Genomic insights into the origin, domestication and diversification of Brassica juncea

文献类型： 外文期刊

第一作者： Kang, Lei

作者： Kang, Lei;Qian, Lunwen;Chen, Hao;Yang, Liu;You, Liang;Yang, Bin;Xiong, Xinghua;Liu, Zhongsong;Qian, Lunwen;Zheng, Ming;Hua, Wei;Chen, Liyang;Wang, Tianyi;Lu, Hongfeng;Yang, Bin;Rao, Yong;Xiao, Huagui;Yan, Mingli;Zhang, Dawei;Zhou, Dinggang;Gu, Yuanguo;Jia, Donghai;Wang, Yonggang;Schiessl, Sarah-Veronica;Mason, Annaliese S.;Snowdon, Rod J.;An, Hong;Pires, J. Chris;Blischak, Paul;Liu, Xianjun;Mason, Annaliese S.

作者机构：

期刊名称：NATURE GENETICS （ 影响因子：38.33； 五年影响因子：36.431 ）

ISSN： 1061-4036

年卷期： 2021 年 53 卷 9 期

页码：

收录情况： SCI

摘要： A chromosome-scale de novo assembly of a yellow-seeded Brassica juncea genome and population analyses of 480 accessions from 38 countries provide insights into the origin, domestication history and morphological diversification of B. juncea. Despite early domestication around 3000 BC, the evolutionary history of the ancient allotetraploid species Brassica juncea (L.) Czern & Coss remains uncertain. Here, we report a chromosome-scale de novo assembly of a yellow-seeded B. juncea genome by integrating long-read and short-read sequencing, optical mapping and Hi-C technologies. Nuclear and organelle phylogenies of 480 accessions worldwide supported that B. juncea is most likely a single origin in West Asia, 8,000-14,000 years ago, via natural interspecific hybridization. Subsequently, new crop types evolved through spontaneous gene mutations and introgressions along three independent routes of eastward expansion. Selective sweeps, genome-wide trait associations and tissue-specific RNA-sequencing analysis shed light on the domestication history of flowering time and seed weight, and on human selection for morphological diversification in this versatile species. Our data provide a comprehensive insight into the origin and domestication and a foundation for genomics-based breeding of B. juncea.

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