A Genome-Wide Association Study Reveals New Loci for Resistance to Clubroot Disease in Brassica napus

文献类型： 外文期刊

第一作者： Li, Lixia

作者： Li, Lixia;Luo, Yujie;Chen, Biyun;Xu, Kun;Zhang, Fugui;Li, Hao;Huang, Qian;Xiao, Xin;Zhang, Tianyao;Hu, Jihong;Li, Feng;Wu, Xiaoming

作者机构：

关键词： Brassica napus L.;Plasmodiophora brassicae;clubrootresistance;genome wide association study;candidate gene prediction

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2016 年 7 卷

页码：

收录情况： SCI

摘要： Rapeseed (Brassica napus L.) is one of the most important oil crops in the world. However, the yield and quality of rapeseed were largely decreased by clubroot (Plasmodiophora brassicae Woronin). Therefore, it is of great importance for screening more resistant germplasms or genes and improving the resistance to P. brassicae in rapeseed breeding. In this study, a massive resistant identification for a natural global population was conducted in two environments with race/pathotype 4 of P brassicae which was the most predominant in China, and a wide range of phenotypic variation was found in the population. In addition, a genome-wide association study of 472 accessions for clubroot resistance (CR) was performed with 60K Brassica Infinium SNP arrays for the first time. In total, nine QTLs were detected, seven of which were novel through integrative analysis. Furthermore, additive effects in genetic control of CR in rapeseed among the above loci were found. By bioinformatic analyses, the candidate genes of these loci were predicted, which indicated that TIR-NBS gene family might play an important role in CR. It is believable that the results presented in our study could provide valuable information for understanding the genetic mechanism and molecular regulation of CR.

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