title: An unstructured phylogeographic pattern with extensive gene flow in an endemic bird of South China: collared Finchbill (Spizixos semitorques).
abstract: Recent phylogeographical studies indicated that glacial oscillations played a key role on the phylogeographic pattern of extant species. As most studies have previously been carried out on heavily ice-covered regions, such as in European and North American regions, potential effects of climatic oscillations on species that are distributed on ice-free regions are less known. To address this, we investigated the phylogeographic pattern of an avian species endemic to South China, which was not glaciated during the Pleistocene glaciations. By using 2142 bp mitochondrial DNA, we identified 89 haplotypes defined by 39 polymorphic sites. A combination of high haplotype diversity (0.786-1.00) and low nucleotide diversity (0.00132-0.00252) was detected among geographic populations. Explicit genetic divergence was observed between S. s. semitorques and S. s. cinereicapillus but not detected among geographic populations of S. s. semitorques. Divergence time of the two subspecies was dated back to 87 Kyr which is congruent with the interglacial MIS 5. A weak phylogeographic structure due to strong gene flow among geographic populations was identified in this species, suggesting complex topography of South China has not formed barriers for this species.
authors: Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; E-Mails: quyh@ioz.ac.cn (Y.Q.); songgang@ioz.ac.cn (G.S.); daicy@ioz.ac.cn (C.D.); zhangry@ioz.ac.cn (R.Z.); yinzh@ioz.ac.cn (Z.Y.).
authors: Bin
authors: B
authors: Gao
authors: Lijiang
authors: L
authors: Yu
authors: Yanhua
authors: Y
authors: Qu
authors: Gang
authors: G
authors: Song
authors: Chuanyin
authors: C
authors: Dai
authors: Ruiying
authors: R
authors: Zhang
authors: Zuohua
authors: Z
authors: Yin
authors: Kaifeng
authors: K
authors: Wang
authors: Xuebin
authors: X
authors: Gao
authors: Shou-Hsien
authors: SH
authors: Li
authors: Fumin
authors: F
authors: Lei
mesh_terms: D000818:Animals; D001717:Birds / Q000145:classification / Q000235:genetics*; D002681:China; D004272:DNA, Mitochondrial / Q000032:analysis / Q000235:genetics*; D051456:Gene Flow; D014644:Genetic Variation; D005828:Genetics, Population; D006239:Haplotypes; D009010:Monte Carlo Method; D058974:Phylogeography; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial