Molecular mapping of stripe rust resistance gene YrJ22 in Chinese wheat cultivar Jimai 22
文献类型: 外文期刊
第一作者: Chen, Can
作者: Chen, Can;Ma, Chuanxi;He, Zhonghu;Lu, Jialing;Li, Jia;Ren, Yan;Xia, Xianchun;Ren, Yan;He, Zhonghu
作者机构:
关键词: Genetic mapping;Puccinia striiformis;SNP;SSR;Triticum aestivum
期刊名称:MOLECULAR BREEDING ( 影响因子:2.589; 五年影响因子:2.75 )
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收录情况: SCI
摘要: Stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is an important disease of wheat worldwide. Host resistance is the best way to control the disease. Genetic analysis of F-2 and F-2:3 populations from an Avocet S/Jimai 22 cross indicated that stripe rust resistance in Jimai 22 was conferred by a single dominant gene, tentatively designated YrJ22. A total of 377 F-2 plants and 127 F-2:3 lines were tested with Chinese Pst race CYR32 and genotyped with simple sequence repeat (SSR) and single nucleotide polymorphism (SNP) markers. A linkage map was constructed with five SSR and two SNP markers. Xwmc658 and IWA1348 flanked YrJ22 at genetic distances of 1.0 and 7.3 cM, proximally and distally, respectively. The chromosomal location was confirmed using Chinese Spring nulli-tetrasomic, ditelosomics and deletion lines. Seedling reactions to 21 Pst races demonstrated differences in specificity between YrJ22 and other resistance genes on chromosome 2AL, indicating that YrJ22 is likely to be a new wheat stripe rust resistance gene.
分类号: Q94
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