The genome of the mesopolyploid crop species Brassica rapa
The genome of the mesopolyploid crop species Brassica rapa
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DOI：
10.1038/ng.919
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发表时间：
2011-10-01
期刊：
影响因子：
30.8
通讯作者：
Zhang, Zhonghua
中科院分区：
文献类型：
--
作者：
Wang, Xiaowu;Wang, Hanzhong;Zhang, Zhonghua
本文报道了大白菜芜菁（Brassica rapa accession Chiifu-401-42）基因组序列的注释和分析。我们在B中模拟了41，174个蛋白质编码基因。rapa基因组，经历了基因组三倍。我们使用拟南芥作为外群研究基因组三倍化的后果，如结构和功能进化。三重基因组片段之间的基因丢失（分离）程度各不相同，其中三个拷贝中的一个始终保留了预期存在于其祖先中的基因的不成比例的大部分。芸苔属植物基因组中基因家族成员数目的变异可能是芸苔属植物形态可塑性的重要原因。B。芜菁基因组序列为研究多倍体基因组的进化提供了重要的资源，并为芸苔属油料作物和蔬菜作物的遗传改良奠定了基础。
We report the annotation and analysis of the draft genome sequence of Brassica rapa accession Chiifu-401-42, a Chinese cabbage. We modeled 41,174 protein coding genes in the B. rapa genome, which has undergone genome triplication. We used Arabidopsis thaliana as an outgroup for investigating the consequences of genome triplication, such as structural and functional evolution. The extent of gene loss (fractionation) among triplicated genome segments varies, with one of the three copies consistently retaining a disproportionately large fraction of the genes expected to have been present in its ancestor. Variation in the number of members of gene families present in the genome may contribute to the remarkable morphological plasticity of Brassica species. The B. rapa genome sequence provides an important resource for studying the evolution of polyploid genomes and underpins the genetic improvement of Brassica oil and vegetable crops.