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题名: Monophyly of Kelloggia Torrey ex Benth. (Rubiaceae) and evolution of its intercontinental disjunction between western North America and eastern Asia
作者: null(聂泽龙); Wen, J; Sun Hang(孙航); Bartholomew, B
刊名: AMERICAN JOURNAL OF BOTANY
关键词: disjunction ; eastern Asia ; Kelloggia ; monophyly ; Rubiaceae ; western North America
英文摘要: Kelloggia Torrey ex Bentham (Rubiaceae) consists of two species disjunctly distributed in western North America (K. galioides Torrey) and the western part of eastern Asia (K. chinensis Franch.). The two species exhibit a high level of morphological divergence. To test its monophyly and to infer its biogeographic history, we estimated the phylogeny of Kelloggia and its relatives from sequences of three chloroplast DNA regions (rbcL gene, atpB-rbcL spacer, and rps16 intron). The monophyly of Kelloggia was strongly Supported, and it forms a sister relationship with the tribe Rubieae. The divergence time between the two disjunct species of Kelloggia was estimated to be 5.42 +/- 2.32 million years ago (mya) using the penalized likelihood method based on rbcL sequence data with fossil calibration. Our result does not support the Madrean-Tethyan hypothesis, which assumes an earlier divergence time of 20-25 mya. Ancestral area analysis, as well as dispersal-vicariance (DIVA) analysis, suggests the Asian origin of Kelloggia and the importance of Eurasia in the diversification of its close relatives in the Rubieae-Theligoneae-Paederieae group. The intercontinental disjunction in Kelloggia is suggested to have evolved via long-distance dispersal from Asia into western North America.
出版日期: 2005-04-01
卷号: 92, 期号:4, 页码:642-652
语种: 英语
ISSN号: 0002-9122
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2823
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, Kunming 650204, Yunnan, Peoples R China
2.Field Museum Nat Hist, Dept Bot, Chicago, IL 60605 USA
3.Chinese Acad Sci, Inst Bot, Lab Syst & Evolutionary Bot, Beijing 100093, Peoples R China
4.Calif Acad Sci, Dept Bot, San Francisco, CA 94118 USA

Recommended Citation:
Nie, ZL; Wen, J; Sun, H; Bartholomew, B.Monophyly of Kelloggia Torrey ex Benth. (Rubiaceae) and evolution of its intercontinental disjunction between western North America and eastern Asia,AMERICAN JOURNAL OF BOTANY,2005,92(4):642-652
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