Genomic analyses provide comprehensive insights into the domestication of bast fiber crop ramie (Boehmeria nivea)

文献类型： 外文期刊

第一作者： Wang, Yanzhou

作者： Wang, Yanzhou;Li, Fu;He, Qiaoyun;Zeng, Zheng;Yan, Li;Zhu, Siyuan;Liu, Touming;Bao, Zhigui;An, Dong;Zhang, Ting;Wang, Hengyun

作者机构：

关键词： Boehmeria nivea; genome; genomic variation; fiber; domestication

期刊名称：PLANT JOURNAL （ 影响因子：6.486； 五年影响因子：7.666 ）

ISSN： 0960-7412

年卷期： 2021 年 107 卷 3 期

页码：

收录情况： SCI

摘要： Ramie (Boehmeria nivea) is an economically important natural fiber-producing crop that has been cultivated for thousands of years in China; however, the evolution of this crop remains largely unknown. Here, we report a ramie domestication analysis based on genome assembly and resequencing of cultivated and wild accessions. Two chromosome-level genomes representing wild and cultivated ramie were assembled de novo. Numerous structural variations between two assemblies, together with the genetic variations from population resequencing, constituted a comprehensive genomic variation map for ramie. Domestication analysis identified 71 high-confidence selective sweeps comprising 320 predicted genes, and 29 genes from sweeps were associated with fiber growth in the expression. In addition, we identified seven genetic loci associated with the fiber yield trait in the segregated population derived from the crossing of two assembled accessions, and two of which showed an overlap with the selective sweeps. These findings indicated that bast fiber traits were focused on during the domestication history of ramie. This study sheds light on the domestication of ramie and provides a valuable resource for biological and breeding studies of this important crop.

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