Tribe Fabeae consists of five genera, Lathyrus (160 spp.), Lens (4-6 spp.), Pisum (2-3 spp.), Vavilovia (monotypic), and Vicia (160 spp.), and shows a diversity in stylar features. At least six different stylar types are known in the tribe. In order to reclassify the tribe at the rank of genus, we tried to discover apomorphies in stylar features using a molecular phylogenetic study. We surveyed internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA of representative species, selected from each group having different types of styles in the tribe. We paid particular attention in sampling to members of Vicia section Vicilla, as stylar features are heterogeneous within this section. Consequently, our sample set included 15 species of section Vicilla, 23 species of other Fabeae, and two species of Trifolieae, which were used as a sister group of Fabeae. Based on our analysis, we found that a laterally compressed style and an abaxially tufted hairy style would be advanced against a dorsiventrally compressed style and an evenly hairy style, respectively, in genus Vicia. The species group, which shares the latter apomorphy, is composed of 56 species and was dispersed into 11 sections of two subgenera in the recent system of genus Vicia. We consider future revision of Fabeae should treat this species group as a single higher taxon.
Random amplified polymorphic DNA(RAPD) markers were investigated to clarify, the taxonomic positions of Vicia iinear~folia and V. b~folia, and to assess the genomic diversity among the 9 populations of V. un~iuga, each of which represents a geographical variation or infraspecific taxa in southern Korea. These species are characterized by unijugate leaves in East Asia and have been controversial as to infra-or interspecific classification. The polymorphic markers among the populations examined were observed for fifteen decamer primers. The degree of band sharing was used to calculate genetic similarity between populations, and a phenogram using UPGMA cluster analysis was generated based on the Dice similarity coefficient. The taxa studied were divided into two main groups and the populations of V. unijuga were all grouped together in the phenogram. The genetic similarities of V. unijuga were very high among the populations and did not show distinctions between the infraspecific taxa, although the populations of Mt. Odae and adjacent areas in eastern Korea were differen! from others of the species. V. linearifolia fell within the range of the genomic variation among the populations of V. un~iuga, while V. bifolia was grouped with V. venosa var. cuspidata having muitijugate leaves rather than V. un~]uga. The result from studying RAPD markers suggested that V. linearijolia should be integrated into V. un~]uga and that species with unijugate leaves of V. bifolia and V. un~iuga are polyphyletic.
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