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题名: Phylogenetic analyses of the banana family (Musaceae) based on nuclear ribosomal (ITS) and chloroplast (trnL-F) evidence
作者: Liu, Ai-Zhong1, 2; Kress, W. John1, 3; null(李德铢)2
刊名: TAXON
关键词: biogeography ; ITS ; molecular phylogeny ; Musaceae ; trnL-F
英文摘要: The banana family (Musaceae s.str.; Zingiberales), an economically important tropical group of plant, includes three genera, Musa, Ensete and Musella, and possible 41 species. We performed phylogenetic analyses of a total of 39 accessions covering 28 species in the Musaceae and five outgroup species using nuclear ribosomal ITS and chloroplast trnL-F sequences. Outgroups were chosen from the closely related families Lowiaceae. Strelitziaceae, and Heliconiaceae. Our results suggest that Musaceae s.str. is monophyletic. Three main internal clades are well-supported within the fmaily. The genus Musa is comprised of two of these clades, and Musella plus Ensete make-up the third clade. The sectional classification system of Musa based on chromosome numbers is not supported by DNA sequence evidence. Both inflorescence orientation (erect or pendent) and chromosomal number in Musa, which were characters traditionally though to be diagnostic in sectional classification, are homoplasious traits in the family. The disjunct distribution of living members of the genus Ensete in tropical Asia and Africa with a fossil species described from the Ecocene of Oregon in North America may be an example of the distributional retreat of the Boreal Tropics. The phylogenetic position of the monospecific Musella as sister to the African clade of Ensete suggests that the single species in this lineage is a highly specialized member not warranting generic status. Evidence from the molecular phylogenetic investigations highlights the evolutionary diversification and biogeographic context of this plant group, and suggests additional taxonomic investigations of both Musa and Ensete are in order.
出版日期: 2010-02-01
卷号: 59, 期号:1, 页码:20-28
语种: 英语
ISSN号: 0040-0262
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/14273
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, Xishuangbanna Trop Bot Garden, Kunming 650223, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
3.Natl Museum Nat Hist, Dept Bot, Smithsonian Inst, MRC 166, Washington, DC 20013 USA
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