| Literature DB >> 27526322 |
Feng Cheng1, Rifei Sun1, Xilin Hou2, Hongkun Zheng3, Fenglan Zhang4, Yangyong Zhang1, Bo Liu1, Jianli Liang1, Mu Zhuang1, Yunxia Liu1, Dongyuan Liu3, Xiaobo Wang1, Pingxia Li1, Yumei Liu1, Ke Lin5, Johan Bucher5, Ningwen Zhang5, Yan Wang1, Hui Wang1, Jie Deng1, Yongcui Liao1, Keyun Wei1, Xueming Zhang1, Lixia Fu1, Yunyan Hu1, Jisheng Liu1, Chengcheng Cai1, Shujiang Zhang1, Shifan Zhang1, Fei Li1, Hui Zhang1, Jifang Zhang1, Ning Guo1, Zhiyuan Liu1, Jin Liu1, Chao Sun1, Yuan Ma1, Haijiao Zhang1, Yang Cui1, Micheal R Freeling6, Theo Borm5, Guusje Bonnema1,5, Jian Wu1, Xiaowu Wang1.
Abstract
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. oleracea. Fifteen subgenome loci are under selection and are shared by these two species. We also detected strong subgenome parallel 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.Entities:
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Year: 2016 PMID： 27526322 DOI： 10.1038/ng.3634
Source DB: PubMed Journal: Nat Genet ISSN： 1061-4036 Impact factor: 38.330