Fine mapping of two recessive powdery mildew resistance genes from Aegilops tauschii accession CIae8
文献类型： 外文期刊
作者： Tang, Xiong 1 ; Dai, Fangxiu 1 ; Hao, Yongli 1 ; Chen, Yiming 1 ; Zhang, Jianpeng 1 ; Wang, Guoqing 1 ; Li, Xingyue 1 ; Peng, Xiaojin 1 ; Xu, Tao 1 ; Yuan, Chunxia 1 ; Sun, Li 1 ; Xiao, Jin 1 ; Wang, Haiyan 1 ; Shi, Wenqi 3 ; Yang, Lijun 3 ; Wang, Zongkuan 1 ; Wang, Xiue 1 ;
作者机构： 1.Nanjing Agr Univ, Coll Agr, Collaborat Innovat Ctr Modern Crop Prod CIC MCP, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing 210095, Jiangsu, Peoples R China
2.Zhongshan Biol Breeding Lab, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China
3.Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Hubei Key Lab Crop Dis, Insect Pests & Weeds Control, Wuhan 430064, Hubei, Peoples R China
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）
ISSN： 0040-5752
年卷期： 2023 年 136 卷 9 期
页码：
收录情况： SCI
摘要： Wheat powdery mildew (Pm), one of the worldwide destructive fungal diseases, causes significant yield loss up to 30%. The identification of new Pm resistance genes will enrich the genetic diversity of wheat breeding for Pm resistance. Aegilops tauschii is the ancestor donor of sub-genome D of hexaploid wheat. It provides beneficial genes that can be easily transferred into wheat by producing synthetic hexaploid wheat followed by genetic recombination. We assessed the Pm resistance level of 35 Ae. tauschii accessions from different origins. Accession CIae8 exhibited high Pm resistance. Inheritance analysis and gene mapping were performed using F-2 and F-2:3 populations derived from the cross between CIae8 and a Pm susceptible accession PI574467. The Pm resistance of CIae8 was controlled by two independent recessive genes. Bulked segregate analysis using a 55 K SNP array revealed the SNPs were mainly enriched into genome regions, i.e. 2DS (13.5-20 Mb) and 7DS (4.0-15.5 Mb). The Pm resistance loci were named as pmAeCIae8_2DS and pmAeCIae8_7DS, respectively. By recombinant screening, we narrowed the pmAeCIae8_2DS into a 370-kb interval flanked by markers CINAU-AE7800 (14.89 Mb) and CINAU-AE20 (15.26 Mb), and narrowed the pmAeCIae8_7DS into a 260-kb interval flanked by markers CINAU-AE58 (4.72 Mb) and CINAU-AE25 (4.98 Mb). The molecular markers closely linked with the resistance loci were developed, and two synthesized hexaploid wheat (SHW) lines were produced. These laid the foundation for cloning of the two resistance loci and for transferring the resistance into common wheat.
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