中山大学学报（自然科学版）2005，Vol.44Issue(3)：82-85,4.
施氏屋顶鼠和海南屋顶鼠的线粒体12S rRNA基因序列的歧异及其系统进化关系
Sequence Divergence of Mitochondrial 12S rRNA Gene and Phylogenetic Relationship Between Rattus rattus Sladeni and Rattus rattus Hainanicus
摘要
Abstract
The appearance and hair color between these two subspecies Rattus rattus Sladeni and R.r. Hainanicus are similar to each other. Their most major distinctive characteristic is the length ratio of tail to body. However, this characteristic was unstable in some measuring records. In Guangdong, R.r. Hainanicus is restrictedly distributed in the west region, and R.r. Sladeni is widely distributed in the other regions of this province. In this study, we detected the sequences of mitochondrial 12S rRNA gene fragments of 9 samples from R.r. Hainanicus and R.r. Sladeni (Longmen and Hong Kong populations). These 385 nucleotide positions of 12S rRNA gene fragment include 26 variable sites and 14 parsimony-informative sites. 3 insertion/deletion sites are observed. The phylogenetic relationships among these samples were constructed by Neighbor-joining and Maximum parsimony methods. The analysis shows that R.r. Hainanicus is more closely relative to the Longmen population of R.r. Sladeni than to the Hong Kong population of R.r. Sladeni. The sequencing analysis of 12S rRNA gene fragments is not agreement on the classification of subspecies R.r. Hainanicus inferred from the morphology and geographical distribution. The morphological variation of R.r. Hainanicus should result from the natural selection, which causes local adaptation and geographic isolation.关键词
施氏屋顶鼠/海南屋顶鼠/线粒体DNA/序列/歧异/系统进化关系Key words
Rattus rattus Sladeni/R.r.Hainannicus/mitochondrial DNA/sequence/divergence/phylogenetic relationships分类
生物科学引用本文复制引用
江庆澜,何淼,辛景禧,黄荣春,关海山..施氏屋顶鼠和海南屋顶鼠的线粒体12S rRNA基因序列的歧异及其系统进化关系[J].中山大学学报（自然科学版）,2005,44(3):82-85,4.基金项目
国家自然科学基金资助项目(30270752) （30270752）
