Development of new potato cultivars for Colorado via germplasm enhancement and evaluation

<p>NON-TECHNICAL SUMMARY:<br/> Many challenges and opportunities are confronting the Colorado potato industry. These challenges/opportunities include new diseases pressures, food safety, water quality/supply, current market constraints, new market development (processing, exporting, etc.), changing consumer expectations, and increasing costs with highly variable potato prices. To help meet these challenges, continued emphasis needs to be placed on developing new potato cultivars with economically important characteristics. Cultivars with these characteristics will help assure that the potato industry in Colorado and the United States will remain productive and in a competitive position.
<p>APPROACH: <br/>1. Parental material from diverse sources with characteristics of importance such as disease resistance and improved nutritional quality will be identified. Crosses will be made in the greenhouse among selected parental clones to produce segregating populations. True seed obtained from crosses will be grown in the greenhouse. Seedling tubers will be produced from the true seed and in addition to several thousand obtained from other breeding programs, will be planted in the field for subsequent selection and evaluated for visual agronomic traits. 2. Superior progeny will undergo additional evaluation in subsequent years. 3. Once advanced selections with desirable characteristics are identified, limited generation seed stocks will be developed and made available to growers for evaluation and further seed increase prior to official release and naming. 5.
Export potential will be determined through evaluation in out-of-state and international trials where appropriate.
PROGRESS: 2012/01 TO 2012/12OUTPUTS: The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialties) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). The primary emphasis is placed on the development of russet cultivars. The balance of the breeding effort is devoted to
developing red, specialty, and chipping cultivars. This broad approach is important because it recognizes the diverse markets accessed by potato growers throughout Colorado and many other states in the region. Seventy-five advanced selections were saved and will be increased in 2013 pending results of ongoing evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by Colorado producers in 2012, included 12 russets (CO04211-4RU, CO04220-7RU, CO04233-1RU, AC00395-2RU, CO03187-1RU, CO03202-1RU, CO03276-4RU, CO03276-5RU, AC99375-1RU, CO99053-3RU, CO99053-4RU, and CO99100-1RU), 4 reds (CO04159-1R, CO00291-5R, CO99076-6R, and CO99256-2R), 11 chippers (AC00206-2W, AC03452-2W, AC01151-5W, AC03433-1W, CO02024-9W, CO02033-1W, CO02321-4W, CO03243-3W, CO00188-4W, CO00197-3W, and CO00270-7W), and 22 specialties (AC03534-2R/Y, CO04029-5W/Y,
CO04067-8R/Y, CO04099-3W/Y, CO04099-4W/Y, CO04188-4R/Y, CO04056-3P/PW, CO04063-4R/R, CO03134-4RF/RW, CO04021-2R/Y, CO04013-1W/Y, CO97226-2R/R, CO97232-2R/Y, CO97222-1R/R, CO97227-2P/PW, AC99329-7PW/Y, AC99330-1P/Y, CO99045-1W/Y, ATC00293-1W/Y, CO00405-1RF, CO00412-5W/Y, and CO00415-1RF). Several selections are being considered for exclusive release. Selections to be named are AC99329-7PW/Y (Masquerade), CO99053-3RU (Crestone Russet), CO99100-1RU (name to be determined). PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.
</p><p>PROGRESS: <br/>2011/01/01 TO 2011/12/31 <br/>OUTPUTS: The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialties) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive
and in a competitive position. Seventy advanced selections were saved and will be increased in 2012 pending results of ongoing evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by Colorado producers in 2011, included 10 russets (AC99375-1RU, AC00395-2RU, CO97087-2RU, CO99053-3RU, CO99053-4RU, CO99100-1RU, CO03187-1RU, CO03202-1RU, CO03276-4RU, and CO03276-5RU), 4 reds (CO98012-5R, CO99076-6R, CO99256-2R, and CO00291-5R), 9 chippers (AC01151-5W, AC03433-1W, CO95051-7W, CO00188-4W, CO00197-3W, CO00270-7W, CO02024-9W, CO02033-1W, and CO02321-4W), and 15 specialties (ATC00293 -1W/Y, AC99329-7PW/Y, AC99330-1P/Y, CO97222-1R/R, CO97226-2R/R, CO97232-1R/Y, CO97232-2R/Y, CO00412-5W/Y, CO01399-10P/Y, CO03027-2R/R, CO03094-5RF/RW, CO04021-2R/Y, CO04013-1W/Y, CO04117-5PW/Y, and CO04045-4P/P). Current plans are to name AC99329-7PW/Y, CO99053-3RU,
CO99100-1RU, CO95051-7W in 2012. Plant Variety Protection was granted to Rio Colorado in 2011. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.
<p>PROGRESS: <br/>2010/01/01 TO 2010/12/31 <br/>OUTPUTS: The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialties) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive
and in a competitive position. Fifty-five advanced selections were saved and will be increased in 2011 pending results of ongoing evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by Colorado producers in 2010, included 6 russets (AC99375-1RU, CO97087-2RU, CO98067-7RU, CO99053-3RU, CO99053-4RU, and CO99100-1RU), 2 reds (CO99076-6R and CO99256-2R), 9 chippers (AC01151-5W, CO95051-7W, CO97043-14W, CO00188-4W, CO00197-3W, CO00270-7W, CO02024-9W, CO02033-1W, and CO02321-4W), and 8 specialties (AC97521-1R/Y, AC99329-7PW/Y, ATC00293 -1W/Y, CO97226-2R/R, CO97232-2R/Y, CO00412-5W/Y, CO01399-10P/Y, TC02072-3P/P). Consideration is being given to releasing CO95051-7W. This round white selection has excellent chip color after long term storage. Plant Variety Protection was granted to Rio Grande Russet in 2010. PARTICIPANTS: Not relevant to this
project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.
<p>PROGRESS: <br/>2009/01/01 TO 2009/12/31 <br/>OUTPUTS: The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialties) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive
and in a competitive position. Forty-four advanced selections were saved and will be increased in 2010. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers in 2009, included 10 russets (AC96052-1RU, AC99375-1RU, CO94035-15RU, CO95172-3RU, CO97087-2RU, CO98067-7RU, CO98368-2RU, CO99053-3RU, CO99053-4RU, and CO99100-1RU), 5 reds (CO98012-5R, CO99076-6R, CO99256-2R, CO00277-2R, and CO00291-5R), 7 chippers (CO95051-7W, CO96141-4W, CO97043-14W, CO97065-7W, CO00188-4W, CO00197-3W, and CO00270-7W), and 17 specialties (AC97521-1R/Y, AC99329-7PW/Y, AC99330-1P/Y, ATC00293 -1W/Y, CO97222-1R/R, CO97226-2R/R, CO97227-2P/PW, CO97232-1R/Y, CO97232-2R/Y, CO97233-3R/Y, CO99045-1W/Y, CO00379-2R/Y, CO00405-1R, CO00412-5W/Y, CO00415-1R, CO01399-10P/Y, and VC1009-1W/Y). Mesa Russet (CO94035-15RU) was named in 2009. Mesa Russet is a high yielding,
dual-purpose russet. It has a medium maturity and a high percentage of US #1 tubers. It is resistant to second growth, blackspot bruise, shatter bruise, powdery scab (tuber and root galling) and verticillium wilt. It has also shown potential to fry after storage. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.<p>PROGRESS: <br/>2008/01/01 TO 2008/12/31 <br/>OUTPUTS: The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialties) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive
and in a competitive position. Forty-eight advanced selections were saved and will be increased in 2009. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers in 2008, included 11 russets (AC96052-1RU, AC99375-1RU, CO94035-15RU, CO95086-8RU, CO95172-3RU, CO97087-2RU, CO98067-7RU, CO98368-2RU, CO99053-3RU, CO99053-4RU, and CO99100-1RU), 5 reds (CO98012-5R, CO99076-6R, CO99256-2R, CO00277-2R, and CO00291-5R), 8 chippers (CO95051-7W, CO96141-4W, CO97043-14W, CO97065-7W, AC00170-2W, CO00188-4W, CO00197-3W, and CO00270-7W), and 19 specialties (AC97521-1R/Y, AC99329-7PW/Y, AC99330-1P/Y, ATC00293 -1W/Y, CO97215-2P/P, CO97222-1R/R, CO97226-2R/R, CO97227-2P/PW, CO97232-1R/Y, CO97232-2R/Y, CO97233-3R/Y, CO99045-1W/Y, CO99338-3RU/Y, CO00379-2R/Y, CO00405-1R, CO00412-5W/Y, CO00415-1R, VC1002-3W/Y, and VC1009-1W/Y). A decision to release selection
CO94035-15RU was made. CO94035-15RU is a medium maturing, high yielding russet with a high percentage of US #1 tubers. It is resistance to blackspot bruise and has shown the potential to fry after storage. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Potato growers, shippers, and processors, and the consuming public. PROJECT MODIFICATIONS: Not relevant to this project.
<p>PROGRESS: <br/>2007/01/01 TO 2007/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive and in a
competitive position. Ninety-three parental clones were intercrossed in 2007 in two separate crossing blocks. The emphasis of the first crossing block was russet, red, and specialty cultivar development. The second emphasized russet and red cultivar development, PVY immunity, and nematode resistance. Seed from 383 combinations was obtained. Approximately 46,227 seedling tubers representing 249 families were produced from 2003, 2005, and 2006 crosses, for initial field selection in 2008. These seedlings represent crosses segregating primarily for russet, reds, specialty types, and disease resistance/immunity (late blight, PLRV, and PVY). Second through fourth size seedling tubers will be distributed to Idaho (USDA-ARS), Minnesota, North Dakota, Texas, Wisconsin, and Alberta, Canada (Agriculture Canada). Colorado grew 80,101 first-year seedlings in 2007, with 643 selected for subsequent
planting, evaluation, and increase in future years. A portion of these seedlings were obtained from the USDA-ARS, Agriculture Canada, North Dakota State University, and Texas A&M University. Another 893 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 229 were saved for further observation. Forty-three advanced selections were saved and will be increased in 2008. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers in 2007, included 8 russets (AC96052-1RU, CO94035-15, CO95172-3RU, CO97087-2RU, CO97138-3RU, CO97138-7RU, CO98067-7RU, and CO98368-2RU), 4 reds (CO98012-5R, CO99076-6R, CO99256-3R, and CO99256-2R), 5 chippers (AC97097-14W, AC99213-8W, CO96141-4W, CO97043-14W, and CO97065-7W), and 13 specialties (AC97521-1R/Y, AC99329-7PW/Y, AC99330-1P/Y, CO97215-2P/P, CO97222-1R/R, CO97226-2R/R,
CO97227-2P/PW, CO97232-1R/Y, CO97232-2R/Y, CO97233-3R/Y, CO99045-1W/Y, CO99338-3RU/Y, and VC1009-W/Y).<p>
PROGRESS: <br/>2006/01/01 TO 2006/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to collaborate with growers, shippers, processors, and research personnel to assess the production, adaptability, marketability, and other characteristics of advanced selections from the Colorado program; (3) to provide a basic seed source of selections to growers for seed increase and commercial testing; (4) to evaluate promising selections for potential seed export (interstate and international). Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive and in a
competitive position. Ninety-three parental clones in 2006 in two separate crossing blocks. The emphasis of the first crossing block was russet cultivar development, PVY immunity, and nematode resistance. The second emphasized russets, reds, specialty, and late blight resistance. Seed from 272 combinations was obtained. Approximately 55,215 seedling tubers representing 282 families were produced from 2004 and 2005 crosses, for initial field selection in 2007. These seedlings represent crosses segregating primarily for russet, reds, specialty types, and disease resistance/immunity (late blight, PLRV, and PVY). Second through fourth size seedling tubers will be distributed to Idaho (USDA-ARS), Minnesota, North Dakota, Texas, Wisconsin, and Alberta, Canada. Colorado grew 80,019 first-year seedlings in 2006, with 653 selected for subsequent planting, evaluation, and increase in future years.
A portion of these seedlings were obtained from the USDA-ARS, Agriculture Canada, North Dakota State University, and Texas A&M University. Another 1,080 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 263 were saved for further observation. Forty-eight advanced selections were saved at harvest and will be increased in 2007 pending final evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers in 2006, included 9 russets (AC96052-1RU, CO94035-15RU, CO95086-8RU, CO95172-3RU, CO97087-2RU, CO97090-4RU, CO97138-3RU, CO97138-7RU, and TC1675-1RU), 1 reds (CO98012-5R), 7 chippers (AC97097-14W, ATDC9801-3P, CO95051-7W, CO96141-4W, CO97043-14W, CO97065-7W, and CO98277-4W), and 16 specialty selections (AC97521-1R/Y, ATC98444-1R/Y, ATC98495-1W/Y, ATC98509-1R/Y, CO97215-2P/P, CO97222-1R/R,
CO97226-2R/R, CO97227-2P/PW, CO97232-1R/Y, CO97232-2R/Y, CO97233-3R/Y, CO97274-2W/Y, VC0967-2R/Y, VC1002-3W/Y, VC1009-1W/Y, and VC1123-2W/Y) and one long white (CO97137-1W). Two other selections, AC92009-4RU (Canela Russet) and NDC5281-2R (Rio Colorado), will be named in 2007. AC92009-4RU is a fresh market selection with excellent tuber type and a long dormancy. NDC5281-2R has a bright red skin with a high percentage of B sized tubers.
<p>PROGRESS: <br/>2005/01/01 TO 2005/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, improved nutritional characteristics, resistance to diseases and pests, and tolerance to environmental stresses; (2) to provide a basic seed source of selections to growers for seed increase and commercial testing; (3) to evaluate promising selections for potential seed export (interstate and international). Additional breeding emphasis is placed on identifying germplasm and developing cultivars that are: (1) immune to PVY; (2) resistant to late blight (foliar and tuber); (3) resistant to storage rots [dry rot (Fusarium and early blight) and bacterial soft rot]; (4) resistant to powdery scab; and (5) that have improved consumer
characteristics such as improved red skin color retention and improved shelf life. Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive and in a competitive position. One hundred parental clones were intercrossed in 2005 in two separate crossing blocks. The emphasis of the first crossing block was specialty cultivar development and PVY and late blight resistance. The second emphasized russets, reds, specialty, and PVY immunity. Seed from 279 combinations was obtained. Approximately 56,302 seedling tubers representing 219 families were produced from 2003 and 2004 crosses, for initial field selection in 2006. These seedlings represent crosses segregating primarily for russet, reds, chippers, specialty types, and disease resistance/immunity (late blight, PLRV, and PVY). Colorado grew 85,007 first-year seedlings in 2005, with 848
selected for subsequent planting, evaluation, and increase in future years. A portion of these seedlings were obtained from the other breeding programs. Another 789 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 254 were saved for further observation. Fifty-three advanced selections were saved at harvest and will be increased in 2006 pending final evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers, included 7 russets (AC92009-2RU, CO93001-11RU, AC96051-1RU, CO94035-15RU, CO95086-8RU, CO95172-3RU, and TC1675-1RU), 4 reds (CO93037-6R, CO97078-5R, NDC5281-2R, and VC1075-1R), 5 chippers (AC97097-14W, CO95051-7W, CO96141-4W, CO97043-14W, and CO97065-7W), and 11 specialty selections (AC97521-1R/Y, CO94157-2W/Y, CO97226-2R/R, CO97232-1R/Y, CO97232-2R/Y, CO97233-3R/Y, VC0967-2R/Y,
VC1002-3W/Y, VC1009-1W/Y, VC1015-7R/Y, and VC1123-2W/Y) and one long white (CO97137-1W). Recent releases undergoing commercialization include Rio Grande Russet (AC89536-5RU), Colorado Rose (CO89097-2R), Mountain Rose (CO94183-1R/R), and Purple Majesty (CO94165-3P/P). Two selections, AC92009-4RU and NDC5281-2R, will likely be named in the near future. AC92009-4RU is a fresh market selection with excellent tuber type and a long dormancy. NDC5281-2R has a bright red skin with a high percentage of B sized tubers.<p>PROGRESS: <br/>2004/01/01 TO 2004/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, resistance to diseases and pests, and tolerance to environmental stresses; (2) to provide a basic seed source of selections to growers for seed increase and commercial testing; and (3) to evaluate promising selections for potential seed export (interstate and international). Additional breeding emphasis is placed on identifying germplasm and developing cultivars that have: (1) improved nutritional quality and other consumer characteristics; (2) immunity to PVY; (3) resistance to late blight (foliar and tuber); (4) resistance to storage rots [dry rot (Fusarium and early blight) and bacterial soft rot]; and (5) resistance to powdery scab.
Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive and in a competitive position. One hundred parental clones were intercrossed in 2004 in two separate crossing blocks. The emphasis of the first crossing block was specialty cultivar development and the second emphasized russets, reds, specialty, and PVY immunity. Seed from 428 combinations was obtained. Approximately 65,000 seedling tubers representing 235 families were produced from 2003 and 2004 crosses, for initial field selection in 2005. These seedlings represent crosses segregating primarily for russets, reds, chippers, specialty types, and disease resistance/immunity (late blight, PLRV, and PVY). Second through fourth size seedling tubers will be distributed to the USDA-ARS, Minnesota, North Dakota, Texas, Wisconsin, and Alberta, Canada. Colorado grew 79,334 first-year
seedlings in 2004, with 549 selected for subsequent planting, evaluation, and increase in future years. A portion of these seedlings were obtained from USDA-ARS, Agriculture Canada, North Dakota State University, and Texas A&M University. Another 878 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 268 were saved for further observation. Forty-three advanced selections were saved at harvest and will be increased in 2005 pending final evaluations. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers, included 9 russets (AC87084-3RU, AC89536-5RU, AC92009-2RU, AC93026-9RU, CO93001-11RU, CO94035-15RU, CO95086-8RU, CO95172-3RU, and TC1675-1RU), 4 reds (CO89097-2R, CO93037-6R, NDC5281-2R, and VC1075-1R), 3 chippers (BC0894-2W, and CO95051-7W, and CO96141-4W), and 8 specialty selections (CO94157-2W/Y,
CO94165-3P/P, CO94183-1R/R, VC0967-2R/Y, VC1002-3W/Y, VC1009-1W/Y, and VC1015-7R/Y, and VC1123-2W/Y). Advanced selections/recent releases undergoing commercialization include AC89536-5RU (Rio Grande Russet) and CO89097-2R (Colorado Rose). Exclusive release or public release for BC0894-2W, CO85026-4RU (Fremont Russet), and CO86218-2R (Durango Red) is being evaluated. Two selections showing potential for naming include CO94165-3P/P and CO94183-1R/R. Both of these specialty selections have colored flesh.<p>PROGRESS: <br/>2003/01/01 TO 2003/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, resistance to diseases and pests, and tolerance to environmental stresses; (2) to provide a basic seed source of selections to growers for seed increase and commercial testing; and (3) to evaluate promising selections for potential seed export (interstate and international). Additional breeding emphasis is placed on identifying germplasm and developing cultivars that are: (1) immune to PVY; (2) resistant to late blight (foliar and tuber); (3) resistant to storage rots [dry rot (Fusarium and early blight) and bacterial soft rot]; (4) resistant to powdery scab; and (5) that have improved nutritional quality and other consumer
characteristics. Cultivars with these characteristics will help assure that the potato industry in Colorado will remain productive and in a competitive position. Ninety parental clones were intercrossed in 2003 in two separate crossing blocks. The emphasis of the first crossing block was specialty cultivar development and the second emphasized russets, reds, chippers, and PVY immunity. Seed from 446 combinations was obtained. Approximately 50,000 seedling tubers representing 213 families were produced from 2000, 2001, and 2002 crosses, for initial field selection in 2004. These seedlings represent crosses primarily segregating for russet, reds, chippers, specialty types, and disease resistance/immunity (late blight and PVY). Second through fourth size seedling tubers will be distributed to the USDA-ARS, the University of Minnesota, Texas A&M, the University of Wisconsin, and Agriculture
Canada in 2004. Colorado grew 68,371 first-year seedlings in 2003, with 576 selected for subsequent planting, evaluation, and increase in future years. A portion of these seedlings was obtained from the USDA-ARS, Agriculture Canada, Texas A&M University, and the University of Wisconsin. Another 1,101 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 336 were saved for further observation. Forty-two advanced selections were saved at harvest and will be increased in 2004 pending final evaluations. Another 241 selections and cultivars were maintained for germplasm development, breeding, other experimental purposes, or seed increases for the other programs. Advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers, included 9 russets (AC87084-3RU, AC89536-5RU, AC92009-2RU, AC93026-9RU, CO93001-11RU,
CO93016-3RU, CO94035-15RU, CO94084-12RU, and TC1675-1RU), 5 reds (CO89097-2R, CO93037-6R, CO94019-1R, NDC5281-2R, and VC1075-1R), 5 chippers (AC87340-2W, AC94296-5W, BC0894-2W, CO95051-7W, and CO95070-7W), and 8 specialty selections (CO94165-3P/P, CO94183-1R/R, VC0967-2R/Y, VC0967-5R/Y, VC1002-3W/Y, VC1009-1W/Y, VC1015-1R/Y, and VC1015-7R/Y). Advanced selections undergoing commercialization include Durango Red (CO86218-2R), AC89536-5RU, and CO89097-2R.<p>PROGRESS: <br/>2002/01/01 TO 2002/12/31 <br/>The major objectives of the Colorado Potato Breeding & Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, & specialty) with increased yield, improved quality, resistance to diseases & pests, & tolerance to environmental stresses; (2) to provide a basic seed source of selections to growers for seed increase & commercial testing; & (3) to evaluate promising selections for potential seed export (interstate & international). The primary emphasis is placed on the development of russet cultivars. The balance of the breeding effort, in order of priority, is devoted to developing reds, chippers, & specialty cultivars. Additional breeding emphasis is placed on identifying germplasm & developing cultivars that are: 1) immune to PVY; 2) resistant to late blight (foliar & tuber); 3) resistant to dry rot
(Fusarium & early blight) & bacterial soft rot; 4) resistant to powdery scab; & 5) developing protocols to screen & evaluate advanced selections for reduced tuber greening potential & red skin color retention in storage. Sixty parental clones were intercrossed in 2002. Emphasis was cultivar development & late blight resistance. Seed from 359 combinations was obtained. A total of 48,153 seedling tubers representing 187 families were produced from 2000 & 2001 crosses, for initial field selection in 2003. These seedlings represent crosses segregating for russet, reds, chippers, specialty types, & disease resistance/immunity (PVX, PVY, PLRV, & late blight). Second thru fourth size seedling tubers will be distributed to Idaho (USDA), Maine (USDA-Beltsville), Minnesota, Oregon, Texas, & Alberta, Canada. Colo. grew 77,072 first year seedlings, with 848 being retained for subsequent planting,
evaluation, & increase in future years. Some of these seedlings were obtained from breeding programs in Idaho, Texas, and Canada. Another 1,195 clones were in 12-hill, preliminary, and intermediate stages of selection. At harvest, 282 were saved for further observation. Forty-two advanced selections were saved at harvest and will be increased pending final evaluations. Another 232 selections & cultivars were maintained for germplasm development, breeding, other experimental purposes, or seed increases for the other programs. Colo. advanced selections evaluated in the Southwest Regional Trials, Western Regional Trials, or by producers, included 10 russets (AC87084-3RU, AC89536-5RU, AC92009-2RU, AC93026-9RU, AC93047-1RU, CO92077-2RU, CO93001-11RU, CO93016-3RU, NDC5372-1RU, & TC1675-1RU), 6 reds (CO89097-2R, CO93037-6R, CO94019-1R, CO94065-2R, NDC5281-2R, & NDC6184-3R), 3 chippers
(AC87340-2W, BC0894-2W, & NDC6084C-2W), & 6 specialty selections (CO94165-3P/P, CO94183-1R/R, CO94222-6RU/Y, VC0967-2R/Y, VC0967-5R/Y, & VC1002-3W/Y). Forty-nine Colo. selections were screened for resistance to late blight by Oregon State Univ. About 45% of the selections show relatively high levels of resistance to foliar infection. Advanced selections/recent releases undergoing commercialization include Cherry Red (DT6063-1R), Fremont Russet (CO85026-4), Durango Red (CO86218-2) & BC0894-2W. BC0894-2W is a chipper with international export potential.
<p>PROGRESS: <br/>2001/01/01 TO 2001/12/31 <br/>The major objectives of the Colorado Potato Breeding and Selection Program are: (1) to develop new potato cultivars (russets, reds, chippers, and specialty) with increased yield, improved quality, resistance to diseases and pests, and tolerance to environmental stresses; (2) to provide a basic seed source of selections to growers for seed increase and commercial testing; and (3) to evaluate promising selections for potential seed export (interstate and international). The primary emphasis is placed on the development of russet cultivars. The balance of the breeding effort, in order of priority, is devoted to developing reds, chippers, and specialty cultivars. Other areas of emphasis are: 1) developing cultivars immune to PVY; 2) developing cultivars with tuber resistance to dry rot (Fusarium and early blight) and bacterial soft
rot; 3) identifying and incorporating breeding material demonstrating resistance to powdery scab; and 4) developing protocols to screen and evaluate advanced selections for reduced tuber greening potential and red skin color retention in storage. Eighty-nine parental clones were intercrossed in 2001 in two separate crossing blocks. The emphasis of the first crossing block was disease resistance (late blight and PVY) and the second emphasized cultivar development and virus resistance (PVX, PVY, and PLRV). Seed from 605 combinations was obtained. Approximately 45,000 seedling tubers representing 166 families were produced from 2000 crosses, for initial field selection in 2002. Second thru fourth size seedling tubers will be distributed to Idaho, Minnesota, Oregon, Texas, and Alberta, Canada. Colorado grew 77,993 first year seedlings, with 930 being retained for subsequent planting,
evaluation, and increase in future years. Some of these seedlings were obtained from breeding programs in Idaho, Texas, and Canada. Another 1,07.</p>