1. Molecular phylogeny of RNA polymerase II gene reveals the relationships of tetraploid species with St genome (Triticeae: Poaceae)
- Author
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Jin-Qiu liao, Xiao-Li Wang, Lina Sha, Haiqin Zhang, Xing Fan, Houyang Kang, Yonghong Zhou, and Jing Liu
- Subjects
Genetics ,Nuclear gene ,biology ,Phylogenetic tree ,Phylogenetics ,Molecular phylogenetics ,Elytrigia ,Elymus ,biology.organism_classification ,Triticeae ,Biochemistry ,Genome ,Ecology, Evolution, Behavior and Systematics - Abstract
To evaluate phylogeny of tetraploid with St genome, phylogenetic analyses of RNA polymerase II ( RPB 2), a member of the nuclear gene family encoding the second largest subunit, were performed. Our results showed that: (1) Roegneria magnicaespes and Roegneria alashanica are related to Pseudoroegneria . (2) Roegneria elytrigioides has StStStSt genomes and should therefore be classified as Pseudoroegneria elytrigioides . (3) Pseudoroegneria tauri and Pseudoroegneria deweyi which have StStPP genomes should be transferred to Douglasdeweya and be renamed as Douglasdeweya wangii and Douglasdeweya deweyi , respectively. (4) Pseudoroegneria geniculata ssp. scythica is related to Pseudoroegneria and Lophyrum , and hence should be identified as a species of Trichopyrum . (5) Pseudoroegneria libanotica might be a parental donor for Elytrigia caespitosa rather than Elytrigia caespitosa ssp. nodosa . It is unreasonable to recognize El. caespitosa ssp. nodosa as a subspecies of El . caespitosa . (6) Interspecific and intergeneric variations are detected in St genome of these tetraploid species.
- Published
- 2011
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