Title: Phylogeny of <i>Hystrix</i> and related genera (Poaceae: Triticeae) based on nuclear rDNA ITS sequences
Abstract: Abstract The taxonomic status of Hystrix and phylogenetic relationships among Hystrix and its related genera of Pseudoroegneria (St), Hordeum (H), Psathyrostachys (Ns), Elymus (StH), Leymus (NsXm), Thinopyrum bessarabicum (E b ) and Lophopyrum elongatum (E e ) were estimated from sequences of the internal transcribed spacer (ITS) region of nuclear ribosomal DNA. The type species of Hystrix , H. patula , clustered with species of Pseudoroegneria , Hordeum , Elymus , Th. bessarabicum and Lo. elongatum , while H. duthiei ssp. duthiei , H. duthiei ssp. longearistata , H. coreana and H. komarovii were grouped with Psathyrostachys and Leymus species. The results indicate that: (i) H. patula is distantly related to other species of Hystrix , but is closely related to Elymus species; (ii) H. duthiei ssp. duthiei , H. duthiei ssp. longearistata , H. coreana and H. komarovii have a close affinity with Psathyrostachys and Leymus species, and H. komarovii might contain the NsXm genome of Leymus ; and (iii) the St, H and Ns genomes in Hystrix originate from Pseudoroegneria , Hordeum and Psathyrostachys , respectively, while the Xm in Hystrix and Leymus has a complex relationship with the E or St genomes. According to the genomic system of classification in Tiritceae, it is reasonable to treat Hystrix patula as Elymus hystrix L, and the other species of Hystrix as species of a section of Leymus , Leymus Sect. Hystrix .
Publication Year: 2008
Publication Date: 2008-08-07
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 14
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