. In 2009, we expanded our trapping efforts to include aphids, leafhoppers, and psyllids. Fifteen Delta traps (tuber moth), twelve yellow water pan traps (aphids), and fifteen sticky cards (leafhoppers and psyllids) were placed in growers fields shortly after crop emergence. Traps were checked weekly during the growing season and results were tabulated and made available to growers, crop consultants, and other industry personnel electronically in newsletter titled Potato Bytes. This newsletter was also published on the KBREC website at Collected data provided Basin producers with pertinent information to improve pest management strategies. Potato tuberworm has not been found despite an extensive eight year trapping program. The following graphs show population dynamic trends for aphids and leafhoppers throughout the growing season. 8

9 Average potato and green peach aphids per trap per day Population Dynamics of Potato Aphid, Green Peach Aphid and Other Aphids in Klamath County, OR Average other aphid per trap per day Potato Aphids Green Peach Aphids Other Aphids 0.25 Population Dynamics of Beet Leafhoppers in Klamath County, OR 2014 Average BLH per trap per day

10 Average OLH per day per trap Population Dynamics of Other Leafhoppers in Klamath County, OR

11 Guide to Clone Designation Example: AC RU AC RU Breeding Program (Aberdeen, ID) AC RU Selection Site (Colorado) AC RU Year of Cross (1999) AC RU Cross Number (375) AC RU Tuber Selection (1) AC RU Russet (Ru) Location Codes Designation Breeding Program Selection Program Other A Aberdeen, Idaho Aberdeen, Idaho AO Aberdeen, Idaho Oregon AOA Aberdeen, Idaho Oregon Aberdeen, Idaho ATX Aberdeen, Idaho Texas BTX Beltsville, Maryland Texas CO Colorado MWTX Madison, Wisconsin Texas NDA North Dakota Aberdeen, Idaho NY New York PA Prosser, Washington Aberdeen, Idaho POR Prosser, Washington Oregon TC Texas Colorado TE Tetonia, Idaho TXA Texas Aberdeen, Idaho TXNS Texas Norkotah Strain B LS P/P R R/R R/Y Ru W/Y LB PW/Y P/Y P/PW Miscellaneous Designations Chuck Brown s Cross Low Sugar Purple skin/purple flesh Red skin Red skin/red flesh Red skin/yellow flesh Russet White skin/yellow flesh Late Blight resistance Purple skin with White eyes/ Yellow flesh Purple skin/yellow flesh Purple skin/purple and White flesh 11

12 Single Hill Results Approximately, fifty five thousand (55,000) greenhouse produced seedling tubers were planted at a remote site in the Yonna Valley area on May 19, Located about 25 miles east of Klamath Falls, soils are very sandy with approximately 1.0 percent organic matter and a ph of 7.0. The location provides good isolation from other potato production areas and intensively fumigated soils allows us to harvest very clean material for seed increase. Progeny included 55 families from Oregon State University; 42 from USDA, Prosser, WA; 219 from USDA, Aberdeen, Idaho; 7 from Colorado State University. Several crosses included russet parents with virus, late blight and potato tuber worm resistance. Tuber families were lifted with a two row, level bed digger on October 9. A selection team including researchers, extension agents, growers and industry personnel selected desirable clones from various families immediately after lifting. As expected, selection was based primarily on external appearance; however, internal evaluation was performed on a limited number of selections. All retained material was transported to Klamath Falls, Oregon for storage at the Klamath Basin Research and Extension Center (KBREC). The following table outlines the number of single hills provided by each breeding program and selection rate. Location General Cross Types Number of Progeny Planted Number of Progeny Selected % Selection Rate ARS Prosser, WA Disease resistance, pigmented 8, Oregon State University Disease resistance, mixed type 11, Colorado State University Disease resistance, russet 2, ARS Aberdeen, ID Disease resistance, russet 34, Total 55,812 1,

13 Preliminary Yield (PYT 1) Russet Screening Four hundred eighty five (485) selections from 2013 single hills were planted in 16 hill seed increase plots at remote site in the Yonna Valley area. Potato tubers were lifted using a two row, level bed digger on October 8, A team of about 20 research and industry personnel selected 87 clones for further evaluation based on market potential and possible disease resistance. Tubers from these selections were retained and stored at KBREC for seed increase. This material will be evaluated in a Preliminary Yield Trial (PYT 2 Russet) conducted at KBREC and other locations throughout the Pacific Northwest in Preliminary Yield (PYT 1) Specialty Screening Thirty seven (37) selections from 2013 single hills were planted in 16 hill seed increase plots at a remote site in the Yonna Valley area. Potato tubers were lifted using a two row, level bed digger on October 8, A team of about 20 research and industry personnel selected 9 clones for further evaluation based on market potential and possible disease resistance. Tubers from these selections were retained and stored at KBREC for seed increase. This material will be evaluated in a Preliminary Yield Trial (PYT 2 Specialty) conducted at KBREC and other locations throughout the Pacific Northwest in Preliminary Yield (PYT 1) Chip Screening Eighty seven (87) chip selections from 2013 single hills were planted in 16 hill seed increase plots at a remote site in the Yonna Valley area. Potato tubers were lifted using a two row, level bed digger on October 8, Research and industry personnel selected 14 clones for further evaluation based on chipping potential and possible cold sweetening resistance. Seed of these selections was hand collected and stored at the KBREC potato facilities. This material will be evaluated in a Preliminary Yield Trial (PYT 2 Chip) conducted at KBREC and other locations throughout the Pacific Northwest in KBREC will also be increasing seed for future evaluation. 13

14 Fresh Market Value Methods Graphs showing the difference in gross returns per acre (Fresh Market Value) compared to Russet Norkotah are provided for all entries in both the Tri state and Western Regional Russet Trials. Values were calculated by subtracting the gross return of Russet Norkotah from the gross return of each particular entry. Net packing shed returns to growers were calculated using a five year average of fresh potato prices in the Klamath Basin and a packing shed cost of $6.10/cwt. Consultations with several growers and shippers confirmed that these assumptions were valid comparisons to actual prices observed in the Klamath Basin. Assessing the fresh value of a given entry is difficult as packing sheds utilize various tuber sizes to meet current market orders. For example, all tubers that meet 90 or 100 count carton specifications are sometimes used to fill 5 and 10 lb. bale orders. As expected, these types of scenarios are not accounted for in our assumptions. In addition, this type of economic analysis does not account for consumer preference. As such, entries which appear to lack fresh market appeal are highlighted as white bars. The table below lists point prices per tuber size and grade with associated pack fees for grade and size categories used. Five Year KBREC Grade Size Markets/Packaging 1 Klamath Basin Avg. $/cwt Packaging and Handling 4 6 oz lb. poly bags $11.26 $ lb. poly bags $13.26 $ oz. 70, 80, 90 and 100 count $19.22 $ oz. 40, 50, 60 and 70 count $21.87 $6.10 <4 oz. and culls Washed Processed Grade $4.06 $6.10 No oz (50 lb. sacks) $11.19 $ Count = tuber number per 50 lb. carton oz (50 lb. sacks) $9.08 $

15 2014 Replicated Trial Cultural Information Location: Klamath Falls, OR Soil Type: Poe fine sandy loam, ph 6.8 Planting Date: 5/14 5/15 Vine Kill Date: Harvest Date: Irrigation: Plot Length: In row spacing: Row spacing: Number of Reps: August 25 th : Rolled and chopped vines and Reglone application October 2 nd Solid set sprinkler + natural precipitation = 22.5 inches 25 hills (19.27 ft.) 9.25 inches 36 inches 4 reps for Statewide Trials and 2 reps for PYT Trials Fertilizer: Weed Control: Prowl, Matrix Insecticides: Fungicides: Nematode Control: Admire Ridomil/Bravo, Vertisan, Revus Vydate C LV + Fall 2012 application of Telone and Vapam General Comments: The three week period from 7/1 thru 7/21 averaged 91 degrees F for daily high temperature which was 8 degrees higher than the 25 yr average daily high for that time period. Excessive heat stressed most clones which resulted in pointy stem ends. Despite the sustained heat, total yields were slightly above average with the exception of Russet Norkotah which was 50 to 75 cwt lower than typical. Stem end browning and vascular discoloration issues were higher than normal but likely due to moisture stressed plants at time of vine kill. Full irrigation deliveries for A water users occurred despite early fears of curtailments. 15

16 2014 Preliminary Yield (PYT 2) Russet Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The PYT 2 Russet Trial evaluates recently selected clones, often only three years removed from singlehill selection. Retained entries are further evaluated in replicated trials at several Oregon locations before advancing (if applicable) to the Tri state trial which includes testing locations in Washington and Idaho. This trial included 3 standard varieties and 64 new entries. The Oregon Potato Variety Development Team chose to advance 22 selections to the Statewide Russet Trial in 2015 and discarded the remaining selections due to poor performance. Only retained selections are listed in the following tables. Clone Female Parent Male Parent AOR A TE A TE AOR A TE A TE AOR A TE A AOR A TE Western Russet AOR A TE Western Russet AOR A COA AOR A A TE AOR A Dakota Trailblazer AOR PA07V5 3 Stampede Russet AOR PA98NM25 5 AO AOR A A AOR A PA03NM3 4 AOR A PA03NM3 4 AOR A PA03NM3 4 AOR A PA03NM3 4 AOR A PA01N22 5 AOR A T A TE AOR A LB ND028673B 2Russ OR A (STO) OR POR12NCK50 1 PA99N82 4 Western POR12NCK59 1 PA99N82 4 PA01N21 4 AOR A TE A TE 16

17 2014 Statewide Russet Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The Statewide Russet Trial evaluates selections retained from the PYT 2 Russet Trial at three locations in Oregon. As mentioned earlier, selections retained from this trial are advanced to the Tri state Trial which includes testing locations in Washington and Idaho. Testing locations in Oregon represent diverse climatic conditions (hot, long season and cool, short season) which allow for the retention of selections that exhibit stability over multiple locations. Oregon selections remain in the Statewide Trial until they complete Tri state and Western Regional evaluation or are discarded. Despite a warmer season, potato plots at the KBREC site performed above average. The following is a summary of the Klamath Falls field results. Stand Counts 30 Day Slow emergence: AOR (75%), POR11NCV1 1 (62%) 45 Day All entries had greater than 90% final emergence. Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: AOR and POR11NCK1 2 (8) Least: AOR (5), AOR (4) Average Tuber Size (oz.) Largest: AOR (8.7), AOR (8.3) Smallest: POR11NCV1 1 (4.5), AOR (3.8) Undersized Tubers (<4 oz.) cwt/acre Most: AOR (118) Least: AOR (13), AOR (11) Yield and Economic Data Total Yield (cwt/acre) Highest: AOR (584), AOR (567) Lowest: Russet Norkotah (330), POR11NCV1 1 (337) US No. 1 Yield (cwt/acre) Highest: AOR (415), AO (412) Lowest: Russet Burbank (192), AOR (187) 17

18 Carton Yield (6 20 oz.) cwt/acre Highest: AOR (348), AOR (320) Lowest: AOR (86), Russet Burbank (121) Gross Return ($/acre) Fresh Market Highest: OR , AO KF Fresh Market Lowest: AOR , AOR Tuber Defect Incidence (40 tuber sample of oz. tubers) Hollow Heart Notable Defects: AOR (37%), AOR (30%), POR11NC2 1 (22%) Vascular Discoloration Notable Defects: Ranger Russet (35%), AOR (20%), AOR (15%) Stem End Browning Notable Defects: OR08OP284 2 and AOR (42%), AOR and OR (40%) 18 Total Yield US # 1s > 4 oz. US # 2s > 4 oz. Culls & <4 oz. Oversized >20 oz. Carton Yield count (US 1's 6 20 oz) % of total (cwt/a) yield (cwt/ A) stats** % of total yield* Ranger Russet 540 ABCDEF Russet Burbank 518 ABCDEFG Russet Norkotah 330 L AO KF*** 517 ABCDEFG OR ABCDEFGHI AO *** 516 ABCDEFG AOR DEFGHIJK AOR ABCDEFG OR HIJKL AOR BCDEFGHI AOR *** 584 A AOR ABCDE AOR DEFGHIJK AOR ABCDEFG AOR KL AOR EFGHIJK AOR EFGHIJK AOR ABCDEFGH AOR BCDEFGHI AOR EFGHIJK AOR CDEFGHI

19 AOR ABCDEFGH AOR ABCD OR09SP BCDEFGHI OR08OP284 2*** 444 FGHIJK POR11BDPS CDEFGHI POR11NC IJKL POR11NCK1 2*** 563 ABC POR11NCV L AOR *** 415 HIJKL AOR ABCDEFGHI AOR DEFGHIJK AOR *** 568 AB AOR ABCDEFG AOR ABCDEFGH AOR JKL AOR GHIJK AOR KL POR11PG DEFGHI LSD (0.05) 96 US # 1 Yield 6 10 oz Internal Defects (%) >4 oz. %* Specific oz. tubers**** 4 6 (cwt/a) STATS** 6 10 oz. >10 oz. Gravity HH IB SEB VD oz. Ranger Russet 324 CDEFGH Russet Burbank 192 Q Russet Norkotah 227 KLMNPQ AO KF*** 276 EFGHIJKLMNO OR HJLMNOP AO *** 412 AB AOR EFGHIJKLMN AOR AB OR DEFGHIJKL AOR DEFGH AOR *** 415 A AOR DEFGHIJ AOR DEFGHIJ AOR FGHIJKLMNO AOR MNOP AOR DEFGHIJKL AOR OPQ AOR BCDEF

20 AOR GHIJKLMNOP AOR EFGHIJKLM AOR OPQ AOR DEFGHIJ AOR CDEFGH OR09SP LMNOPQ OR08OP284 2*** 309 DEFGH POR11BDPS CDEFG POR11NC GHIJKLMNOP POR11NCK1 2*** 307 DEFGHI POR11NCV NOPQ AOR *** 339 BCDEF AOR HIJKLMNOPQ AOR IJKLMNOPQ AOR *** 358 ABCD AOR ABC AOR ABCDE AOR PQ AOR Q AOR GHIJKLMNO POR11PG DEFGH LSD (0.05) Stand % Average Tuber Wt. No. (oz.) tubers/plant Growth Cracks (1 5 best) Rhizoc (1 5none) Skin Color (1 5 dark) Russeting (1 5 hvy) Shape (1 5 long) Shape Uniformity (1 5 best) Ranger Russet Russet Burbank Russet Norkotah AO KF*** OR AO *** AOR AOR OR AOR AOR *** AOR AOR AOR AOR Eye Depth (1 5 shal.)

21 AOR AOR AOR AOR AOR AOR AOR AOR OR09SP OR08OP284 2*** POR11BDPS POR11NC POR11NCK1 2*** POR11NCV AOR *** AOR AOR AOR *** AOR AOR AOR AOR AOR POR11PG *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ***Entries retained for further testing in 2015 ****Internal Defects: HH=hollow heart, Impact Bruise=impact bruise, SEB=stem end browning, VD=vascular discoloration Ranger Russet Russet Burbank Russet Norkotah AO KF*** OR AO *** AOR AOR OR AOR KBREC Statewide Russet Comments Long, skinny, misshaped, crooky Ugly net, pointy, misshaped, crooky, growth cracks No yield, small, typy but pointy, folded bud ends Misshaped, dents, pears, not fresh, thumbnail cracks, irregular shape Long, lenticel scaring, misshaped, not fresh, shatter bruised Typy, dark, small, apical sprouts Dents, folded bud end, nice skin, not bad Typy, chicken tracks, apical sprouts, flat, thumbnail cracks Blocky, plump, not bad, pointy stem ends, skinning Ugly net, misshaped, not back blocky, thumbnail cracks 21

22 AOR *** AOR AOR AOR AOR AOR AOR AOR AOR AOR AOR AOR AOR OR09SP39 1 OR08OP284 2*** POR11BDPS1 8 POR11NC2 1 POR11NCK1 2*** POR11NCV1 1 AOR *** AOR AOR AOR *** AOR AOR AOR AOR AOR POR11PG61 3 Light, smooth, not bad, long, some bruising, typy, not fresh Deep eyes, misshaped, pears, not fresh, blotchy skin Typy, nice skin, to small, lenticel scaring Pears, round, lumpy, folded bud ends Dark, round, skinning, not bad, dented, some skinning Ugly net, typy, blocky, some pointy stem ends, thumbnail cracks Dents, pears, not fresh, small, apical sprouts, black dot Process, typy, not bad, some pointy, thumbnail cracks Nice skin, irregular shape and size, thumbnail cracks, not bad Typy, dents, flat not fresh, nice net Pears, dark, rhizoc, sticky solon, flat Pears, small, pointy stem end, not fresh Pointy, apical sprouts, smaller, not bad, growth cracks, irregular size Growth cracks, deep eyes, lumpy, drop Typy, small, nice, long, keep Plump, some flat, irregular shapes, not black dot resistant, typy, nice net keep Typy, big, blocky, fair, no yield, short, pears Long, knobs, misshaped, bruised, process Nice net, small but typy, round Blocky, like, typy, keep, nice net Apical sprouts, growth cracks, long, typy, nice Nice net, pears, apical sprouts, typy but pointy Typy, deep eyes, nice net, pointy stem end, blocky Folded bud ends, round, black dot, nice net, pears Thumbnail cracks, rough hide, long, skinny, flat Apical sprouts, small, rough skin, typy, pears, bruising Long, typy, few misshapes, nice, keep, some pointy Typy, nice, keep, dark net, long Dark net, round, to small, bruised, thumbnail cracks, heavy russeting, black dot, not bad 22

23 Ranger Russet Entries Retained for Further Evaluation in KBREC Statewide Russet Comment Russet Burbank 2014 KBREC Statewide Russet Comment Long, skinny, misshaped, crooky Ugly net, pointy, misshaped, crooky, growth cracks Russet Norkotah AOR No yield, small, typy but pointy, folded bud ends Light, smooth, not bad, long, some bruising, typy, not fresh AOR OR08OP284 2 Nice skin, irregular shape and size, thumbnail cracks, not bad Typy, small, nice, long, keep POR11NCK1 2 AOR Typy, big, blocky, fair, no yield, short, pears Blocky, like, typy, keep, nice net 23

24 AOR AOR Apical sprouts, growth cracks, long, typy, nice Typy, deep eyes, nice net, pointy stem end, blocky Differnece in Return from Russet Norkotah ($/Acre) Fresh Value* AOR AOR AOR AOR AO Ranger Russet AOR POR11BDPS1 8 AOR AOR AOR AOR AOR AOR AOR POR11NCK1 2 OR POR11PG61 3 AOR AOR OR08OP284 2 AOR AO KF POR11NC2 1 AOR AOR AOR AOR OR AOR AOR OR09SP39 1 AOR Russet Norkotah Russet Burbank AOR AOR POR11NCV1 1 AOR *Difference in gross return per acre (Fresh Value) from Russet Norkotah calculated by subtracting the gross return of Russet Norkotah from the gross return of the particular entry. Entries with white colored bars may not appeal to fresh market consumers due to the undesirable shape or appearance. Refer to page 14 for parameters used to collect gross return to growers. 24

25 Tri State Russet Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The Tri state Russet Trial evaluates relatively advanced selections originally selected in both Oregon and Idaho. Entries are evaluated for both fresh market and processing potential in Washington, Idaho, and Oregon. Disposition of entries in this trial are determined by the Tri state Technical Committee and if retained, advance to the Western Regional Russet Trial. Despite a warmer season, potato plots at the KBREC site performed above average. The following is a summary of the Klamath Falls field results. Stand Counts 30 Day Slow emergence: AO (75%), A (69%) 45 Day Full emergence: All entries but A (83%) had greater than 90% final emergence. Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: A (10), A CR (8) Least: COA (5), AO (4) Average Tuber Size (oz.) Largest: A (9.1), AO (8.2) Smallest: A (5.0), A TE (4.4) Undersized Tubers (<4 oz.) cwt/acre Most: A TE (80), A (75) Least: A T (15), A TE (13) Yield and Economic Data Total Yield (cwt/acre) Highest: A (664), A (553) Lowest: A TE (378), COA (377) US No. 1 Yield (cwt/acre) Highest: A LB (349), A CR (338) Lowest: Russet Norkotah (206), A TE Carton Yield (6 20 oz.) cwt/acre Highest: A T and A T (270) Lowest: A TE (112)

26 Gross Return ($/acre) Fresh Market Highest: OR , AO KF Fresh Market Lowest: AOR , AOR Tuber Defect Incidence (40 tuber sample of 8 12 oz. tubers) Hollow Heart Notable Defects: AO (15%), AO (10%) Impact Bruise Notable Defects: A VR (20%), A and A (17%) Total Yield US # 1 s* > 4 oz. US # 2 s > 4 oz. Culls & <4 oz. Oversized >20 oz. Carton Yield count (US 1's 6 20 oz) (cwt/a) STATS** % of Total Yield* % of Total Yield (cwt/a) Ranger Russet 539 BCD Russet Burbank 471 BCDEF Russet Norkotah 386 F A DEF A B A TE 416 EF A CDEF A A A LB 436 DEF A VR 531 BCD A CR 548 BC A T 549 BC A T 467 BCDEF A TE 379 F A TE 436 DEF AO DEF AO F AOR KF 516 BCDE COA F LSD (0.05)

27 US # 1 Yield 6 10 oz. Specific Gravity Internal Defects (%) oz. tubers*** %* >4 oz. STATS** 6 10 (cwt/a) 4 6 oz. >10 oz. HH IB SEB VD oz. Ranger Russet 306 ABCDE Russet Burbank 218 DEF Russet Norkotah 206 EF A ABCD A ABCDEF A TE 215 DEF A CDEF A ABCDE A LB 349 A A VR 298 ABCDE A CR 339 AB A T 331 ABC A T 315 ABCDE A TE 175 F A TE 294 ABCDE AO ABCDE AO ABCD AOR KF 237 BCDEF COA ABCDEF LSD(0.05) Stand % Average Tuber Wt. (oz.) Number tubers/plant Green (1 5 none) Growth Cracks (1 5 none) Skin Color (1 5 dark) Russeting (1 5 hvy) Shape (1 5 long) Shape Uniformity (1 5 best) Ranger Russet Russet Burbank Russet Norkotah A A A TE A A A LB A VR A CR Eye Depth (1 5 shal.)

28 A T A T A TE A TE AO AO AOR KF COA *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ***Internal Defects: HH=hollow heart, IB= impact bruise, SEB=stem end browning, VD= vascular discoloration CWT/Acre Total and Market Yield Marketable Yield (U.S #1's and #2's) 28

29 Difference in Return from Russet Norkotah ($/Acre) Fresh Value* *Difference in gross return per acre (Fresh Value) from Russet Norkotah calculated by subtracting the gross return of Russet Norkotah from the gross return of the particular entry. Entries with white colored bars may not appeal to fresh market consumers due to the undesirable shape or appearance. Refer to page 14 for parameters used to collect gross return to growers. Ranger Russet 2014 KBREC Tri State Russet Comment Russet Burbank 2014 KBREC Tri State Russet Comment Pointy, long, crooky, skinny, blotchy skin Pointy, knobs, crooky, misshaped Russet Norkotah A Not bad, blotchy skin, pointy, crooky Not bad, small, rhizoc, no yield, short, dents 29

30 A A TE Long, big, not fresh, dents, pears, pointy stem end, poor, misshaped Long, growth cracks, to skinny, misshaped A A Lenticel scaring, drop, irregular shape, pointy, crooks Long, skinny, rhizoc, not fresh, misshaped, Apical sprouts A LB A VR Small, impact bruise, hard bite, to round, not fresh, thumb nail cracks, Fusarium Shatter bruise, apical sprouts, ugly, folded bud ends, growth cracks, thumb nail cracks A CR A T Growth cracks, dented, green, not fresh, lenticel scaring, irregular shape Dark, long, typy, deep eyes, long, some misshaped, 30

31 A T A TE Dents, misshaped, pears, big, blocky, blotchy skin Growth cracks, shatter bruised, small, no yield thumb nail cracks A TE AO Pears, growth cracks, dented, apical sprouts, plump, round, not fresh Pointy, long, blotchy skin, process only, typy, not fresh, a little lumpy AO AOR KF Dark, typy, low set, fresh, keep, best of trial Pointy stem end, crooky, green, dents, no uniformity, pears COA Round, plumpy, dented, not fresh, big and blocky, flat 31

32 2014 Preliminary Yield (PYT 2) Specialty Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The PYT 2 Specialty Trial evaluates recently selected clones, often only two years removed from singlehill selection. Retained entries are further evaluated in replicated trials at several Oregon locations before advancing (if applicable) to the Tri state trial which includes testing locations in Washington and Idaho. This trial included 2 standard varieties and 22 new entries. The Oregon Potato Variety Development Team chose to advance 10 selections to the Statewide Specialty Trial in 2015 and discarded the remaining selections due to poor performance. Only retained selections are listed in the following tables. Female Parent Male Parent AOR A Y ND4659 5R POR12PG7 1 A757 Or bulk 2/23 POR12PG10 1 B26 Or bulk 2/13 POR12PG26 2 (Alaska 8 3 x OR04198) 6 Or bulk 2/23 POR12PG28 3 (Alaska 8 3 x OR04198) 9 Or bulk 3/4 POR12PG69 1 A558 OR Bulk 3/23 POR12PG73 1 A541 Premier POR12PG76 2 A558 OR Bulk 2/7 OR YAGANA POR02PG

33 2014 Statewide Specialty Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The Statewide Specialty Trial evaluates selections retained from the PYT 2 Specialty Trial at three locations in Oregon. As mentioned earlier, selections retained from this trial are advanced to the Tristate Trial which includes testing locations in Washington and Idaho. Testing locations in Oregon represent diverse climatic conditions (hot, long season and cool, short season) which allow for the retention of selections that exhibit stability over multiple locations. Oregon selections remain in the Statewide Trial until they complete Tri state and Western Regional evaluation or are discarded. Despite a warmer than average growing season and high nematode pressure, potato plots at the KBREC site performed above average. The following is a summary of the Klamath Falls field results. Stand Counts 30 Day Slow emergence: POR10PG3 9 (77%), POR11PG39 3 (87%) 45 Day Full emergence: All entries had greater than 98% final emergence Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: POR11PG62 3 and POR10PG3 5 (18) Least: Red LaSoda (6), Yukon Gold (5) Average Tuber Size (oz.) Largest: Red LaSoda (8.0), Yukon Gold (6.3) Smallest: POR11PG62 13 (1.5), POR10PG3 9 (0.8) C Size Tubers (< inch diameter and <4 oz.) cwt/acre Most: POR11PG62 3 (268), POR11PG62 13 (187) Least: Red LaSoda (5), Yukon Gold (4) B Size Tubers ( inch diameter and <4 oz.) cwt/acre Most: POR10PG3 5 (211), POR11PG62 6 (183) Least: POR10PG3 9 (14), Red LaSoda (23) Yield Data Total Yield (cwt/acre) Highest: POR11PG16 1 (762), POR11PG20 2 (650) Lowest: POR11PG62 13 (279), POR10PG3 9 (147) 33

34 US No. 1 Yield (cwt/acre) Highest: POR11PG16 1 (603) Lowest: POR11PG62 13 (242), POR10PG3 9 (93) Tuber Defect Incidence (40 tuber sample) External Defects High incidence of growth cracks observed in Red LaSoda and moderate greening observed in POR11PG16 1. Internal Defects Impact Bruise: POR11PG20 2 (15%) Vascular Discoloration: POR10PG3 9 (17%) Skin Color Primary skin color (1 5 dark) Flesh Color Primary flesh color (1 5 dark) Total Yield US # 1's > 0 oz. Culls > 0 oz.*** External Defects (1 5 none) Growth crack (cwt/a) STATS** % of Total Yield* Green Knobs Yukon Gold Yellow 1.8 Yellow EFG Red LaSoda Red 3.6 Yellow CD P. Majesty Purple 5.0 Purple CD POR10PG3 5 Red/Yellow 3.6 Yellow DEF POR10PG3 9 Yellow 2.4 Yellow I AOR Red 4.0 Yellow DEFG POR11PG4 2 Yellow 3.0 Yellow FGH POR11PG8 1 Purple 5.0 Purple BC POR11PG16 1 Red 3.6 Yellow A POR11PG20 2 Yellow 2.5 Yellow B POR11PG39 3 Yellow 3.3 Yellow GH POR11PG48 1 Purple 4.9 Purple CDE POR11PG62 3 Yellow/Red 1.5 Yellow EFG POR11PG62 6 Yellow 2.0 Yellow DE POR11PG62 13 Purple 4.0 Purple H LSD (0.05) 102 *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ***Including >14oz. and #2 s 34

35 US # 1 Yield Specific Gravity Internal Defects (%)**** %* (cwt/a) STATS** C B VD IBS SEB IB size size oz. oz. oz. Yukon Gold 338 CDE Red LaSoda 344 CDE P. Majesty 420 BC POR10PG CD POR10PG G AOR CDE POR11PG DEF POR11PG B POR11PG A POR11PG B POR11PG EF POR11PG CD POR11PG CDE POR11PG CD POR11PG F LSD (0.05) 88 Stand % Average Tuber Wt. (oz.) Number tubers/plant Shape Uniform (1 5 best) Rhizoc (1 5 none) Russeting (1 5 hvy) Shape (1 5 long) Size uniformity (1 5 best) Shape uniformity (1 5 best) Yukon Gold Red LaSoda P. Majesty POR10PG POR10PG AOR POR11PG POR11PG POR11PG POR11PG POR11PG POR11PG POR11PG POR11PG POR11PG Eye Depth (1 5 shal.) 35

36 *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ****Internal Defects: VD= Vascular Discoloration, IBS= internal brown center, SEB=stem end browning, IB= impact bruise Yukon Gold Red LaSoda Purple Majesty POR10PG3 5 POR10PG3 9 AOR POR11PG4 2 POR11PG8 1 POR11PG16 1 POR11PG20 2 POR11PG39 3 POR11PG48 1 POR11PG62 3 POR11PG62 6 POR11PG KBREC State Specialty Comments Bronzing, lenticel scaring, misshaped, impact bruise Growth cracks, misshaped, big, lumpy, poor, folded bud ends Dingy, bronzing, culls, dents Sprouts, fair, knobby ends, lumpy Lumpy, sprouts, impact bruise, drop Bronzing, dingy, pears, pointy, lenticel scaring, fair Pink tones, sprouts, small, fair Bronzing, pears, misshaped, drop lumpy, dingy, silver scurf Growth cracks, sprouts, drop, poor, folded bud ends Black dot, impact bruise, no shine, russeting, pointy stem ends, pears Sprouts, pink tones, rhizoc, pears, pointy, stem end rot Shatter bruise, culls, bronzing, misshaped, folded bud ends, Fusarium Fingerling, pink splash, typy Lenticel scaring, rhizoc, small impact bruise, fair, pointy stem end Bronzing, no shine, poor, dull, stem end rot, broken pieces Entries Retained for Further Evaluation in 2015 Yukon Gold 2014 KBREC Statewide Specialty Comment Red LaSoda 2014 KBREC Statewide Specialty Comment Bronzing, lenticel scaring, misshaped, impact bruise Growth cracks, misshaped, sprouts, large, lumpy, poor, folded bud ends, shatter bruised Purple Majesty POR10PG3 5 36

37 Dingy, bronzing, crap, culls, dents Sprouts, fair, knobby ends, lumpy AOR POR11PG20 2 Bronzing, dingy, pears, pointy, lenticel scaring, fair Black dot, impact bruise, no shine, russeting, pointy stem ends, pears POR11PG62 3 POR11PG62 6 Lenticel scaring, rhizoc, small impact bruise, fair, pointy stem end Lenticel scaring, rhizoc, small impact bruise, fair, pointy stem end 37

38 Tri State Specialty Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The Tri state Specialty Trial evaluates relatively advanced selections originally selected in both Oregon and Idaho. Entries are evaluated for both fresh market and processing potential in Washington, Idaho, and Oregon. Disposition of entries in this trial are determined by the Tri state Technical Committee and if retained, advance to the Western Regional Russet Trial. Despite a warmer season, potato plots at the KBREC site performed above average. The following is a summary of the Klamath Falls field results. Stand Counts 30 Day Slow emergence: Chieftain (86%), A Y (88%) 45 Day Full emergence: All entries had greater than 90% final emergence. Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: POR07PG20 2 (16), A RY (14) Least: Yukon Gold (7), Chieftain (10) Average Tuber Size (oz.) Largest: Chieftain (6.3), Yukon Gold (6.1) Smallest: POR07PG20 2 (2.6), POR07PG3 1 (3.2) C Size Tubers (<1.875 inch diameter and <4 oz.) cwt/acre Most: POR07PG3 1 (40), NDA050237B 1R and A RY (34) Least: Yukon Gold (7), Chieftain (9) B Size Tubers ( inch diameter and <4 oz.) cwt/acre Most: A RY (177), POR07PG20 2 (156) Least: Yukon Gold (38), Chieftain (46) Yield Data Total Yield (cwt/acre) Highest: NDA081451CB 1CY (713), A Y (688) Lowest: POR07PG3 1 (418), Yukon Gold (448) US No. 1 Yield (cwt/acre) Highest: NDA081451CB 1CY (588), A RY (559) Lowest: Yukon Gold (353), POR07PG3 1 (386)

39 Tuber Defect Incidence (40 tuber sample) External Defects Moderate greening observed in A Y AND NDA081451CB 1CY. Chieftain tubers had a high incidence of growth cracks. Internal Defects Impact Bruise: Yukon Gold (15%), A RY (10%) Internal Brown Spot: Yukon Gold (20%), POR07PG20 2 (15%) Skin Color Primary skin color (1 5 dark) Flesh Color Primary flesh color (1 5 dark) Total Yield US # 1's > 0 oz. Culls > 0 oz.*** (cwt/a) STATS** % of Total Yield* Green External Defects (1 5 none) Growth crack Chieftain Red 3.8 Yellow ABC NDA050237B 1R Red 4.0 Yellow ABC A PY Purple 4.8 Yellow ABC COA RY Red 4.0 Yellow ABC Yukon Gold Yellow 1.5 Yellow C A Y Yellow 3.3 Yellow AB A RY Pink 2.4 Yellow ABC POR07PG20 2 Y/PK 2.3 Yellow BC POR07PG3 1 Yellow 1.5 Yellow C NDA081451CB 1CY Yellow 1.5 Yellow A LSD (0.05) 237 *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ***Including >14oz. and #2 s Shatter Bruise 39

40 (cwt/a) STATS** US # 1 Yield C size B size %* Specific 4 6 oz oz oz. Internal Defects (%)**** Gravity HH SEB VD IB Chieftain 480 AB NDA050237B 1R 522 AB A PY 500 AB COA RY 404 AB Yukon Gold 294 B A Y 466 AB A RY 620 AB POR07PG AB POR07PG AB NDA081451CB 1CY 568 A LSD (0.05) 229 Stand % Average Tuber Wt. (oz.) Number tubers/plant Rhizoc (1 5none) Russeting (1 5 hvy) Shape (1 5 long) Size Uniformity (1 5 best) Shape Uniformity (1 5 best) Chieftain NDA050237B 1R A PY COA RY Yukon Gold A Y A RY POR07PG POR07PG NDA081451CB 1CY *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ****Internal Defects: HH=hollow heart, SEB=stem end browning, VD=vascular discoloration, IB= impact bruise Eye Depth (1 5 shal.) 40

41 Chieftain 2014 KBREC Tri State Specialty Comment NDA050237B 1R 2014 KBREC Tri State Specialty Comment Sticky stolon, growth cracks, misshaped, bronzing, large, dull, skinning Not bad, typy, some skinning, scab, shatter bruised A PY COA RY Skinning, growth cracks, sticky stolon, folded bud ends, bronzing, bright, fair Not bad, black dot, limited russeting, smooth, green, bright color, fair Yukon Gold A Y Lenticel scaring, not typy for Yukon, flat, growth cracks Purple eyes, green, scab, low black dot, fair, sprouting A RY POR07PG20 2 Really nice, typy, keep, impact bruise, rhizoc, blush color Pointy and knobby stem end, rhizoc, apical sprouting, 41

42 POR07PG3 1 NDA081451CB 1CY Dull, bronzing, scab, sprouts, some pink eyes others aren t Typy, chipper like, green, growth cracks, lenticel scaring 2014 Preliminary Yield (PYT 2) Chip Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch The PYT 2 Chip Trial evaluates recently selected clones, often only two years removed from single hill selection. Retained entries are further evaluated in replicated trials at several Oregon locations before advancing (if applicable) to the Tri state trial which includes testing locations in Washington and Idaho. Five selections were evaluated with two retained for further evaluation. Clone Female Parent Male Parent AOR A MSJ316 A AOR A MSJ316 A 42

43 Statewide Chip Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch Chipping potatoes comprise a significant portion of Klamath Basin acreage and identification of public varieties suitable for export remains a high priority for Basin producers. Trials were initiated in 2008 and 2009 with funding from the Oregon Potato Commission to identify acceptable chipping varieties for export markets using advanced selections and recently released varieties from the Tri State, Southwest, North central, and Eastern breeding programs and have continued annually. In 2014 seven varieties and advanced chipping selections were evaluated for yield, grade, processing quality, and storability to determine their suitability to meet existing export demands for raw product. All field data was collected at the KBREC site. Tubers from each replication were placed in both short and long term commercial storage with processing evaluations conducted by Baley Trotman Farms. Results for 2014 are listed below. Stand Counts 30 Day Slow emergence: AOR (87%) 45 Day All entries but AOR (89%) had greater than 95% final emergence Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: AOR (13), AOR (12) Least: Chipeta (6), OR (7) Average Tuber Size (oz.) Largest: AOR (4.8), Chipeta (4.1) Smallest: AOR (2.4), AOR (2.7) Undersized Tubers (<4 oz.) cwt/acre Most: AOR (109), AOR (108) Least: Chipeta (31), Atlantic (48) Yield Data Total Yield (cwt/acre) Highest: AOR (659), Atlantic (503) Lowest: OR (433), AOR (446) Marketable Yield >4 oz. (cwt/acre) Highest: AOR (497), OR (421) Lowest: Chipeta (275), AOR (317)

44 Tuber Defect Incidence (40 tuber sample) External Defects: Moderate greening observed in AO AOR and APR had a high incidence of shatter bruise. Internal Defects Impact Bruise: AOR (17%), OR , AOR , AOR (12%) Hard Bite: OR (12%), Atlantic (7%) Total Yield > 4 oz. < 4 oz. Culls (cwt/a) STATS** % of Total Yield* Oversize > 14 oz. Skin color (1 5 dark) Atlantic 504 B Chipeta 475 B OR B OR B AOR B AOR B AOR A LSD (0.05) 99 (cwt/a) Yield US # 1 (>4 oz.) STATS** 4 6 oz. %* 6 10 oz oz. Green External Defects (1 5 none) Growth crack Knobs Shatter Atlantic 389 BC Chipeta 275 D OR BCD OR AB AOR BC AOR CD AOR A LSD (0.05) 97 *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level 44

45 Stand % Wt. (oz.) Average Tuber Number tubers/plant Internal Defects (%)*** Specific Gravity HH BC SEB VD HB IB Atlantic Chipeta OR OR AOR AOR AOR Rhizoc (1 5 best) Russeting (1 5 hvy) Shape (1 5 long) Size uniformity (1 5 best) Shape uniformity (1 5 best) Eye Depth (1 5 shal.) Atlantic Chipeta OR OR AOR AOR AOR ***Internal Defects: HH=hollow heart, BC=brown center, SEB=stem end browning, VD=vascular discoloration, HB=hard bite, IB=impact bruise 45

46 2014 KBREC Chip Trial Comments Atlantic Chipeta OR OR AOR AOR AOR Lenticel scaring, rhizoc, folded bud ends, impact bruise Oversize, rhizoc, russeting, low shatter bruise, flat Green, lenticel scaring, black dot, impact bruise, low shatter bruise, fair Russeting, smaller, not bad, low bruise, black dot, dents Smooth, impact bruise, typy, not bad, sticky stolon, pears, black dot Pears, shatter bruise, Fusarium, folded bud ends, smooth, low impact bruise Lenticel scaring, growth cracks, shatter bruise, Fusarium, garbage Atlantic Entries Retained for Further Evaluation in KBREC Statewide Chip Comment Chipeta 2014 KBREC Statewide Chip Comment Lenticel scaring, rhizoc, folded bud ends, impact bruise, Oversize, rhizoc, russeting, low shatter bruise, flat OR OR Green, lenticel scaring, black dot, impact bruise, low shatter bruise, fair Russeting, smaller, not bad, low bruise, black dot, dents AOR Lenticel scaring, growth cracks, shatter bruise, Fusarium, garbage 46

47 2014 Regional Chip Trial Location: OSU KBREC Klamath Falls, OR Planting Date: May 15 Vine Kill Date: September 2 Harvest Date: September 23 Days to Vine kill: 111 Fertility: In Row Spacing: 9.25 inch Chipping potatoes comprise a significant portion of Klamath Basin acreage and identification of public varieties suitable for export remains a high priority for Basin producers. Trials were initiated in 2008 and 2009 with funding from the Oregon Potato Commission to identify acceptable chipping varieties for export markets using advanced selections and recently released varieties from the Tri State, Southwest, North central, and Eastern breeding programs and have continued annually. In 2014 seven varieties and advanced chipping selections were evaluated for yield, grade, processing quality, and storability to determine their suitability to meet existing export demands for raw product. All field data was collected at the KBREC site. Tubers from each replication were placed in both short and long term commercial storage with processing evaluations conducted by Baley Trotman Farms. Stand Counts 30 Day Slow emergence: AC W (89%) 45 Day All entries had greater than 95% final emergence. Plant and Tuber Growth and Development Average Tuber Number Per Plant Most: AC W (9), AC W (8) Least: Chipeta (6) Average Tuber Size (oz.) Largest: Chipeta (8.0), AC W (7.5) Smallest: AC W (4.6), AC W (5.0) Undersized Tubers (<4 oz.) cwt/acre Most: AC W (74), AC W (54) Least: Chipeta (22), AC W (32) Yield Data Total Yield (cwt/acre) Highest: AC W (694), AC W (622) Lowest: AC W (403), AC W (415) Marketable Yield >4 oz. (cwt/acre) Highest: AC W (321), AC W (318) Lowest: Chipeta (193), AC W (196) 47

48 % Marketable Yield >4 oz. Highest: A and AC W (83%) Lowest: Chipeta (57%) Tuber Defect Incidence (40 tuber sample) Internal Defects Impact Bruise: A (7%) Stem End Browning: AC W (12%), AC W (10%) Total Yield > 4 oz. < 4 oz. Culls (cwt/a) STATS** % of Total Yield* Oversize > 14 oz. Skin color rating (1 5 dark) Atlantic 534 A Chipeta 505 A A B AC W 435 B AC W 694 A AC W 415 B AC W 623 B LSD (0.05) 19 Yield US # 1 (>4 oz.) External Defects (1 5 none) (cwt/a) STATS** 4 6 oz. Atlantic 391 BC Chipeta 290 A A C AC W 359 C AC W 521 B AC W 316 C AC W 498 B LSD (0.05) 62 *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level %* 6 10 oz oz. Green Growth crack Knobs Shatter 48

49 Stand % Average Tuber Wt. (oz.) Number tubers/plant Specific Gravity Internal Defects (%)*** HH BC SEB VD HB IB Atlantic Chipeta A AC W AC W AC W AC W Rhizoc (1 5 best) Russeting (1 5 hvy) Shape (1 5 long) Size uniformity (1 5 best) Shape uniformity (1 5 best) Eye Depth (1 5 shal.) Atlantic Chipeta A AC W AC W AC W AC W *Percent values may not total 100% due to rounding **Entries showing the same letter are not significantly different at the 5% level ***Internal Defects: HH=hollow heart, BC=brown center, SEB=stem end browning, VD=vascular discoloration, HB=hard bite, IB=impact bruise 49

50 Atlantic 2014 KBREC Statewide Chip Comment Chipeta 2014 KBREC Statewide Chip Comment Green, russeting, flat, bruised Lumpy, oversized, folded bud ends, black dot, shatter bruised A AC W Dented, pears, oblong, impact bruise, misshaped russeting Typy, no skinning, smooth, smaller, minimal bruising AC W AC W Dented, lumpy, folded bud end, pointy stem end Lenticel scaring, dented, smooth, fair, shatter bruised AC W Fusarium dry rot, some black dot, russeting, sticky stolon 50

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