...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biochemical Genetics >Phylogenetic Analysis of Leymus (Poaceae: Triticeae) Inferred from Nuclear rDNA ITS Sequences
【24h】

Phylogenetic Analysis of Leymus (Poaceae: Triticeae) Inferred from Nuclear rDNA ITS Sequences

机译：从核rDNA ITS序列推断的羊草（禾本科）的系统发育分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To investigate the phylogenetic relationships of polyploid Leymus (Poaceae: Triticeae), sequences of the nuclear rDNA internal transcribed spacer region (ITS) were analyzed for 34 Leymus accessions representing 25 species, together with three Psathyrostachys species (Ns genome), two Pseudoroegneria (St genome) species, Lophopyrum elongatum (Ee genome), and Thinopyrum bessarabicum (Eb genome). The phylogenetic analyses (maximum likelihood and Bayesian inference) supported two major clades, one including 21 Leymus species and three Psathyrostachys species, the other with nine Leymus species and four diploid species. The ITS RNA secondary structure of the Leymus species was compared with that of their putative diploid donor. It is suggested that (1) the species from the same areas or neighboring geographic regions are closely related to each other; (2) L. coreanus, L. duthiei, L. duthiei var. longearistatus, and L. komarovii are closely related to other Leymus species, and it is reasonable to transfer these species from the genus Hystrix to Leymus; (3) the ITS sequences of Leymus are evolutionarily distinct; (4) the different Leymus species and different distribution of a species derived their Ns genome from different Psathyrostachys species; and (5) there is a close relationship among Leymus, Pseudoroegneria, Lophopyrum, and Thinopyrum, but it is difficult to presume that the St, Ee, and Eb genome may be the Xm genome donor of the Leymus species.
机译：为了研究多倍体羊草（禾本科：Triticeae）的系统发生关系，分析了核内rDNA内部转录间隔区（ITS）的序列，分析了代表25种的34种羊草，3种沙棘草（Ns基因组），2种假单胞菌（St.基因组）种，长风麦草（E e 基因组）和甜菜镰孢（E b 基因组）。系统发育分析（最大似然和贝叶斯推断）支持两个主要进化枝，一个进化枝包括21个羊草属和3个伞形水草属，另一个包括9个羊草属和4个二倍体。比较了羊草属物种的ITS RNA二级结构与其推定的二倍体供体的结构。建议（1）来自同一地区或相邻地理区域的物种彼此密切相关； （2）L. coreanus，L。duthiei，L。duthiei var。 longearistatus和L. komarovii与其他羊草种类密切相关，将这些种类从Hystrix属转移到羊草是合理的； （3）羊草的ITS序列在进化上是不同的； （4）不同的羊草种类和不同的分布，是由不同的沙生水杨属植物物种获得的Ns基因组； （5）羊草，假单胞菌属，恶风菌和Thinopyrum之间存在密切的关系，但很难推测St，E e 和E b 基因组可能是羊草物种的Xm基因组供体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号