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Registration of GRS1201 Greenbug Multi‐Biotype‐Resistant Wheat Germplasm
Author(s) -
Porter D. R.,
Webster J. A.,
Burton R. L.,
Smith E. L.
Publication year - 1993
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1993.0011183x003300050061x
Subject(s) - germplasm , citation , library science , biology , crop , horticulture , agronomy , computer science
GRS1201, (Reg. no. GP-357, PI 561948) is a multi-biotype greenbug, Schizaphis graminum (Rondani), resistant winter wheat (Triticum aestivum L.) germplasm developed by USDAARS in cooperation with the Oklahoma Agric. Exp. Stn. It was formally released in March 1992. GRS1201 is resistant to biotypes B, C, E, G, and I of the greenbug (1). GRS1201 is a 1AL/1RS wheat/rye (Secale cereale L.) translocation line developed from an alien substitution plant that was derived from a wheat x rye hybrid (short wheat selection/ 'Scout'[TX69A345-2]//'Insave F.A.'). Spikes of the alien substitution plant were irradiated with a total of 7.5 Sv to induce chromosomal breakage and translocation of chromatin. Mature, irradiated pollen of the alien substitution plant was used to pollinate 'TAM W-101' hard red winter wheat. X, (Xn denotes generation following irradiation treatment) plants were selected for self-fertility. Progeny were selfed for seven generations with selection for self-fertility performed for each generation. In the X7 generation, seedlings resistant to greenbug biotype G were identified utilizing standard protocols (2). Further tests revealed that GRS1201 is resistant to biotypes B, C, E, G, (1) and I (D.R. Porter, 1992, unpublished data), but susceptible to F (1) and H (D.R. Porter, 1992, unpublished data). Greenbug resistance of GRS1201 is conditioned by the translocated IRS chromosome arm derived from 'Insave F.A.' rye (D.R. Porter, 1992, unpublished data). Resistance is dominant. GRS1201 is a composite of 40 homozygous resistant X8 lines that were tested in the X9 generation (30 seedlings from each line) to verify homozygous greenbug biotype G resistance. GRS1201 is similar to TAM-W-101 in maturity and height. It also carries stem rust (caused by Puccinia graminis Pers.:Pers.) resistance genes SrS, Sr7b, and 5rl7. GRS1201 is susceptible to the wheat curl mite [Eriophyes tulipae (Keifer)] and powdery mildew (caused by Erysiphe graminis DC f. sp. tritici Em. Marchal). Written requests for small quantities of GRS1201 seed should be sent to the corresponding author. Recognition of origin of this germplasm should be indicated whenever it is used for research or breeding purposes. Seed will be maintained at the Plant Science Research Laboratory, Stillwater, OK.