Subgenome parallel selection is associated with morphotype diversification and convergent crop domestication in Brassica rapa and Brassica oleracea

文献类型： 外文期刊

第一作者： Cheng, Feng

作者： Cheng, Feng;Sun, Rifei;Zhang, Yangyong;Liu, Bo;Liang, Jianli;Zhuang, Mu;Liu, Yunxia;Wang, Xiaobo;Li, Pingxia;Liu, Yumei;Wang, Yan;Wang, Hui;Deng, Jie;Liao, Yongcui;Wei, Keyun;Zhang, Xueming;Fu, Lixia;Hu, Yunyan;Liu, Jisheng;Cai, Chengcheng;Zhang, Shujiang;Zhang, Shifan;Li, Fei;Zhang, Hui;Zhang, Jifang;Guo, Ning;Liu, Zhiyuan;Liu, Jin;Sun, Chao;Ma, Yuan;Zhang, Haijiao;Cui, Yang;Bonnema, Guusje;Wu, Jian;Wang, Xiaowu;Hou, Xilin;Zheng, Hongkun;Liu, Dongyuan;Zhang, Fenglan;Lin, Ke;Bucher, Johan;Zhang, Ningwen;Borm, Theo;Bonnema, Guusje;Freeling, Micheal R.

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

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收录情况： SCI

摘要： Brassica species, including crops such as cabbage, turnip and oilseed, display enormous phenotypic variation. Brassica genomes have all undergone a whole-genome triplication (WGT) event with unknown effects on phenotype diversification. We resequenced 199 Brassica rapa and 119 Brassica oleracea accessions representing various morphotypes and identified signals of selection at the mesohexaploid subgenome level. For cabbage morphotypes with their typical leaf-heading trait, we identified four subgenome loci that show signs of parallel selection among subgenomes within B. rapa, as well as four such loci within B. ateracea. Fifteen subgenome loci are under selection and are shared by these two species. We also detected strong subgenome FiaraIlel selection linked to the domestication of the tuberous morphotypes, turnip (B. rapa) and kohlrabi (B. oleracea). Overall, we demonstrated that the mesohexaploidization of the two Brassica genomes contributed to their diversification into heading and tuber-forming morphotypes through convergent subgenome parallel selection of paralogous genes.

分类号： R394

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