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题名: Complex evolution in Arundinarieae (Poaceae: Bambusoideae): Incongruence between plastid and nuclear GBSSI gene phylogenies
作者: Zhang, Yu-Xiao; Zeng, Chun-Xia; null(李德铢)1
刊名: MOLECULAR PHYLOGENETICS AND EVOLUTION
关键词: Arundinarieae ; GBSSI gene ; Hybridization ; Incongruence ; Lineage sorting ; Plastid DNA regions
英文摘要: The monophyly of tribe Arundinarieae (the temperate woody bamboos) has been unequivocally recovered in previous molecular phylogenetic studies. In a recent phylogenetic study, 10 major lineages in Arundinarieae were resolved based on eight non-coding plastid regions, which conflicted significantly with morphological classifications both at the subtribal and generic levels. Nevertheless, relationships among and within the 10 lineages remain unclear. In order to further unravel the evolutionary history of Arundinarieae, we used the nuclear GBSSI gene sequences along with those of eight plastid regions for phylogenetic reconstruction, with an emphasis on Chinese species. The results of the plastid analyses agreed with previous studies, whereas 13 primary clades revealed in the GBSSI phylogeny were better resolved at the generic level than the plastid phylogeny. Our analyses also revealed many inconsistencies between the plastid DNA and the nuclear GBSSI trees. These results implied that the nuclear genome and the plastid genome had different evolutionary trajectories. The patterns of incongruence suggested that lack of informative characters, incomplete lineage sorting, and/or hybridization (introgression) could be the causes. Seven putative hybrid species were hypothesized, four of which are discussed in detail on the basis of topological incongruence, chromosome numbers, morphology, and distribution patterns, and those taxa probably resulted from homoploid hybrid speciation. Overall, our study indicates that the tribe Arundinarieae has undergone a complex evolution. (c) 2012 Elsevier Inc. All rights reserved.
出版日期: 2012-06-01
卷号: 63, 期号:3, 页码:777-797
DOI标识: 10.1016/j.ympev.2012.02.023
语种: 英语
ISSN号: 1055-7903
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/17630
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 650201, Yunnan, Peoples R China
2.Germplasm Bank Wild Species, Plant Germplasm & Genom Ctr, Kunming 650201, Yunnan, Peoples R China
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