期刊
MOLECULAR PHYLOGENETICS AND EVOLUTION
卷 61, 期 3, 页码 659-670出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2011.08.005
关键词
AFLP; ITS; Bayesian population analysis; Diaspore traits; Mediterranean Basin; Macaronesian area
资金
- FEDER
- Spanish Ministerio de Ciencia y Tecnologia [CGL2008-02533-E, CGL2009-08178, CGL2005-0195, CGL2008-02531-E, CGL2009-08257]
- Spanish Ministerio de Educacion y Ciencia [BES-2006-13925]
Rumex bucephalophorus is a very polymorphic species that has been subjected to various taxonomic studies in which diverse infraspecific taxa have been recognised on the basis of diaspore traits. In this study we used molecular markers (ITS and AFLP) to explore this remarkable diversity, to test previous hypotheses of classification, and attempt to explain biogeographic patterns. Results show that R. bucephalophorus forms a monophyletic group in which diversification began around 4.2 Mya, at the end of Messinian Salinity Crisis. The two molecular markers clearly show a deep divergence separating subsp. bucephalophorus from all other subspecific taxa, among which subsp. canariensis also constitutes a separate and well distinguishable unit. In contrast, subspecies hispanicus and subsp. gallicus constitute a monophyletic group in which three subgroups can be recognised: subsp. hispanicus, subsp. gallicus var. gallicus and subsp. gallicus var. subaegeus. However, these three subgroups are not clearly distinguished genetically or morphologically, so that in formal classification it would be preferable to treat them at the varietal level. (C) 2011 Elsevier Inc. All rights reserved.
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