Genetic structure of a widespread alpine shrub Rhododendron aureum (Ericaceae) across East Asia

被引:0
|
作者
Maria A. Polezhaeva
Natalya A. Tikhonova
Elena A. Marchuk
Makar V. Modorov
Maryana N. Ranyuk
Alexey N. Polezhaev
Natalya K. Badmayeva
Vladimir L. Semerikov
机构
[1] Ural Branch of the Russian Academy of Sciences,Institute of Plant and Animal Ecology
[2] V. N. Sukachev Institute of Forest,Institute of the Biological Problems of the North
[3] Siberian Branch of the Russian Academy of Sciences,Institute of General and Experimental Biology
[4] Botanical Garden-Institute,undefined
[5] Far Eastern Branch of the Russian Academy of Sciences,undefined
[6] Far Eastern Branch of the Russian Academy of Sciences,undefined
[7] Siberian Branch of the Russian Academy of Sciences,undefined
来源
Journal of Plant Research | 2021年 / 134卷
关键词
Alpine plants; Biogeography; Microsatellites; Refugium; Siberia;
D O I
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中图分类号
学科分类号
摘要
The vast territory of East Asia, including southwestern Beringia, is considered to have been almost ice free during the Pleistocene. Cold-resistant flora may have persisted in this region expanding or contracting its range during the climate cooling. Only a few plant genera have been studied with a sampling area across their entire geographic range in East Asia; therefore, the understanding of the biogeographic history of alpine flora in this region remains limited. In the present study, genetic variation and population structure in 21 populations of the alpine shrub Rhododendron aureum across its range in East Asia were assessed using 18 microsatellite loci. Phylogenetic analyses revealed three main genetic groups: Siberia, Northeast, and North Pacific. According to the geographical pattern of genetic diversity, the North Pacific group includes populations from Kamchatka, south of Russian Far East, and territories close to central Japan. This group is the most diverse and likely diverged earlier than the Siberia and Northeast groups. Ecological niche modeling predicts range expansion of this species during the period of cooling and, together with demographic history, suggests that the divergence between the three main genetic groups predated the Last Glacial Maximum. Similar to other cold-resistant species such as Larix sibirica and Juniperus communis, the pattern of genetic diversity of R. aureum supports the survival of the species at high latitudes during the Pleistocene with limited contribution of the southern populations to expansion of the species range to the Northeast region and Siberia.
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页码:91 / 104
页数:13
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