Genome sequence of Gossypium anomalum facilitates interspecific introgression breeding

文献类型： 外文期刊

第一作者： Xu, Zhenzhen

作者： Xu, Zhenzhen;Meng, Shan;Xu, Peng;Zhai, Caijiao;Huang, Fang;Guo, Qi;Zhao, Liang;Shangguan, Yixin;Zhang, Xianggui;Zhao, Jun;Xu, Jianwen;Liu, Jianguang;Gao, Jin;Ni, Wanchao;Chen, Xianglong;Ji, Wei;Wang, Nanyi;Lu, Xiaoxi;Shen, Xinlian;Chen, Jiedan;Zhang, Tianzhen;Quan, Yonggang;Wen, Tian;Wang, Shihong;Meng, Zhuang;Zhang, Ya;Ji, Wei;Lu, Xiaoxi;Wang, Kai

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关键词： wild diploid species; Gossypium anomalum; genome; chromosome segment substitution lines; drought tolerance; fiber strength

期刊名称：PLANT COMMUNICATIONS （ 影响因子：8.625； 五年影响因子：8.625 ）

ISSN： 2590-3462

年卷期： 2022 年 3 卷 5 期

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收录情况： SCI

摘要： Crop wild relatives are an important reservoir of natural biodiversity. However, incorporating wild genetic diversity into breeding programs is often hampered by reproductive barriers and a lack of accurate genomic information. We assembled a high-quality, accurately centromere-anchored genome of Gossypium anomalum, a stress-tolerant wild cotton species. We provided a strategy to discover and transfer agronomically valuable genes from wild diploid species to tetraploid cotton cultivars. With a (Gossypium hirsutum 3 G. anomalum)2 hexaploid as a bridge parent, we developed a set of 74 diploid chromosome segment substitution lines (CSSLs) of the wild cotton species G. anomalum in the G. hirsutum background. This set of CSSLs included 70 homozygous substitutions and four heterozygous substitutions, and it collectively contained about 72.22% of the G. anomalum genome. Twenty-four quantitative trait loci associated with plant height, yield, and fiber qualities were detected on 15 substitution segments. Integrating the reference genome with agronomic trait evaluation of the CSSLs enabled location and cloning of two G. anomalum genes that encode peroxiredoxin and putative callose synthase 8, respectively, conferring drought tolerance and improving fiber strength. We have demonstrated the power of a high-quality wild-species reference genome for identifying agronomically valuable alleles to facilitate interspecific introgression breeding in crops.

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