Multiple factors have shaped the phylogeography of Chinese spiny loach Cobitis sinensis in Taiwan as inferred from mitochondrial DNA variation
Multiple factors have shaped the phylogeography of Chinese spiny loach Cobitis sinensis in Taiwan as inferred from mitochondrial DNA variation
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DOI：
10.1111/j.1095-8649.2010.02589.x
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发表时间：
2010-04-01
影响因子：
2
通讯作者：
Hsu, K. -C.
中科院分区：
文献类型：
--
作者：
Chiang, T. -Y.;Lin, H. -D.;Hsu, K. -C.
根据线粒体DNA细胞色素B序列（1140 bp），将采自台湾12个水系的61条中华鳅（Cobitis sinensis）分为两个主要分支，分别分布于曾文以北和曾文以南（包括曾文），分别为南方和北方。这两个星系群之间的分歧时间估计为距今734 - 906万年（b. p.），但这两个群是由C. 3.41-4.23和2.22-2.75 M b. p.，分别此外，地质事件已被重新计算，台湾岛出现在海平面以上的估计c。4-5 M b.p.，并在C点迅速形成了现在的形状。200万桶/年通过造山运动。这些结果表明，这两个主要分支的C。台湾的中华民国可能起源于两个不同的大陆种群，因为该岛在上新世最初的隔离。在台湾南部，最初的殖民地被假设是在高屏河，然后向北扩散。高屏与曾文的高度分异受冰川及地形影响。在台湾北部，殖民地是从苗栗高原经台湾西部到台湾东北部和北方。这种扩散模式与先前提出的假设是一致的。显然，地质和地理证据都表明，兰阳河对塔基亚河上游的河流捕获促进了淡水鱼类的分布范围扩大，也表明台湾境内的中央山脉并没有成为C. sinensis。
Mitochondrial DNA cytochrome b sequences (1140 bp) in 61 specimens of Chinese spiny loach Cobitis sinensis from 12 drainages in Taiwan were identified as two major clades, exhibiting a southern and a northern distribution, north of TzengWen and south of TzengWen (including TzengWen), respectively. The divergence time between these two phylogroups was estimated at 7.34-9.06 million years before present (b.p.), but these two phylogroups were formed c. 3.41-4.23 and 2.22-2.75 M b.p., respectively. Moreover, geological events have been recalculated that Taiwan Island emerged above sea level at an estimate of c. 4-5 M b.p., and quickly became its present shape at c. 2 M b.p. through mountain building. These results suggest that these two major clades of C. sinensis in Taiwan might originate from two different continental populations, since the island's initial isolation in the Pliocene. Within southern Taiwan, the initial colonization was hypothesized to be in KaoPing River, followed by its northward dispersal. The high divergence between KaoPing and TzengWen was influenced by glaciations and landforms. Within north Taiwan, the colonization was from the Miaoli Plateau through western Taiwan to north-eastern and northern Taiwan. This dispersal pattern is concordant with the previously proposed hypothesis. Apparently, both geological and phylogeographic evidence suggested that river capture of the upper Takia River by the LanYang River promoted range expansion in freshwater fishes and also indicated that the Central Range within Taiwan did not act as a barrier to the dispersal of C. sinensis.