The draft genome of a diploid cotton Gossypium raimondii
The draft genome of a diploid cotton Gossypium raimondii
复制标题
DOI：
10.1038/ng.2371
复制
发表时间：
2012-10-01
期刊：
影响因子：
30.8
通讯作者：
Yu, Shuxun
中科院分区：
文献类型：
--
作者：
Wang, Kunbo;Wang, Zhiwen;Yu, Shuxun
我们已经完成了G. raimondii，其祖先是经济上重要的纤维生产棉花物种陆地棉和海岛棉的D亚基因组的假定贡献者。超过73%的组装序列锚定在13 G上。raimondii染色体基因组包含40，976个蛋白质编码基因，其中92.2%通过转录组数据进一步证实。观察到了真双子叶植物共有的六倍化事件以及大约1300 - 2000万年前棉花特异性全基因组复制的证据。我们在G. raimondii基因组中，我们发现大约40%的旁系同源基因存在于1个以上的区块中，这表明该基因组在其进化过程中经历了大量的染色体重排。系统发育分析表明，棉花和可可是唯一一种具有真实的棉酚生物合成CDN 1基因家族的测序植物。
We have sequenced and assembled a draft genome of G. raimondii, whose progenitor is the putative contributor of the D subgenome to the economically important fiber-producing cotton species Gossypium hirsutum and Gossypium barbadense. Over 73% of the assembled sequences were anchored on 13 G. raimondii chromosomes. The genome contains 40,976 protein-coding genes, with 92.2% of these further confirmed by transcriptome data. Evidence of the hexaploidization event shared by the eudicots as well as of a cotton-specific whole-genome duplication approximately 13-20 million years ago was observed. We identified 2,355 syntenic blocks in the G. raimondii genome, and we found that approximately 40% of the paralogous genes were present in more than 1 block, which suggests that this genome has undergone substantial chromosome rearrangement during its evolution. Cotton, and probably Theobroma cacao, are the only sequenced plant species that possess an authentic CDN1 gene family for gossypol biosynthesis, as revealed by phylogenetic analysis.