Phylogenetic analysis of <Emphasis Type="Italic">Kengyilia</Emphasis> species based on nuclear ribosomal DNA internal transcribed spacer sequences |
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Authors: | J Zeng L Zhang X Fan H Q Zhang R W Yang Y H Zhou |
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Institution: | 1.Triticeae Research Institute,Sichuan Agricultural University, Dujiangyan,Sichuan,P.R. China;2.Key Laboratory of Crop Genetic Resources and Improvement,Sichuan Agricultural University, Dujiangyan,Sichuan,P.R. China;3.College of Biology and Science,Sichuan Agricultural University, Yaan,Sichuan,P.R. China |
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Abstract: | Phylogenetic analysis was conducted based on sequences of the internal transcribed spacer region (ITS) of nuclear ribosomal
DNA in 17 species of Kengyilia, together with those of 18 species from Pseudoroegneria, Agropyron, Roegneria and Douglasdeweya by the maximum parsimony, maximum likelihood and neighbor-joining distance methods. The results indicate that species of
Kengyilia had close affinities to species of Douglasdeweya and Agropyron. The species in Kengyilia was identified as two subgroups with regard to geographic distribution, indicating that species from the same distribution
had a closer phylogenetic relationship. The genus Kengyilia was found as a ligament-group between Roegneria and Agropyron. The ITS sequence is a useful tool for studying the phylogeny of closely related species. |
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