Yuan Shou-Li, Lin Liang-Kong, Oshida Tatsuo
Laboratory of Wildlife Ecology, Department of Life Science, Tunghai University, Taichung, Taiwan 407, ROC.
Mol Ecol. 2006 Jul;15(8):2119-30. doi: 10.1111/j.1365-294X.2006.02875.x.
To test the Pleistocene interglacial refugia hypothesis with a high-elevation mammal, we studied the phylogeography of the mole-shrew (Anourosorex yamashinai) using partial mitochondrial cytochrome b gene sequences (737 bases). This shrew is endemic to Taiwan. It is mainly distributed in the highlands from 1000 to 2500 m in elevation. We examined 103 specimens from 24 localities in three mountain ranges of Taiwan and found 36 haplotypes. These haplotypes separated into two major phylogroups (Northern and Southern) plus a minor phylogroup (Houhuan) of only one haplotype. This demonstrated strong association with geography. The formation of these three phylogroups may be the result of interglacial refugia during the middle Pleistocene. Distinct sublineages were not found within each major phylogroup, suggesting that the populations (phylogroups) explosively expanded from the interglacial refugia of ancestral founder haplotypes. The present distribution pattern of haplotypes suggests that Mount Houhuan is an effective refugium in central Taiwan. It was not possible to specify the refugia for the Northern and Southern phylogroups.
为了用一种高海拔哺乳动物来检验更新世间冰期避难所假说，我们利用部分线粒体细胞色素b基因序列（737个碱基）研究了麝鼩（Anourosorex yamashinai）的系统地理学。这种麝鼩是台湾特有的。它主要分布在海拔1000至2500米的高地。我们检查了来自台湾三个山脉24个地点的103个标本，发现了36个单倍型。这些单倍型分为两个主要系统群（北部和南部）以及一个仅由一个单倍型组成的次要系统群（后缓）。这表明与地理有很强的关联。这三个系统群的形成可能是中更新世间冰期避难所的结果。在每个主要系统群内未发现明显的亚谱系，这表明种群（系统群）从祖先奠基者单倍型的间冰期避难所爆发式扩张。单倍型的当前分布模式表明后缓山是台湾中部一个有效的避难所。无法确定北部和南部系统群的避难所。
