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 Plant Germplasm Introduction and Testing Research: Pullman, WA
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Title:   Author  item
                                            Coyne, Clarice

                                                         - *Clare*item
                                            Porter, Lyndonitem
                                            INGLIS, D - NWWR & EXT CTR WSU MT VERitem
                                            Grunwald, Niklaus

                                                         - *Nik*item
                                            McPhee, Kevinitem
                                            Muehlbauer, Frederick
  Submitted to: Journal of Plant Registrations
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 3/6/2008
                                    Publication  Date: 3/26/2008
                                    Citation: Coyne, C.J., Porter, L., Inglis, D.A., Grunwald, N.J., Mcphee, K.E., Muehlbauer, F.J. 2008. Registration of W6 26740, W6 26743 and W6 26745 Green Pea Germplasm Resistant to Fusarium Root Rot. Journal of Plant Registrations (2008) Vol 2, No. 2, 137-139.Interpretive Summary: Fusarium root rot, caused by the fungus Fusarium solani, is the second most important root rotting pathogen of pea in the USA.  Genetic resistance combined with crop rotation can provide producers with economic control to this disease.  We are releasing three lines with improved partial resistance to Fusarium root rot with improved agronomic traits.  These lines are unique in combining high levels of partial resistance to Fusarium root rot [Fusarium solani (Mart.) Sacc.f. sp. pisi (F.R. Jones) W.C. Snyder & H.N. Hans.] with acceptable agronomic traits and will be useful as a resource for developing root rot resistant pea cultivars.
                                Technical Abstract: Three F8–derived breeding lines W6 26740, W6 26743, and W6 26746 of green pea (Pisum sativum L.) were selected from a recombinant inbred line population developed by the USDA Agricultural Research Service in 2002.  These lines are unique in combining high levels of partial resistance to Fusarium root rot [Fusarium solani (Mart.) Sacc. f. sp. pisi (F.R. Jones) W.C. Snyder & H.N. Hans.] with acceptable agronomic traits, and 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 (Kraft 1992) 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 1950’s as a source of resistance to Fusarium wilt race 1 [caused by Fusarium 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 (Kraft 1992).  This line has partial resistances to Aphanomyces root rot (caused by Aphanomyces euteiches Drechs.), Fusarium root rot, and Fusarium wilt races 1, 5 and 6 (Haglund & Kraft, 2001).   The expected use of W6 26740, W6 26743 and W6 26746 are as parental lines to develop cultivars with improved disease resistance primarily to Fusarium root rot.


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