Genome-wide association study discovered candidate genes of Verticillium wilt resistance in upland cotton (Gossypium hirsutum L.)

文献类型: 外文期刊

第一作者: Li, Tinggang

作者: Li, Tinggang;Ma, Xuefeng;Li, Nanyang;Zhou, Lei;Gui, Yuejing;Bao, Yuming;Chen, Jieyin;Dai, Xiaofeng;Liu, Zheng;Han, Huanyong

作者机构:

关键词: cotton;Verticillium wilt;genome-wide association;candidate gene;virus-induced gene silencing (VIGS)

期刊名称:PLANT BIOTECHNOLOGY JOURNAL ( 影响因子:9.803; 五年影响因子:9.555 )

ISSN: 1467-7644

年卷期: 2017 年 15 卷 12 期

页码:

收录情况: SCI

摘要: Verticillium wilt (VW), caused by infection by Verticillium dahliae, is considered one of the most yield-limiting diseases in cotton. To examine the genetic architecture of cotton VW resistance, we performed a genome-wide association study (GWAS) using a panel of 299 accessions and 85630 single nucleotide polymorphisms (SNPs) detected using the specific-locus amplified fragment sequencing (SLAF-seq) approach. Trait-SNP association analysis detected a total of 17 significant SNPs at P<1.17x10(-5) (P=1/85630, -log(10)P=4.93); the peaks of SNPs associated with VW resistance on A10 were continuous and common in three environments (RDIG2015, RDIF2015 and RDIF2016). Haplotype block structure analysis predicted 22 candidate genes for VW resistance based on A10_99672586 with a minimum P-value (-log(10)P=6.21). One of these genes (CG02) was near the significant SNP A10_99672586 (0.26Mb), located in a 372-kb haplotype block, and its Arabidopsis AT3G25510 homologues contain TIR-NBS-LRR domains that may be involved in disease resistance response. Real-time quantitative PCR and virus-induced gene silencing (VIGS) analysis showed that CG02 was specific to up-regulation in the resistant (R) genotype Zhongzhimian2 (ZZM2) and that silenced plants were more susceptible to V.dahliae. These results indicate that CG02 is likely the candidate gene for resistance against V.dahliae in cotton. The identified locus or gene may serve as a promising target for genetic engineering and selection for improving resistance to VW in cotton.

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