文献类型： 外文期刊
作者： Kang, Lei 1 ; Qian, Lunwen 1 ; Zheng, Ming 3 ; Chen, Liyang 4 ; Chen, Hao 1 ; Yang, Liu 1 ; You, Liang 1 ; Yang, Bin 1 ; Yan 1 ;
作者机构： 1.Hunan Agr Univ, Coll Agron, Changsha, Peoples R China
2.Hunan Agr Univ, Collaborat Innovat Ctr Grain & Oil Crops South Ch, Changsha, Peoples R China
3.Chinese Acad Agr Sci, Key Lab Biol & Genet Improvement Oil Crops, Oil Crops Res Inst, Minist Agr & Rural Affairs, Wuhan, Peoples R China
4.Novogene Bioinformat Inst, Beijing, Peoples R China
5.Guizhou Acad Agr Sci, Guizhou Inst Oil Crops, Guiyang, Peoples R China
6.Hunan Univ Sci & Technol, Sch Life Sci, Hunan Key Lab Econ Crops Genet Improvement & Inte, Xiangtan, Peoples R China
7.Xinjiang Acad Agr Sci, Urumqi, Peoples R China
8.Justus Liebig Univ Giessen, Dept Plant Breeding, Giessen, Germany
9.Univ Missouri, Div Biol Sci, Columbia, MO 65211 USA
10.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA
11.Yichun Univ, Coll Life Sci Resources & Environm Sci, Yichun, Peoples R China
12.Univ Bonn, Plant Breeding Dept, Bonn, Germany
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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