Molecular phylogeny and biogeography of Erithalis (Rubiaceae), an endemic of the Caribbean Basin

被引：37

作者：

Negrón-Ortiz, V ^{[1
]}

Watson, LE ^{[1
]}

机构：

[1] Miami Univ, Dept Bot, Oxford, OH 45056 USA

来源：

PLANT SYSTEMATICS AND EVOLUTION | 2002年 / 234卷 / 1-4期

关键词：

Rubiaceae; Chiococceae; Erithalis; ETS; ITS; trnF-trnL intergenic spacer; phylogeny; Caribbean biogeography;

D O I：

10.1007/s00606-002-0192-2

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Erithalis consists of 8-10 species endemic to the Caribbean Basin. DNA sequences of chloroplast (trnF-trnL) and nuclear non-coding spacers (ITS and ETS) indicate that Erithalis is monophyletic. ETS was the most informative marker, resolving some interspecific relationships. Analyses of the combined data revealed two weakly supported clades: one composed of E. fruticosa and E. harrisii, and a sister clade of the remaining species. Since fossil records indicate the presence of Erithalis-like pollen from the Eocene Gatuncillo Formation of Panama, it is possible that an initial colonization may have been from Central America. Through trans-oceanic dispersal, most likely by birds, Erithalis colonized the Caribbean islands. Some of the inter-island colonizations were accompanied by speciation and low molecular divergence, supporting a recent radiation across these islands.

引用

页码：71 / 83

页数：13