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Climate oscillation during the Quaternary associated with landscape heterogeneity promoted allopatric lineage divergence of a temperate tree Kalopanax septemlobus (Araliaceae) in East Asia
Citation
Sakaguchi, S and Qiu, Y-X and Liu, Y-H and Qi, X-S and Kim, S-H and Han, J and Takeuchi, Y and Worth, JRP and Yamasaki, M and Sakurai, S and Isagi, Y, Climate oscillation during the Quaternary associated with landscape heterogeneity promoted allopatric lineage divergence of a temperate tree Kalopanax septemlobus (Araliaceae) in East Asia, Molecular Ecology, 21, (15) pp. 3823-3838. ISSN 0962-1083 (2012) [Refereed Article]
Copyright Statement
Copyright 2012 Blackwell Publishing Ltd
DOI: doi:10.1111/j.1365-294X.2012.05652.x
Abstract
We investigated the biogeographic history of Kalopanax septemlobus, one of the most
widespread temperate tree species in East Asia, using a combined phylogeographic and
palaeodistribution modelling approach. Range-wide genetic differentiation at nuclear
microsatellites (G'ST = 0.709; 2205 samples genotyped at five loci) and chloroplast DNA
(GST = 0.697; 576 samples sequenced for 2055 bp at three fragments) was high. A major
phylogeographic break in Central China corresponded with those of other temperate
species and the spatial delineation of the two temperate forest subkingdoms of East Asia,
consistent with the forests having been isolated within both East and West China for
multiple glacial–interglacial cycles. Evidence for multiple glacial refugia was found in
most of its current range in China, South Japan and the southernmost part of the Korean
Peninsula. In contrast, lineage admixture and absence of private alleles and haplotypes
in Hokkaido and the northern Korean Peninsula support a postglacial origin of
northernmost populations. Although palaeodistribution modelling predicted suitable
climate across a land-bridge extending from South Japan to East China during the Last
Glacial Maximum, the genetic differentiation of regional populations indicated a limited
role of the exposed sea floor as a dispersal corridor at that time. Overall, this study
provides evidence that differential impacts of Quaternary climate oscillation associated
with landscape heterogeneity have shaped the genetic structure of a wide-ranging
temperate tree in East Asia.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | allopatric divergence, East Asia, Kalopanax septemlobus, land-bridge, phylogeography, Quaternary |
| Research Division: | Biological Sciences |
| Research Group: | Evolutionary Biology |
| Research Field: | Biogeography and Phylogeography |
| Objective Division: | Environment |
| Objective Group: | Flora, Fauna and Biodiversity |
| Objective Field: | Flora, Fauna and Biodiversity of environments not elsewhere classified |
| UTAS Author: | Worth, JRP (Dr James Worth) |
| ID Code: | 94793 |
| Year Published: | 2012 |
| Web of Science® Times Cited: | 56 |
| Deposited By: | Plant Science |
| Deposited On: | 2014-09-17 |
| Last Modified: | 2014-10-13 |
| Downloads: | 0 |
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