Genetic Divergence and Biogeographical Patterns in Amentotaxus argotaenia Species Complex
Ge, Xue-Jun1; Hung, Kuo-Hsiang2; Ko, Ya-Zhu3; Hsu, Tsai-Wen4; Gong, Xun5; Chiang, Tzen-Yuh6; Chiang, Yu-Chung3
2015-04-01
发表期刊PLANT MOLECULAR BIOLOGY REPORTER
卷号33期号:2页码:264-280
摘要

The Amentotaxus argotaenia (Taxaceae) species complex is comprised of four relict and endangered gymnosperms. Amentotaxus argotaenia and A. yunnanensis are scattered throughout South and Central China, and A. formosana, and A. poilanei are restricted to Taiwan and Vietnam. In the present study, we examined genetic divergence and biogeographical patterns in the species complex based on chloroplast DNA atpI-atpH and rpS16-trnK intergenic spacers, the mitochondrial DNA nad1 intron, and microsatellite markers. Genealogical analyses revealed systematic inconsistencies between organellar DNA markers, with paraphyletic species inferred based on cpDNA, versus a monophyletic A. formosana, and clustering of A. poilanei within A. yunnanensis at mtDNA. AMOVA revealed that most organellar DNA variants resided among species and populations, a pattern also supported by clustering with STRUCTURE analyses on microsatellites. Higher levels of genetic diversity in the Yongxin population of A. argotaenia reflected features of a refugium. Most speciation events were rather recent, with divergence no earlier than 2.50 MYA, although many ancient lineages derived 4.12-13.84 MYA were maintained within species. Significant genetic structuring within A. argotaenia was detected among three geographical regions-a phylogeographical pattern likely attributable to past fragmentations. In contrast to paraphyletic A. argotaenia based on the maintenance of ancestral polymorphisms, interspecific hybridization likely contributed to polyphyly in A. yunnanensis. Furthermore, despite the low likelihood of recurrent gene flow due to geographical isolation, IM analyses revealed continued interspecific gene flow after species divergence, reflecting a parapatric speciation model.

关键词Amentotaxus Gene Flow Hybridization Paraphyly Past Fragmentation Species Divergence
资助信息National Basic Research Program of China (973 Program) [2014CB954100]; National Natural Science Foundation of China [30170070]; National Science Council of Taiwan [NSC 96-2628-B-020 -001 -MY2, NSC 102-2628-B-110 -001 -MY3]
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/20634
专题中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者Chiang, Tzen-Yuh; Chiang, Yu-Chung
作者单位1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, South China Bot Garden, Guangzhou, Guangdong, Peoples R China
2.Pingtung Univ Sci & Technol, Grad Inst Bioresources, Pingtung, Taiwan
3.Natl Sun Yat Sen Univ, Dept Biol Sci, Kaohsiung 80424, Taiwan
4.Taiwan Endem Species Res Inst, Nantou, Taiwan
5.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China
6.Natl Cheng Kung Univ, Dept Life Sci, Tainan 70101, Taiwan
推荐引用方式
GB/T 7714
Ge, Xue-Jun,Hung, Kuo-Hsiang,Ko, Ya-Zhu,et al. Genetic Divergence and Biogeographical Patterns in Amentotaxus argotaenia Species Complex[J]. PLANT MOLECULAR BIOLOGY REPORTER,2015,33(2):264-280.
APA Ge, Xue-Jun.,Hung, Kuo-Hsiang.,Ko, Ya-Zhu.,Hsu, Tsai-Wen.,Gong, Xun.,...&Chiang, Yu-Chung.(2015).Genetic Divergence and Biogeographical Patterns in Amentotaxus argotaenia Species Complex.PLANT MOLECULAR BIOLOGY REPORTER,33(2),264-280.
MLA Ge, Xue-Jun,et al."Genetic Divergence and Biogeographical Patterns in Amentotaxus argotaenia Species Complex".PLANT MOLECULAR BIOLOGY REPORTER 33.2(2015):264-280.
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