title: [Genetic analysis and molecular mapping of stripe rust resistance gene in a restore line of Thermo-Photo sensitive hybrid wheat MR168].
abstract: Stripe rust, caused by Puccinia striiformis f. sp. tritici, is an important limiting factor to popularize hybrid wheat. The objectives of this study were to map a stripe rust resistance gene in a Chinese thermo-photo-sensitive hybrid wheat restore line MR168 using gene postulation and SSR markers. MR168 was highly resistant to 23 Pst races including CYR29, CYR31, CYR32, and CYR33. The populations F1, BC1, F2, and F3 from the cross between MR168 and SY95-71 (a wheat cultivar susceptible to Pst races) were inoculated with the race of Pst CYR32 of China  in greenhouse. MR168 carried a single dominant gene for resistance to CYR32, tentatively designated YrMR168. It originated from Liaochun 10, a spring wheat variety. A total of 183 F2 plants, the resistant and susceptible parents and resistant and susceptible bulks were used for resistance gene mapping with 329 pairs of wheat SSR markers.Five SSR markers on chromosome 1BS including Xgwm18, Xbarc187, Xwmc269, Xgwm273, and Xwmc406 were linked with YrMR168. The resistance gene was closely linked to Xgwm18 and Xbarc187 with the genetic distances of 1.9 and 2.4 cM, respectively. Xgwm18 and Xbarc187 could be used for molecular marker assisted selection of YrMR168 in hybrid wheat breeding program.
authors: Mianyang Academy of Agricultural Sciences, Mianyang, China. rywheat@126.com
authors: Yong
authors: Y
authors: Ren
authors: Sheng-Rong
authors: SR
authors: Li
authors: Jun
authors: J
authors: Li
authors: Qiang
authors: Q
authors: Zhou
authors: Xiao-Ying
authors: XY
authors: DU
authors: Tai-Jun
authors: TJ
authors: Li
authors: Wu-Yun
authors: WY
authors: Yang
authors: You-Liang
authors: YL
authors: Zheng
mesh_terms: D001487:Basidiomycota / Q000502:physiology; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D060467:Disease Resistance; D005819:Genetic Markers; D006824:Hybridization, Genetic; D018895:Microsatellite Repeats; D010935:Plant Diseases / Q000235:genetics* / Q000276:immunology / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D014908:Triticum / Q000235:genetics* / Q000276:immunology / Q000382:microbiology
chemical_list: D005819:Genetic Markers; D010940:Plant Proteins