Molecular mapping of stripe rust resistance gene YrSN104 in Chinese wheat line Shaannong 104

被引:8
作者
Asad, Muhammad Azeem [1 ]
Xia, Xianchun [1 ]
Wang, Chengshe [2 ]
He, Zhonghu [1 ,3 ]
机构
[1] Chinese Acad Agr Sci, Inst Crop Sci, Natl Wheat Improvement Ctr, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100193, Peoples R China
[2] NW A&F Univ, Coll Agron, Yangling, Shaanxi, Peoples R China
[3] CAAS, Int Maize & Wheat Improvement Ctr CIMMYT, China Off, Beijing 100193, Peoples R China
来源
HEREDITAS | 2012年 / 149卷 / 04期
基金
美国国家科学基金会;
关键词
ADULT-PLANT RESISTANCE; F-SP TRITICI; LEAF RUST; MICROSATELLITE MARKERS; DIVERSITY; LINKAGE; YR24; YR15; SSR; MAP;
D O I
10.1111/j.1601-5223.2012.02261.x
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is a serious yield-limiting factor for wheat production worldwide. The objective of this study was to identify and map a stripe rust resistance gene in wheat line Shaannong 104 using SSR markers. F1, F2 and F3 populations from Shaannong 104/Mingxian 169 were inoculated with Chinese Pst race CYR32 in a greenhouse. Shaannong 104 carried a single dominant gene, YrSN104. Six potential polymorphic SSR markers identified in bulk segregant analysis were used to genotype F2 and F3 families. YrSN104 was closely linked with all six SSR markers on chromosome 1BS with genetic distances of 2.0 cM (Xgwm18, Xgwm273, Xbarc187), 2.6 cM (Xgwm11, Xbarc137) and 5.9 cM (Xbarc240). Pedigree analysis, pathogenicity tests using 26 Pst races, haplotyping of associated markers on isogenic lines carrying known stripe rust resistance genes, and associations with markers suggested that YrSN104 was a new resistance gene or an allele at the Yr24/Yr26 locus on chromosome 1BS. Deployment of YrSN104 singly or in combination to elite genotypes could play an effective role to lessen yield losses caused by stripe rust.
引用
收藏
页码:146 / 152
页数:7
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