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Registration of Zak ERA8 Soft White Spring Wheat Germplasm with Enhanced Response to ABA and Increased Seed Dormancy
Author(s) -
Martinez Shantel A.,
Schramm Elizabeth C.,
Harris Tracy J.,
Kidwell Kimberlee K.,
Garland-Campbell Kimberly,
Steber Camille M.
Publication year - 2014
Publication title -
journal of plant registrations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 21
eISSN - 1940-3496
pISSN - 1936-5209
DOI - 10.3198/jpr2013.09.0060crg
Subject(s) - germplasm , biology , preharvest , germination , dormancy , cultivar , abscisic acid , backcrossing , seed dormancy , sprouting , agronomy , horticulture , postharvest , biochemistry , gene
Zak ERA8 ( E NHANCED R ESPONSE to A BA 8 ) (Reg. No. GP‐966, PI 669443) is a unique line derived from soft white spring wheat ( Triticum aestivum L.) cultivar Zak that has increased seed dormancy but after‐ripens within 10 to 16 wk. The goal in developing this germplasm was to use increased seed dormancy to improve tolerance to preharvest sprouting, a problem that can cause severe economic losses. This germplasm was developed by USDA–ARS, Pullman, WA, in collaboration with Washington State University. Zak ERA8 was tested under experimental number 60.1.27.10. The ERA8 mutation was generated by chemical mutagenesis followed by selection for the inability to germinate on abscisic acid (ABA) concentrations too low to inhibit wild‐type Zak seed germination. The semidominant Zak ERA8 line has been backcrossed twice to wild‐type Zak. Following the first backcross, Zak ERA8 showed similar morphological and grain quality traits to the original Zak cultivar.