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Mapping of a QTL with major effect on reducing leaf rust severity at the adult plant growth stage on chromosome 2BL in wheat landrace Hongmazha

文献类型： 外文期刊

作者： Zhang, Yibin 1 ; Wang, Zhen 1 ; Quan, Wei 2 ; Zhang, Xiang 3 ; Feng, Jing 4 ; Ren, Junda 5 ; Jiang, Xu 1 ; Zhang, Zhongju 1 ;

作者机构： 1.China Agr Univ, Dept Plant Pathol, Beijing 100193, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Engn & Tech Res Ctr Hybrid Wheat, Beijing 100097, Peoples R China

3.Natl Fisheries Technol Extens Ctr, Beijing 100125, Peoples R China

4.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China

5.Beijing Agr Univ, Minist Agr & Rural Affairs, Key Lab Northern Urban Agr, Beijing 102206, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2021 年 134 卷 5 期

页码：

收录情况： SCI

摘要： Key message A major QTL (QLr.cau-2BL) for APR to leaf rust was detected on 2BL; an SSR marker was developed to closely link with QLr.cau-2BL and validated for effectiveness of MAS. The wheat landrace Hongmazha (HMZ) possesses adult plant resistance (APR) to leaf rust. To detect and validate quantitative trait locus (QTL) for the APR, four wheat populations were assessed for leaf rust severity in a total of eight field and greenhouse experiments. The mapping population Aquileja x HMZ (120 recombinant inbred lines, RILs) was genotyped using 90 K SNP markers. A major QTL (QLr.cau-2BL) was detected between the markers IWB3854 and IWB21922 on chromosome 2BL. IWB3854 and IWB21922 were positioned at approximately 531.14 Mb and 616.48 Mb, respectively, on 2BL of IWGSC RefSeq v1.0 physical map. Based on the sequences between 531.14 and 616.48 Mb on 2BL of IWGSC RefSeq v1.0, 415 simple sequence repeat (SSR) markers were developed. These markers and 28 previously published SSR makers were screened; the resulted polymorphic markers were used to genotype the relatively larger population RL6058 x HMZ (371 RILs). QLr.cau-2BL was mapped within a 1.5 cM interval on 2BL map of RL6058 x HMZ, and a marker (Ta2BL_ssr7) was identified to closely link with QLr.cau-2BL. Effectiveness of selection for QLr.cau-2BL based on Ta2BL_ssr7 was validated using two populations (RL6058 x HMZ F-2:3 and Jimai22 x HMZ BC4F2:3). In addition, polymorphism at Ta2BL_ssr7 was detected among a panel of 282 commercial wheat cultivars. We believe, therefore, that Ta2BL_ssr7 should be useful for introducing QLr.cau-2BL into commercial wheat cultivars and for accumulating QLr.cau-2BL with other APR QTL.

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