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题名: Chloroplast DNA variation and phylogeography of Ligularia tongolensis (Asteraceae), a species endemic to the Hengduan Mountains region of China
作者: Wang, Jin-Feng1, 2; Pan, Yue-Zhi1; null(龚洵)1; Chiang, Yu-Chung3; Kuroda, Chiaki4
刊名: JOURNAL OF SYSTEMATICS AND EVOLUTION
关键词: genetic variation ; Ligularia tongolensis ; phylogeography ; Quaternary glaciation
英文摘要: In this research, we aimed to study the genetic variation and phylogeographic pattern of Ligularia tongolensis, a perennial herb endemic to the Hengduan Mountains region of China. We sequenced two chloroplast DNA (cpDNA) intergenic spacers (trnQ-5'rps16, trnL-rpl32) in 140 individuals from 14 populations of three groups (Jinshajiang vs. Yalongjiang vs. Wumeng) within this species range. High levels of haplotype diversity (Hd = 0.814) and total genetic diversity (Ht = 0.862) were detected at the species level, based on a total of 12 haplotypes identified. Low levels of intrapopulation diversity (Hs = 0.349), high levels of genetic divergence (Gst = 0.595, Nst = 0.614, Fst = 0.597), and the absence of isolation by distance tests were also found in L. tongolensis. Furthermore, H2 and H5, the dominant haplotypes that located at internal nodes and deviated from extinct ancestral haplotype in the network, were found to be shared between Jinshajiang and Yalongjiang groups. These results indicate that past fragmentation may be the important factor responsible for the present phylogeographical pattern of L. tongolensis. Meanwhile, the locations occupied by each group might have served as independent refugia for L. tongolensis during the Quaternary glaciation. Unimodal mismatch distribution and star-like genealogies indicated this species underwent past demographic expansion events, with expansion ages of 274 ka BP.
出版日期: 2011-03-01
卷号: 49, 期号:2, 页码:108-119
DOI标识: 10.1111/j.1759-6831.2011.00117.x
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 1674-4918
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/5299
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Natl Sun Yat Sen Univ, Dept Biol Sci, Kaohsiung 80424, Taiwan
4.Rikkyo Univ, Dept Chem, Tokyo 1718501, Japan

Recommended Citation:
Wang, JF; Pan, YZ; Gong, X; Chiang, YC; Kuroda, C.Chloroplast DNA variation and phylogeography of Ligularia tongolensis (Asteraceae), a species endemic to the Hengduan Mountains region of China,JOURNAL OF SYSTEMATICS AND EVOLUTION,2011,49(2):108-119
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