Yamagata T, Ohishi K, Faruque M O, Masangkay J S, Ba-Loc C, Vu-Binh D, Mansjoer S S, Ikeda H, Namikawa T
Laboratory of Animal Genetics, School of Agricultural Sciences, Nagoya University, Japan.
Jpn J Genet. 1995 Jun;70(3):321-37. doi: 10.1266/jjg.70.321.
The musk shrew (Suncus Murinus) is widely distributed throughout Asia and East Africa. The mitochondrial DNA (mtDNA) of this species was analyzed in individuals from 31 local populations in nine Asian countries and Mauritius, using 17 restriction endonucleases. Although fourteen and nine mtDNA haplotypes were detected from Bangladesh and Nepal, respectively, one to four haplotypes were found in each Southeast Asian country, and one common haplotype existed in Japan, Philippines, Vietnam, Thailand and Indonesia. Clustering analysis of mtDNA haplotypes classified shrew populations to three groups--continental group (Bangladesh and Nepal), islands' group (insular countries and Vietnam) and Malay group. The average nucleotide diversity among these three groups was calculated to be about 3.5%. These results indicate that the origin of feral populations in this species might be old and their population sizes are extremely large in the continent, and suggest a rapid spread of this animal throughout the islands. Although we have not shown yet an evidence of close relationships between islands' and continental mtDNA haplotypes, it is likely that the musk shrew had migrated from the continent in South Asia to the islands in Southeast Asia recently.
臭鼩（Suncus Murinus）广泛分布于亚洲和东非。利用17种限制性内切酶，对来自9个亚洲国家和毛里求斯31个当地种群的个体进行了该物种线粒体DNA（mtDNA）分析。尽管分别从孟加拉国和尼泊尔检测到14个和9个mtDNA单倍型，但在每个东南亚国家发现了1至4个单倍型，并且在日本、菲律宾、越南、泰国和印度尼西亚存在一个共同的单倍型。mtDNA单倍型的聚类分析将臭鼩种群分为三组——大陆组（孟加拉国和尼泊尔）、岛屿组（岛屿国家和越南）和马来组。这三组之间的平均核苷酸多样性计算约为3.5%。这些结果表明，该物种野生种群的起源可能古老，其在大陆的种群规模极大，并表明这种动物在各岛屿迅速扩散。尽管我们尚未证明岛屿和大陆mtDNA单倍型之间存在密切关系，但臭鼩很可能最近从南亚大陆迁移到了东南亚岛屿。
