期刊
MOLECULAR PHYLOGENETICS AND EVOLUTION
卷 53, 期 3, 页码 679-693出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2009.07.030
关键词
atp8/trnS; Budding speciation; Coastal biogeographic transition; ITS; Kelp; Phylogeography; RuBisCo spacer; South-east Pacific
资金
- French Ministry of Education and Research (MENRT)
- FONDECYT [1060493]
- ANR-ECOKELP [ANR 06 BDIV 012]
- Master Program Region Metropolitana (Chile)-Region Ile de France (France)
- French Ministry of Foreign Affairs [ECOS-CONICYT C03B04, FONDAP-FONDECYT 1501-0001]
- Laboratoire International Associe Dispersal and Adaptation of Marine Species (LIA DIAMS)
Phylogeographic studies are lacking in the Southern Hemisphere, and in particular in the south-eastern Pacific. To infer the possible scenario for the debated biogeographic transition zone located at 30-33 degrees S along the Chilean coast, we investigated whether there is a concordance between the phylogeographic pattern and the biogeographic transition in the intertidal kelp Lessonia nigrescens; whose distribution is continuous across this transition zone. Using a combination of four makers located in the three genomic compartments (chloroplast, mitochondria and nucleus), we showed the presence of two main divergent lineages, possibly cryptic species. There was an exact match of the phylogeographic break with the 30 degrees S biogeographic transition zone, suggesting a common origin. The combined information given by the multilocus approach and by the population analysis suggested the occurrence of a budding speciation, with a northward range expansion. (C) 2009 Elsevier Inc. All rights reserved.
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