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Registration of Idaho Intensive Management Male Sterile Population, Cycle 0, Wheat Germplasm
Author(s) -
Souza E.,
Tyler J. M.,
O'Brien K. M.
Publication year - 1994
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/cropsci1994.0011183x003400040076x
Subject(s) - germplasm , biology , population , crop , horticulture , agronomy , demography , sociology
in the greenhouse indicate that this line is able to tolerate large populations of RWA with low levels of damage. The initial cross was made in 1988; Fi embryos were rescued 15 d after pollination, and plants were regenerated. FI plants were self-fertile. Individual F2 plants were harvested, and a 30-seed sample from each plant was screened for resistance to RWA using standard protocols (1). Fs-derived progeny were tested in the ¥4 and Fs generations, and only those lines appearing homogeneous resistant were advanced. Final Fs selections were based on height and days to maturity. STARS9302W is a composite of 21 homozygous resistant Fs^ lines; STARS-9303 W is a composite of 13 homozygous resistant F3:6 lines. In the greenhouse, STARS-9302W is =80 cm in height and takes = 75 d to head. STARS-9303W is variable for height and maturity, but averages = 80 cm in height and takes « 90 d to head. Both STARS-9302W and STARS-9303W derive their resistance from P1 149898; both germplasm lines are as resistant as their resistant parent. Analysis of F2 and F3 data indicates that the inheritance of RWA resistance in P1149898 is controlled by at least two genes. These results, along with differential plant response to various biotypes of the aphid (2), indicate that this source of RWA resistance is different from other available RWA-resistant germplasms. When work began with P1 149898, it was listed as a triticale (xTriticosecale Wittmack) on the Germplasm Resources Information Network. This prompted the embryo rescue approach following the initial crosses; however, cytological studies conducted by B. Friebe, Kansas State University at Manhattan, revealed that this plant introduction is a hexaploid wheat and not a triticale. Written requests for small quantities of this germplasm should be sent to the corresponding author. It is requested that appropriate recognition of source of this germplasm be given whenever it is used for research or breeding purposes.