Evolutionary history of an alpine shrub Hippophae tibetana (Elaeagnaceae): allopatric divergence and regional expansion

0436083 - BÚ 2015 RIV GB eng J - Journal Article
Jia, Dong-Rui - Liu, T.-L. - Wang, L -Y. - Zhou, D.-W. - Liu, J.-Q.
Evolutionary history of an alpine shrub Hippophae tibetana (Elaeagnaceae): allopatric divergence and regional expansion.
Biological Journal of the Linnean Society. Roč. 102, č. 1 (2011), s. 37-50. ISSN 0024-4066. E-ISSN 1095-8312
Institutional research plan: CEZ:AV0Z60050516
Keywords : coalescent simulations * cpDNA * glacial refugia * orogenic processes * Quaternary glaciation
Subject RIV: EF - Botanics
Impact factor: 2.193, year: 2011

Increasing evidence suggests that geological or climatic events in the past promoted allopatric speciation of alpine plants in the Qinghai-Tibetan Plateau and adjacent region. However, few studies have been undertaken to examine whether such allopatric divergences also occurred within a morphologically uniform species. In the present study, we report the evolutionary history of an alpine shrub species, Hippophae tibetana, based on examining chloroplast DNA (cpDNA) and nuclear ribosomal internal transcribed spacer (ITS) DNA variations. We sequenced two cpDNA fragments (trnL-F and trnS-G) and the nuclear ITS region in 183 individuals collected from 21 natural populations. These findings, when taken together, suggested that this species had experienced long allopatric divergence and recent regional range expansions in response to orogenic processes and the climate changes. The evolutionary history of this shrub species highlights importance of geographical isolations to the intraspecific divergence of alpine plants occurring in the worlds ruff.
Permanent Link: http://hdl.handle.net/11104/0239881