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GERMPLASM

Registration of W6 26740, W6 26743, and W6 26745 Green Pea Germplasm Resistant to Fusarium Root Rot

^a USDA-ARS, Plant Germplasm Introduction and Testing, 59 Johnson Hall, Washington State Univ., Pullman, WA 99164
^b USDA-ARS, Vegetable and Forage Crops Research, 24106 N. Bunn Rd. Prosser, WA 99350
^c Northwestern Washington Research & Extension Center, Washington State Univ., Mount Vernon, WA 98273
^d USDA-ARS, Horticultural Crops Research Lab., 3420 N.W. Orchard, Corvallis, OR 97330
^e USDA-ARS, Grain Legume Genetics Physiology Research, 303 E Johnson Hall, Pullman, WA 99164

^* Corresponding author (coynec{at}wsu.edu).

ABSTRACT

Three F₈–derived breeding lines W6 26740 (RIL 846_34; GP-96, PI 652444), W6 26743 (RIL 846_40; GP-97, PI 652445), and W6 26745 (RIL 847_36; GP-98, PI 652446) of green pea (Pisum sativum L.), selected from a recombinant inbred line population developed by the USDA–ARS in 2002, are unique in combining high levels of resistance to Fusarium root rot [caused by Fusarium solani (Mart.) Sacc. f. sp. pisi (F.R. Jones) W.C. Snyder & H.N. Hans.] with acceptable agronomic traits. They will be useful as a resource for developing root rot resistant green pea cultivars. The parentage of W6 26740, W6 26743, and W6 26745 is a cross between ‘Dark Skin Perfection’/90-2131 made in 1994 at Pullman, WA. Dark Skin Perfection is a freezing and canning cultivar characterized by straight, blunt, green, double pods; it was used by pea breeders in the 1950s as a source of resistance to Fusarium wilt race 1 [caused by F. oxysporum Schlecht. f. sp. pisi (van Hall) Snyd. & Hans]. 90-2131 is a germplasm release characterized by white flowers, green cotyledons, a clear seed coat, a black hilum and dimpled seed. This line has partial resistance to Aphanomyces root rot (caused by Aphanomyces euteiches Drechs.), Fusarium root rot, and Fusarium wilt races 1, 5, and 6. W6 26740, W6 26743 and W6 26746 are expected to serve as parental lines in the development of cultivars with improved disease resistance primarily to Fusarium root rot.

Abbreviations: RFDN, Roza Fusarium Disease Nursery • RIL, recombinant inbred line