Differential Quaternary dynamics of evergreen broadleaved forests in subtropical China revealed by phylogeography of Lindera aggregata (Lauraceae)

doi:10.1111/jbi.13547

	Differential Quaternary dynamics of evergreen broadleaved forests in subtropical China revealed by phylogeography of Lindera aggregata (Lauraceae)
	Ye, Jun-Wei 1,2; Li, De-Zhu1 ; Hampe, Arndt 3
通讯作者	Ye, Jun-Wei(jw.ye@foxmail.com)
	2019-06-01
发表期刊	JOURNAL OF BIOGEOGRAPHY
ISSN	0305-0270
卷号	46 期号:6 页码:1112-1123
摘要	Aim According to palaeo-biome reconstructions, the subtropical evergreen broadleaved forests (EBLF) in East Asia contracted to a narrow belt south of 24 degrees N during the Last Glacial Maximum (LGM). Yet numerous phylogeographical studies of EBLF plants have inferred glacial refugia north of this area. Here, we aim to further elucidate the Quaternary dynamics of EBLFs using the widespread shrub Lindera aggregata as model. Location Subtropical China. Taxon Lindera aggregata (Sims) Kosterm (angiosperms). Methods Four chloroplast DNA (cpDNA) fragments and 15 low-copy nuclear genes (LCGs) were sequenced in 19 populations. The time to the most recent common ancestor (TMRCA) was estimated using secondary calibrations. Bayesian algorithms were used to infer population clustering, phylogeny and divergence time. Historical gene flow was estimated using a maximum-likelihood algorithm. Potential habitats at present and during the LGM were predicted using ecological niche modelling. Results The TMRCA estimate was 1.78 Myr. We observed a shallow cpDNA network organized around one dominant haplotype. The LCGs revealed three distinct genetic clusters that reflected contrasting historical population dynamics. The most ancient cluster was located south of the Nanling and Wuyi Mountains and indicated long-term population persistence in multiple refugia. The area further north was occupied by two disjunct clusters that dated back to the LGM and showed signatures of a rapid northward expansion from two refugia. We detected noteworthy pollen-mediated secondary admixture between all three clusters including somewhat preferential southward gene flow. Main conclusions Lindera aggregata represents a rare example of extensive post-glacial range expansion across the EBLF biome (expansion-contraction model) that contrasts with its generalized long-term population stability in the southernmost range parts. Our findings also provide rare evidence for noteworthy post-glacial gene flow into long-term refugial populations. They correspond relatively well with palaeo-biome reconstructions and support the hypothesis that the EBLF has undergone extensive post-glacial community reshuffling.
关键词	evergreen broadleaved forests genetic break Lindera aggregata microrefugia range expansion secondary admixture southern refugia model
DOI	10.1111/jbi.13547
收录类别	SCI
语种	英语
WOS记录号	WOS:000470781300002
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/67384
专题	中国西南野生生物种质资源库
通讯作者	Ye, Jun-Wei
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming, Yunnan, Peoples R China 2.Shanghai Sci & Technol Museum, Shanghai Nat Hist Museum, Nat Hist Res Ctr, Shanghai, Peoples R China 3.Univ Bordeaux, INRA, BioGeCo, Cestas, France
推荐引用方式 GB/T 7714	Ye, Jun-Wei,Li, De-Zhu,Hampe, Arndt. Differential Quaternary dynamics of evergreen broadleaved forests in subtropical China revealed by phylogeography of Lindera aggregata (Lauraceae)[J]. JOURNAL OF BIOGEOGRAPHY,2019,46(6):1112-1123.
APA	Ye, Jun-Wei,Li, De-Zhu,&Hampe, Arndt.(2019).Differential Quaternary dynamics of evergreen broadleaved forests in subtropical China revealed by phylogeography of Lindera aggregata (Lauraceae).JOURNAL OF BIOGEOGRAPHY,46(6),1112-1123.
MLA	Ye, Jun-Wei,et al."Differential Quaternary dynamics of evergreen broadleaved forests in subtropical China revealed by phylogeography of Lindera aggregata (Lauraceae)".JOURNAL OF BIOGEOGRAPHY 46.6(2019):1112-1123.

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