Released germplasm
Hard White Spring Wheats
PI 603919 (UCRBW98-2)
Developers: Lukaszewski A.J., Porter D.R., Antonelli E.F., Dubcovsky J.
Reference: Registration of UCRBW98-1 and UCRBW98-2 wheat germplasms with leaf rust and Greenbug resistance genes. Crop Science, 2000, 40(2):590.
Pedigree: Pavon *8 // T7AS-7AL-7S # 1L / T7AS-7S # 1S-7S # 1L-7AL
Main features: UCRBW98-2 is a hard white spring wheat. Two segments from chromosome 7S#1 of Triticum speltoides were transferred to chromosome 7A of hexaploid wheat (T. aestivum). Chromosome 7S#1 was originally found in bread wheat following irradiation of seed of a hybrid CI15092 / T. speltoides // Fletcher / 3 / 5*Centruk with fast neutrons. Chromosome 7S#1 was recombined with chromosome 7A in hard white spring cultivar Pavon using the ph1b mutation and Sears' strategy. Three additional backcrosses to Pavon were made and homozygotes selected. This long arm translocation line carries gene Gb5 that confers resistance to greenbug (Schizaphis graminum) biotypes C, E, I, and K but not to biotypes B, F, G, H. This 7S#1 segment is 40 to 50 cM long and is located 18 to 22 cM from the centromere of chromosome 7AL.
Seed request: Check first seed availability at GRIN. PI 603919. In case seed is not available from GRIN, direct your written request to the breeder, Adam J. Lukaszewski.
PI 603918 (UCRBW98-1)
Developers: Lukaszewski A.J., Porter D.R., Antonelli E.F., Dubcovsky J.
Reference: Registration of UCRBW98-1 and UCRBW98-2 wheat germplasms with leaf rust and Greenbug resistance genes. Crop Science, 2000, 40(2):590.
Pedigree: Pavon*8 // T7AS-7S # 1S-7S # 1S / ph1b
Main features: UCRBW98-1 is a hard white spring wheat. Two segments from chromosome 7S#1 of Triticum speltoides were transferred to chromosome 7A of hexaploid wheat (T. aestivum). Chromosome 7S#1 was originally found in bread wheat following irradiation of seed of a hybrid CI15092 / T. speltoides // Fletcher / 3 / 5*Centruk with fast neutrons. Chromosome 7S#1 was recombined with chromosome 7A in hard white spring cultivar Pavon using the ph1b mutation and Sears' strategy. Three additional backcrosses to Pavon were made and homozygotes selected. This short arm translocation line carries resistance gene Lr47 for leaf rust (Puccinia recondita). This gene confers resistance to nine leaf rust races that are virulent on resistance genes Lr1 and Lr10 present in the recurrent variety Pavon. This 7S#1 segment is located 2 to 10 cM from the centromere and is 20 to 30 cM long.
Seed request: Check first seed availability at GRIN. PI 603918. In case seed is not available from GRIN, direct your written request to the breeder, Adam J. Lukaszewski.
PI 640429, PI 640430, 640431
GRIN record for PI 640429
GRIN record for PI 640430
GRIN record for PI 640431
Developer(s): K. K. Kidwell
Pedigree: BC3F4 line derived from WA007900 *4/4/ WA007900 // Yr5 /6* Avocet /3/ WA007900 // Yr15 /6* Avocet
Main features: Near-isogenic backcross derivative of WA007900 that contains chromosome regions on 2BS from Yr5/6*Avocet and on 1BS from Yr15/6*Avocet that carry stripe rust seedling resistance genes Yr5 and Yr15, respectively. This genotype is expected to confer resistance to known races of stripe rust in North America. Flanking markers Yr5STS-7/8 CAPS DpnII, Xwmc175 and Xbarc167 for Yr5 and Xwgp34, Xgwm934 and Xgwm33 for Yr15 were used via marker-assisted selection to monitor for the presence of these seedling resistance genes during the backcrossing process. SRW05619 is an awned, common semi-dwarf hard white spring wheat with mid-season maturity. It is targeted for production in the intermediate to high rainfall (>400 mm average annual precipitation), non-irrigated wheat production regions of Washington State based on its superior stripe rust resistance.
Seed request: Check first seed availability at GRIN, query with PI 640429, PI 640430 and PI 640431. In case seed is not available from GRIN, direct your written request to the breeder, K. K. Kidwell.