Phylogeny of Echiochilon (Echiochileae, Boraginaceae) based on ITS sequences and morphology

被引:21
作者
Långström, E [1 ]
Oxelman, B [1 ]
机构
[1] Univ Uppsala, Dept Syst Bot, Evolut Biol Ctr, Uppsala, Sweden
关键词
antiphytum; biogeography; Boraginaceae; Echiochilon; floral morphology; ITS; Ogastemma; phylogeny;
D O I
10.2307/3647347
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
A phylogenetic analysis of Echiochilon and representatives of Antiphytum and Ogastemma based on nuclear internal transcribed spacer (ITS) sequences of the ribosomal DNA indicated that zygomorphy is the plesiomorphic condition in Echiochilon. Antiphytum and Ogastemma were resolved as sister taxa, together forming the sister group to Echiochilon. An analysis based on morphological data mainly corroborates the ITS phylogeny, with a notable exception concerning the position of the actinomorphic-flowered E. johnstonii. Biogeographic interpretation of the ITS phylogeny using DIVA (dispersal vicariance analysis) indicated an ancestor to Echiochilon with a wide distribution over northern Africa and Arabia to India.
引用
收藏
页码:725 / 735
页数:11
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