|Coyne, Clarice - Clare|
|Pilet nayel, Marie-laure|
Submitted to: Journal of Plant Registrations
Publication Type: Peer reviewed journal
Publication Acceptance Date: 12/8/2011
Publication Date: 5/1/2012
Citation: Mcgee, R.J., Coyne, C.J., Pilet Nayel, M., Moussart, A., Tivoli, B., Baranger, A., Hamon, C., Mcphee, K., Vandemark, G.J. 2012. Registration of Pea Germplasm Partially Resistant to Aphanomyces Root Rot for Breeding Fresh or Freezer Pea and Dry Pea Types. Journal of Plant Registrations. 6:203-207. Interpretive Summary: Cool season grain legumes, including pea (Pisum sativum L.), are integral components of cereal-based cropping systems in the Pacific Northwest and North Central US. In 2009, peas (excluding wrinkled-seeded types) were produced on over 885,800 acres in the US, with a crop value estimated at $200,556,000 (National Agricultural Statistical Services, 2009 Crop Production Data). The pea industry requires varieties that are high yielding, disease resistant, tolerant to lodging and produce good quality seed. Aphanomyces root rot is the most destructive root rotting disease of pea globally. Yield losses attributed to Aphanomyces root rot can easily average 20% and 100% yield loss is not unknown. This article describes and registers seven pea germplasm lines with high levels of tolerance to Aphanomyces root rot and good agronomic characteristics. These lines will be freely available to researchers and plant breeders.
Technical Abstract: Seven F8 derived breeding lines, 846-07, 847-08, 847-22, 847-45, 847-50, 847-53 and 847-68, of green pea (Pisum sativum, L.) were selected from a recombinant inbred line population that was developed by the USDA ARS in 2002. These lines are unique as they combine high levels of tolerance to Aphanomyces rot root (Aphanomyces euteiches, Drechs.) and good agronomic characteristics. The pedigree of the seven lines is ‘Dark Skin Perfection’ x 90-2131. This cross and the resulting recombinant inbred line population were made to identify QTLs associated with tolerance to Aphanomyces root rot. 'Dark Skin Perfection’ is a wrinkle-seeded cultivar characterized by straight, blunt, green, double pods and white flowers. It is resistant to Fusarium wilt race 1 (Fusarium oxysporum Schlecht. f. sp. pisi (van Hall) W.C. Snyder & H.N. Hans). 90-2131 is a germplasm release characterized by white flowers, green cotyledons, a clear seed coat, a black hilum and dimpled seed (Kraft 1992). 90-2131 has partial resistances to Aphanomyces root rot, Fusarium root rot (Fusarium solani (Mart.) Sacc. f. sp. pisi (F.R. Jones) W.C. Snyder & H.N. Hans.) and Fusarium wilt races 1, 5 and 6 (Haglund & Kraft, 2001). These lines will be useful as parents in breeding programs whose objectives include the development of pea cultivars with improved root rot tolerance.