Genome-Wide Association Study of QTLs Conferring Resistance to Bacterial Leaf Streak in Rice

文献类型： 外文期刊

第一作者： Xie, Xiaofang

作者： Xie, Xiaofang;Zheng, Yan;Liu, Yinsong;Xie, Xiaofang;Zheng, Yan;Hu, Jie;Liu, Yinsong;Guan, Huazhong;Wu, Weiren;Lu, Libin;Guan, Huazhong;Yuan, Jiazheng;Bu, Suhong;Lin, Yanyi

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关键词： rice; bacterial leaf streak; disease resistance; multi-locus GWAS; QTN

期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）

ISSN：

年卷期： 2021 年 10 卷 10 期

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收录情况： SCI

摘要： Bacterial leaf streak (BLS) is a devastating rice disease caused by the bacterial pathogen, Xanthomonas oryzae pv. oryzicola (Xoc), which can result in severe damage to rice production worldwide. Based on a total of 510 rice accessions, trialed in two seasons and using six different multi-locus GWAS methods (mrMLM, ISIS EM-BLASSO, pLARmEB, FASTmrMLM, FASTmrEMMA and pKWmEB), 79 quantitative trait nucleotides (QTNs) reflecting 69 QTLs for BLS resistance were identified (LOD > 3). The QTNs were distributed on all chromosomes, with the most distributed on chromosome 11, followed by chromosomes 1 and 5. Each QTN had an additive effect of 0.20 (cm) and explained, on average, 2.44% of the phenotypic variance, varying from 0.00-0.92 (cm) and from 0.00-9.86%, respectively. Twenty-five QTNs were detected by at least two methods. Among them, qnBLS11.17 was detected by as many as five methods. Most of the QTNs showed a significant interaction with their environment, but no QTNs were detected in both seasons. By defining the QTL range for each QTN according to the LD half-decay distance, a total of 848 candidate genes were found for nine top QTNs. Among them, more than 10% were annotated to be related to biotic stress resistance, and five showed a significant response to Xoc infection. Our results could facilitate the in-depth study and marker-assisted improvement of rice resistance to BLS.

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