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题名: Evolution of biogeographic disjunction between eastern Asia and eastern North America in Phryma (Phrymaceae)
作者: Nie, Ze-Long; Sun Hang(孙航); Beardsley, Paul M.; Olmstead, Richard G.; Wen, Jun
刊名: AMERICAN JOURNAL OF BOTANY
关键词: biogeography ; intercontinental disjunction ; eastern Asia ; eastern North America ; morphological stasis ; Phryma ; Phrymaceae ; phylogeography
英文摘要: This study examines molecular and morphological differentiation in Phryma L., which has only one species with a well-known classic intercontinental disjunct distribution between eastern Asia (EA) and eastern North America (ENA). Phylogenetic analysis of nuclear ribosomal ITS and chloroplast rps16 and trnL-F sequences revealed two highly distinct clades corresponding to EA and ENA. The divergence time between the intercontinental populations was estimated to be 3.68 +/- 2.25 to 5.23 +/- 1.37 million years ago (mya) based on combined chloroplast data using Bayesian and penalized likelihood methods. Phylogeographic and dispersal-vicariance (DIVA) analysis suggest a North American origin of Phryma and its migration into EA via the Bering land bridge. Multivariate analysis based on 23 quantitative morphological characters detected no geographic groups at the intercontinental level. The intercontinental populations of Phryma thus show distinct molecular divergence with little morphological differentiation. The discordance of the molecular and morphological patterns may be explained by morphological stasis due to ecological similarity in both continents. The divergence of Phryma from its close relatives in the Phrymaceae was estimated to be at least 32.32 +/- 4.46 to 49.35 +/- 3.18 mya.
出版日期: 2006-09-01
卷号: 93, 期号:9, 页码:1343-1356
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0002-9122
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2821
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.Smithsonian Inst, Museum Natl Hist Nat, Dept Bot, Washington, DC 20013 USA
2.Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
4.Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA
5.Univ Washington, Dept Biol, Seattle, WA 98195 USA
6.Chinese Acad Sci, Inst Bot, Lab Systemat & Evolut Bot, Beijing 100093, Peoples R China

Recommended Citation:
Nie, ZL; Sun, H; Beardsley, PM; Olmstead, RG; Wen, J.Evolution of biogeographic disjunction between eastern Asia and eastern North America in Phryma (Phrymaceae),AMERICAN JOURNAL OF BOTANY,2006,93(9):1343-1356
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