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Phylogeography of <italic>Eomecon chionantha</italic> in subtropical China: the dual roles of the Nanling Mountains as a glacial refugium and a dispersal corridor.
- Source :
-
BMC Evolutionary Biology . 2/9/2018, Vol. 18, p1-1. 1p. - Publication Year :
- 2018
-
Abstract
- Background: Mountains have not only provided refuge for species, but also offered dispersal corridors during the Neogene and Quaternary global climate changes. Compared with a plethora of studies on the refuge role of China’s mountain ranges, their dispersal corridor role has received little attention in plant phylogeographic studies. Using phylogeographic data of <italic>Eomecon chionantha</italic> Hance (Papaveraceae), this study explicitly tested whether the Nanling Mountains, which spans from west to east for more than 1000 km in subtropical China, could have functioned as a dispersal corridor during the late Quaternary in addition to a glacial refugium. Results: Our analyses revealed a range-wide lack of phylogeographic structure in <italic>E. chionantha</italic> across three kinds of molecular markers [two chloroplast intergenic spacers, nuclear ribosomal internal transcribed spacer (nrITS), and six nuclear microsatellite loci]. Demographic inferences based on chloroplast and nrITS sequences indicated that <italic>E. chionantha</italic> could have experienced a strong postglacial range expansion between 6000 and 1000 years ago. Species distribution modelling showed that the Nanling Mountains and the eastern Yungui Plateau were the glacial refugia of <italic>E. chionantha</italic>. Reconstruction of dispersal corridors indicated that the Nanling Mountains also have acted as a corridor of population connectivity for <italic>E. chionantha</italic> during the late Quaternary. Conclusions: Our results suggest that the Nanling Mountains may acted dual roles as a dispersal corridor in east-west direction and as a glacial refugium in subtropical China during the late Quaternary. The population connectivity mediated by the mountain range and a strong postglacial range expansion are the most likely reasons for the lack of phylogeographic structure in <italic>E. chionantha.</italic> The hypothesis of dual roles of the mountain range presented here sheds new insights into the phylogeographic patterns of organisms in subtropical China. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ANGIOSPERMS
*PLANT phylogeny
*PHYLOGEOGRAPHY
*NEOGENE Period
*GLACIAL Epoch
Subjects
Details
- Language :
- English
- ISSN :
- 14712148
- Volume :
- 18
- Database :
- Academic Search Index
- Journal :
- BMC Evolutionary Biology
- Publication Type :
- Academic Journal
- Accession number :
- 127915905
- Full Text :
- https://doi.org/10.1186/s12862-017-1093-x