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题名: Molecular phylogeny and biogeography of the arctic-alpine genus Lagotis (Plantaginaceae)
作者: Li, Guo-Dong1, 2; Kim, Changkyun1; Zha, Hong-Guang1; Zhou, Zhuo1; Nie, Ze-Long1; Sun Hang(孙航)1
刊名: TAXON
关键词: arctic-alpine ; biogeography ; Central Asiatic Highland Corridor ; Lagotis ; phylogeny
英文摘要: It has been suggested that many plants now found in the arctic originated from ancestors that occurred at high altitudes in the southern mountains of the Northern Hemisphere during the Tertiary. However, this hypothesis has rarely been tested using a molecular phylogenetic approach. Here, we present a fossil-calibrated molecular phylogeny of Lagotis, an arctic-alpine genus with the greatest diversity in the Qinghai-Tibetan Plateau (QTP) and Central Asian mountains, based on five chloroplast (matK, psbA-trnH, rps16, trnG-S, trnL-F) and nuclear ribosomal ITS DNA markers. Within this framework, we infer the ancestral area and biogeographic history of the genus. Four major clades (A D) within Lagotis were recovered with strong support, which largely correspond to the previous classification of the genus. Within clade A, Lagotis species from QTP were distributed among several subclades, and L. integrifolia from Central Asia was sister to L. glauca and L. minor from the arctic and subarctic region. The Bayesian molecular dating and the ancestral area reconstruction analyses suggested that Lagotis could have originated in the QTP in the Miocene (Tertiary), and that the genus radiated from the Miocene to Pleistocene. The diversification of Lagotis probably took place predominantly in the QTP and it subsequently spread to the Central Asian highlands, followed by northward migration into the arctic. Our results support the hypothesis that the "Central Asiatic Highland Corridor" as an important route for the migration of the flora between the arctic and QTP.
出版日期: 2014-02-01
卷号: 63, 期号:1, 页码:103-115
语种: 英语
收录类别: SCI
学科分类: Plant Sciences ; Evolutionary Biology
ISSN号: 0040-0262
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18146
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
2.Yunnan Univ Tradit Chinese Med, Fac Tradit Chinese Pharm, Kunming 650500, Yunnan, Peoples R China

Recommended Citation:
Li,Guo-Dong;Kim,Changkyun;Zha,Hong-Guang;Zhou,Zhuo;Nie,Ze-Long;Sun,Hang.Molecular phylogeny and biogeography of the arctic-alpine genus Lagotis (Plantaginaceae),TAXON,2014,63(1):103-115
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