TITLE

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

AUTHOR(S)
Lixia Li; Yujie Luo; Biyun Chen; Kun Xu; Fugui Zhang; Hao Li; Qian Huang; Xin Xiao; Tianyao Zhang; Jihong Hu; Feng Li; Xiaoming Wu
PUB. DATE
September 2016
SOURCE
Frontiers in Plant Science;9/30/2016, Vol. 7, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
118521896

 

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