https://scholars.lib.ntu.edu.tw/handle/123456789/624968
標題: | Within-island speciation with an exceptional case of distinct separation between two sibling lizard species divided by a narrow stream | 作者: | SHU-PING TSENG Wang C.-J Li S.-H Lin S.-M. |
關鍵字: | Ancestral range reconstruction; Contact zone; Fine-scale differentiation; Genetic introgression; Hybridisation; Parapatric speciation | 公開日期: | 2015 | 卷: | 90 | 起(迄)頁: | 164-175 | 來源出版物: | Molecular Phylogenetics and Evolution | 摘要: | Delimitation of genetic and geographic boundaries between species is a focus of evolutionary biology. In this study, we demonstrated fine-scale differentiation of Takydromus formosanus species complex comprising four insular endemics on Taiwan Island. Phylogeny and ancestral range reconstruction based on mitochondrial DNA sequences of 430 Takydromus lizards (405 lizards of this complex throughout their distribution range, and 25 lizards from 11 other species) indicated that the major branching process occurred within Taiwan, which represented a solid evidence of within-island speciation on this small island. We further demonstrated an exceptional case of a pair of sister species, T. viridipunctatus and T. luyeanus, that were separated by a narrow stream with a width of only 15. m. This pattern might be one of the narrowest contact zones ever documented in terrestrial vertebrates. To evaluate the level of genetic introgression between these sister species, a fine-scale collection of another 382 lizards was conducted along a transect line across the stream. A total of 13 microsatellite markers and mtDNA genotyping was used to detect a low proportion of hybrids (5.7-9.9% from STRUCTURE, and 2.3% from DAPC). Our results indicated that the two clades are highly differentiated across this extremely short distance. © 2015 Elsevier Inc. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931262613&doi=10.1016%2fj.ympev.2015.04.022&partnerID=40&md5=9a5dbf950a4163e6e8d5bbb9a461b806 https://scholars.lib.ntu.edu.tw/handle/123456789/624968 |
ISSN: | 10557903 | DOI: | 10.1016/j.ympev.2015.04.022 | SDG/關鍵字: | Squamata; Takydromus; Takydromus formosanus; Vertebrata; microsatellite DNA; mitochondrial DNA; animal; classification; DNA sequence; genetics; genotype; lizard; phylogeny; population dynamics; Animals; DNA, Mitochondrial; Genotype; Lizards; Microsatellite Repeats; Phylogeny; Population Dynamics; Sequence Analysis, DNA |
顯示於: | 昆蟲學系 |
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