The internal transcribed spacers (ITS) (including ITS1, 5.8S rRNA gene and ITS2) of Caragana roborovskyi and eight species of subgenus Pogonophace ( Astragalus) were sequenced, and analyzed together with other ITS dat...The internal transcribed spacers (ITS) (including ITS1, 5.8S rRNA gene and ITS2) of Caragana roborovskyi and eight species of subgenus Pogonophace ( Astragalus) were sequenced, and analyzed together with other ITS data (from GenBank) of 48 species representing Astragalus and 12 related genera. The results of phylogenctic analyses suggest that the subgenus Pogonophace is not a monophyletic group. Sect. Sesbanella (Astragalus hoantchy and A. dshimensis) and other species of Pogonophace are nested within different major clades in the phylogenetic tree. The species of sections Bibracteola, Phyllolobium and Trichostylus compose a monophyletic group with a close relationship to subtribe Coluteinae instead of Astragalus. Astragalus tribulifolius and A. tanguticus might be a vicariant species pair as inferred by the ITS data.展开更多
文摘The internal transcribed spacers (ITS) (including ITS1, 5.8S rRNA gene and ITS2) of Caragana roborovskyi and eight species of subgenus Pogonophace ( Astragalus) were sequenced, and analyzed together with other ITS data (from GenBank) of 48 species representing Astragalus and 12 related genera. The results of phylogenctic analyses suggest that the subgenus Pogonophace is not a monophyletic group. Sect. Sesbanella (Astragalus hoantchy and A. dshimensis) and other species of Pogonophace are nested within different major clades in the phylogenetic tree. The species of sections Bibracteola, Phyllolobium and Trichostylus compose a monophyletic group with a close relationship to subtribe Coluteinae instead of Astragalus. Astragalus tribulifolius and A. tanguticus might be a vicariant species pair as inferred by the ITS data.
