Phylogenetics of Bauhinia Subgenus Phanera (Leguminosae:Caesalpinioideae) Based on ITS Sequences of Nuclear Ribosomal DNA

泛熱帶分佈的豆科羊蹄甲屬目前分篇4個亞屬。約含巧150種的顯托亞屬是其中最大的亞屬。本文報導了對磚38個種類應用ITS匾段序列資料進行系統發育分析的結果，其中包括羊蹄甲屬全部4個亞屬、顯托亞屬11 個組中的9個組的代表。解析度很高的嚴格一致性分支固表明顯托亞屬和含罩一種類的Backlya亞屬一起構成一個單系群。在該單系群中，非洲的種類(Tvlosema 組)、美洲的種類(Caulotretus組)、和大洋州的種類(Barklya亞屬、顯托亞屬的Lvsiphyllum組)是依次最先分支出來的，而亞洲的類群(Lvsiphyllum組的種類除外)形成一個單系。分支固還表明，顯托組和厚盤組不是單系類群。為系統發育分析結果所支援的單系類群包括顯托組內的黃毛羊蹄甲系(Ser.Fulvae)和傘房花序系(Ser.Corymbosae)，筒莒萼組 (sect.Tubicalvx)、以及亞洲一大洋州的Lvsiphyllum組。

關鍵字

羊蹄甲屬；雲實亞科； ITS ；豆科；系統發育分析；顯托亞屬

並列摘要

The pantropical legume genus Bauhinia is currently subdivided into four subgenera Subgenus Phanera, with ca 150 species, is the largest. A parsimony analysis was conducted on ITS sequence data from 38 species. With representatives from all four subgenera. and species sampled from nine of 11 sections of subgen Phanera, and including two Cercis species as the outgroup The well-resolved strict consensus tree suggests that subgen Phanera and the monotypic subgen Barklya together form a monophyletic group In the Phanera-Barklya dade, the African (sect Tylo5erna), American (sect. Canlotretu5), and Australasian (subgen Barklya. Subgen Phanera sect Lysiphyllnrn) species are the first (paraphyletic) lineages. while the Asian taxa (except species of sect Lysiphyllurn) form a monophyletic group The ITS tree also revealed that sects Phanera and La5ioberna are not monophyletic Monophyletic groups supported by the phylogenetic analysis include ser Fulvae and ser Colyrnbo5ae of sect Phanera, sect Tubicalyx, and the Asian-Australasian sect Lysiphyllurn.

並列關鍵字

Bauhinia ； Caesalpinioideae ； ITS ； Leguminosae ； Phylogenetic analysis ； subgen Phanera

國際替代計量

Phylogenetics of Bauhinia Subgenus Phanera (Leguminosae:Caesalpinioideae) Based on ITS Sequences of Nuclear Ribosomal DNA

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