【摘要】 文章对禾本科小麦族猬草属及其近缘属Thinopyrum(Eb)、Lophopyrum(Ee)、拟鹅观草属(St)、新麦草属(Ns)、大麦属(H)、赖草属(NsXm)和披碱草属(StH)植物共23个类群的单拷贝核Pgk1基因序列进行系统发育分析,探讨猬草属及其近缘属植物的系统发育关系。序列分析发现Pgk1基因序列在L.arenarius和Psa.juncea中有81bp的Stowaway家族DNA转座元件插入,而在Hy.duthiei、Hy.duthieissp.longearistata和L.akmolinensis中有29bp Copia家族的反转录转座元件插入。最大似然和贝叶斯推断进行的系统发育分析表明:(1)猬草属模式种Hy.patula与披碱草属、拟鹅观草属和大麦属具有密切的亲缘关系;(2)猬草属的其他物种Hy.duthiei、Hy.duthieissp.longearistata、Hy.coreana和Hy.komarovii与新麦草属和赖草属植物亲缘关系密切。研究结果支持将Hy.patula从猬草属组合到披碱草属中,而Hy.duthiei、Hy.duthieis sp.longearistata、Hy.coreana和Hy.komarovii应组合到赖草属中。更多还原

【Abstract】 To estimate the phylogenetic relationships between Hystrix and its related genera (Poaceae:Triticeae), the sequences of the single-copy nuclear gene Pgk1 were analyzed for five Hystrix taxa, together with three Pseudoroegneria (St) species, two Hordeum (H) species, two Psathyrostachys (Ns) species, four Elymus (StH) species, five Leymus (NsXm) species, Thinopyrum bessarabicum (Eb), and Lophopyrum elongatum (Ee). Sequence analysis indicated that an 81bp Stowaway insertion occurred in the Pgk1 sequences of L. arenarius and Psa. juncea, and a 29 bp Copia insertion occurred in the Pgk1 sequences of Hy. duthiei, Hy. duthiei ssp. longearistata and L. akmolinensis. Phylogenetic analysis indicated that: (1) Hy. patula was closely related to Pseudoroegneria, Hordeum, and Elymus; (2) Hy. duthiei, Hy. duthiei ssp. longearistata, Hy. coreana, and Hy. komarovii were closely related to Psathyrostachys and Leymus. Based on these results, it is reasonable to transfer Hy. patula from Hystrix to Elymus, and to combine Hy. duthiei, Hy. duthiei ssp. longearistata, Hy. coreana, and Hy. komarovii into Leymus.更多还原