Identification and fine mapping of a new bacterial blight resistance gene, Xa43(t), in Zhangpu wild rice (Oryza rufipogon)

文献类型： 外文期刊

第一作者： Huang, F.

作者： Huang, F.;He, N.;Yu, M.;Yang, D.;Li, D.

作者机构：

关键词： Bacterial blight (BB) resistance; chromosome segment substitution line (CSSL); fine mapping; Rice; ZhangPu wild rice

期刊名称：PLANT BIOLOGY （ 影响因子：3.9； 五年影响因子：3.6 ）

ISSN： 1435-8603

年卷期： 2023 年 25 卷 3 期

页码：

收录情况： SCI

摘要： Bacterial blight (BB) is currently considered one of the most serious rice diseases and is caused by Xanthomonas oryzae pv. oryzae (Xoo). Numerous studies have shown that breeding resistant rice varieties is one of the most effective methods to prevent BB, and it is important to identify and isolate more BB resistance (R) genes from different rice resources.Using a map-based approach, we identified a new QTL/gene, Xa43(t), from ZhangPu wild rice, which was highly resistant to the BB isolate PX099. We performed bulked segregant analysis combined with candidate gene prediction to identify the candidate gene.The Xa43(t) gene was narrowed down to a 29-kb region containing four putative genes. More importantly, the candidate gene Xa43(t) did not affect the main agronomic traits of rice. We also identified a widely applicable molecular marker, namely Inde1-18, which co-segregates with the Xa43(t) gene.The Xa43(t) gene is a new broad-spectrum BB resistance gene without identified alleles and has good application prospects for rice disease resistance breeding.

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