Ancient allopatry and ecological divergence act together to promote plant diversity in mountainous regions: evidence from comparative phylogeography of two genera in the Sino-Himalayan region

doi:10.1186/s12870-023-04593-1

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	Ancient allopatry and ecological divergence act together to promote plant diversity in mountainous regions: evidence from comparative phylogeography of two genera in the Sino-Himalayan region
	Peng,Junchu; Ma,Xiangguang; Sun,Hang
	2023
发表期刊	BMC PLANT BIOLOGY
卷号	23 期号:1 页码:572
摘要	Background How geographical isolation and ecological divergence act together to promote plant diversity in mountainous regions remains largely unknown. In this study, we chose two genera comprising a small number of species distributed in the Sino-Himalayan region, Megacodon (Gentianaceae) and Beesia (Ranunculaceae), which both exhibit a fragmented distribution pattern and are found across a wide range of elevations. By summarizing their common patterns of speciation and/or divergence processes, we aim to understand how environmental changes accelerated lineage diversification in the Sino-Himalayan region through ancient allopatry and ecological divergence.Results Using ddRAD-seq, chloroplast genome sequences, and specific molecular markers, we studied the phylogenetic relationships, population structure, and historical biogeography of Beesia and Megacodon. Both genera began to diverge from the late Miocene onwards, with ancient allopatry at lower elevations formed narrow-range species or relict populations. Mantel tests between genetic distance and climatic, elevational, or geographic distance revealed an isolation-by-distance pattern in Beesia and Megacodon stylophorus. Megacodon showed two clades occupying entirely different altitudinal ranges, whereas Beesia calthifolia exhibited a genetic divergence pattern along an elevation gradient. Furthermore, we conducted morphological measurements on Beesia calthifolia and found that different elevational groups had distinct leaf shapes.Conclusions The regional disjunctions of plant groups in the Sino-Himalayan region are drastic and closely related to several biogeographic boundaries. As a consequence of major geological and climate change, ecological divergence when different elevations are colonized often happens simultaneously within plant groups. Although habitat fragmentation and parapatric ecological divergence each spur speciation to different extents, a combined effect of these two factors is a common phenomenon in the Sino-Himalayan region.
关键词	Comparative phylogeography Beesia Megacodon Sino-Himalayan Ecological divergence Habitat fragmentation EVOLUTIONARY HISTORY HENGDUAN MOUNTAINS POPULATION-STRUCTURE MOLECULAR PHYLOGENY TIBETAN PLATEAU TOOL SET BIODIVERSITY UPLIFT CONSERVATISM INSIGHTS
DOI	10.1186/s12870-023-04593-1
WOS记录号	WOS:001106646500001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74949
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Peng,Junchu,Ma,Xiangguang,Sun,Hang. Ancient allopatry and ecological divergence act together to promote plant diversity in mountainous regions: evidence from comparative phylogeography of two genera in the Sino-Himalayan region[J]. BMC PLANT BIOLOGY,2023,23(1):572.
APA	Peng,Junchu,Ma,Xiangguang,&Sun,Hang.(2023).Ancient allopatry and ecological divergence act together to promote plant diversity in mountainous regions: evidence from comparative phylogeography of two genera in the Sino-Himalayan region.BMC PLANT BIOLOGY,23(1),572.
MLA	Peng,Junchu,et al."Ancient allopatry and ecological divergence act together to promote plant diversity in mountainous regions: evidence from comparative phylogeography of two genera in the Sino-Himalayan region".BMC PLANT BIOLOGY 23.1(2023):572.

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