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题名: Species delimitation of Chinese hop-hornbeams based on molecular and morphological evidence
作者: Lu, ZQ; Zhang, D; Liu, SY; Yang, XY; Liu, X; Liu, JQ(刘建全)
收录类别: SCIE ; MEDLINE ; BIOSIS
出版日期: 2016-07
刊名: ECOLOGY AND EVOLUTION
卷号: 6, 期号:14, 页码:4731-4740
英文摘要: Species delimitation through which infers species boundaries is emerging as a major work in modern systematics. Hop-hornbeam species in Ostrya (Betulaceae) are well known for their hard and heavy woods. Five species were described in China and their interspecific delimitations remain unclear. In this study, we firstly explored their distributions in all recorded field sites distributed in China. We then selected 110 samples from 22 natural populations of five species from this genus and one type specimen of O.yunnanensis, for molecular barcoding analyses. We sequenced four chloroplast (cp) DNA fragments (trnH-psbA, trnL-trnF, rps16, and trnG) and the nuclear internal transcribed spacer (ITS) region for all samples. Sequence variations of Ostrya from four cpDNA fragments identified three groups that showed no correspondence to any morphological delimitation because of the incomplete lineage sorting and/or possible interspecific introgression in the history. However, phylogenetic analyses of ITS sequence variations discerned four species, O.japonica, O.rehderiana, O.trichocarpa, and O.multinervis while O.yunnanensis nested within O.multinervis. Morphological clustering also discerned four species and showed the complete consistency with molecular evidence. Moreover, our phylogenetic analyses-based ITS sequence variations suggested that O.trichocarpa comprised an isolated lineage different from the other Eurasian ones. Based on these results, hop-hornbeams in China should be treated as four separate species. Our results further highlight the importance of ITS sequence variations in delimitating and discerning the closely related species in plants.
关键词: Genetic gaps ; incomplete lineage sorting ; internal transcribed spacer ; introgression ; Ostrya ; species delimitation
作者部门: [Lu, Zhiqiang ; Liu, Siyu ; Yang, Xiaoyue ; Liu, Xue ; Liu, Jianquan] Lanzhou Univ, State Key Lab Grassland Agroecosyst, Coll Life Sci, Lanzhou, Peoples R China ; [Zhang, Dan ; Liu, Jianquan] Sichuan Univ, MOE Key Lab Bioresources & Ecoenvironm, Coll Life Sci, Chengdu, Peoples R China
通讯作者: Liu, JQ (reprint author), Lanzhou Univ, State Key Lab Grassland Agroecosyst, Coll Life Sci, Lanzhou, Peoples R China.
学科分类: Environmental Sciences & Ecology; Evolutionary Biology
文章类型: Article
所属项目编号: National Natural Science Foundation of China [3159820011]
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 英语
DOI: 10.1002/ece3.2251
ISSN号: 2045-7758
WOS记录号: WOS:000380033400009
PM记录号: 27547308
BIOSIS记录号: BCI:BCI201600669439
IR记录号: WOS:000380033400009
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182038
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Lu, ZQ,Zhang, D,Liu, SY,et al. Species delimitation of Chinese hop-hornbeams based on molecular and morphological evidence[J]. ECOLOGY AND EVOLUTION,2016,6(14):4731-4740.
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