Uncovering genomic and transcriptional variations facilitates utilization of wild resources in cotton disease resistance improvement

文献类型： 外文期刊

第一作者： Zhang, Yihao

作者： Zhang, Yihao;Zhang, Yaning;Gao, Chenxu;Hu, Wei;Li, Fuguang;Yang, Zhaoen;Zhang, Yihao;Zhang, Zhibin;Yuan, Yuan;Zeng, Xiaolin;Yang, Lan;Li, Fuguang;Yang, Zhaoen

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2023 年 136 卷 9 期

页码：

收录情况： SCI

摘要： BackgroundUpland cotton wild/landraces represent a valuable resource for disease resistance alleles. Genetic differentiation between genotypes, as well as variation in Verticillium wilt (VW) resistance, has been poorly characterized for upland cotton accessions on the domestication spectrum (from wild/landraces to elite lines).ResultsTo illustrate the effects of modern breeding on VW resistance in upland cotton, 37 wild/landraces were resequenced and phenotyped for VW resistance. Genomic patterns of differentiation were identified between wild/landraces and improved upland cotton, and a significant decline in VW resistance was observed in association with improvement. Four genotypes representing different degrees of improvement were used in a full-length transcriptome analysis to study the genetic basis of VW resistance. ROS signaling was highly conserved at the transcriptional level, likely providing the basis for VW resistance in upland cotton. ASN biosynthesis and HSP90-mediated resistance moderated the response to VW in wild/landraces, and loss of induction activity of these genes resulted in VW susceptibility. The observed genomic differentiation contributed to the loss of induction of some important VW resistance genes such as HSP90.4 and PR16.ConclusionsBesides providing new insights into the evolution of upland cotton VW resistance, this study also identifies important resistance pathways and genes for both fundamental research and cotton breeding.

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