Phylogeny and molecular evolution of the DMC1 gene in the polyploid genus Roegneria and its affinitive genera (Poaceae: Triticeae)
Phylogeny and molecular evolution of the DMC1 gene in the polyploid genus Roegneria and its affinitive genera (Poaceae: Triticeae)
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多倍体鹅观草属及其亲缘属（禾本科：小麦科）DMC1基因的系统发育和分子进化
DOI：
10.1093/botlinnean/box081
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发表时间：
2018-01-01
影响因子：
2.4
通讯作者：
Zhang, Hai-Qin
中科院分区：
文献类型：
--
作者：
Lei, Ying-Xia;Liu, Jia;Zhang, Hai-Qin
鹅观草属是禾本科小麦族多倍体多年生植物的一个大属。关于鹅观草属是否应该被作为一个单独的属或包括在披碱草属中，有不同的意见。探讨鹅观草属(Roegneria spp.)以及可疑鹅观草属的相关属和可能的基因组组成，鹅观草属的减数分裂基因(DMC1)基因序列的系统发育和网络分析。并对相关属的种类进行了研究。ST和H基因组同源类型分别由假鹅观草属(ST基因组)和大麦属(H基因组)组成。Y基因组同源类型独立归类，未发现二倍体种。这些结果表明，Y和ST基因组可能起源于不同的二倍体物种。本文提供的DMC1序列数据为鹅观草属提供了证据。其基因组构成尚不清楚。鹅观草属、中华鹅观草属和苏州鹅观草属似乎含有STY基因组，而斑叶鹅观草可能含有StYH基因组，应转移到Campeiostachys。这些数据表明，将含有STY基因组的物种视为鹅观草属是合理的；含有Sth基因组的物种应被归入披碱草属，而含有StYH基因组的物种应视为Campeiostachys。
Roegneria is a large genus of polyploid perennials in Poaceae tribe Triticeae. There are different opinions regarding whether Roegneria should be treated as a separate genus or included in Elymus. To investigate the phylogenetic relationships among Roegneria spp. and related genera and the possible genomic constitutions of questionable Roegneria spp., phylogenetic and network analyses of disrupted meiotic cDNA (DMC1) gene sequences of Roegneria spp. and species of related genera were carried out in this study. The St and H genome homoeologous types were grouped with the sequences of Pseudoroegneria (St genome) and Hordeum (H genome), respectively. The Y genome homoeologous types were grouped independently, with no diploid species. The results suggested that the Y and St genomes might have originated from distinct diploid species. The DMC1 sequence data presented here provide evidence for those Roegneria spp. for which genome constitutions were unknown. Roegneria serotina, R. sinica and R. schugnanica appear to contain the StY genomes, whereas E. calcicolus might contain the StYH genomes and should be transferred to Campeiostachys. The data indicate that it is reasonable to treat species containing the StY genomes as Roegneria; species with the StH genomes should be included in Elymus and species containing the StYH genomes should be treated as Campeiostachys.