首页 | 本学科首页   官方微博 | 高级检索  
     


Mitochondrial genome nucleotide substitution pattern between domesticated silkmoth, Bombyx mori, and its wild ancestors, Chinese Bombyx mandarina and Japanese Bombyx mandarina
Authors:Li Yu-Ping  Song Wu  Shi Sheng-Lin  Liu Yan-Qun  Pan Min-Hui  Dai Fang-Yin  Lu Cheng  Xiang Zhong-Huai
Affiliation:College of Bioscience and Biotechnology, Shenyang Agricultural University, Liaoning, Shenyang China.
Abstract:Bombyx mori and Bombyx mandarina are morphologically and physiologically similar. In this study, we compared the nucleotide variations in the complete mitochondrial (mt) genomes between the domesticated silkmoth, B. mori, and its wild ancestors, Chinese B. mandarina (ChBm) and Japanese B. mandarina (JaBm). The sequence divergence and transition mutation ratio between B. mori and ChBm are significantly smaller than those observed between B. mori and JaBm. The preference of transition by DNA strands between B. mori and ChBm is consistent with that between B. mori and JaBm, however, the regional variation in nucleotide substitution rate shows a different feature. These results suggest that the ChBm mt genome is not undergoing the same evolutionary process as JaBm, providing evidence for selection on mtDNA. Moreover, investigation of the nucleotide sequence divergence in the A+T-rich region of Bombyx mt genomes also provides evidence for the assumption that the A+T-rich region might not be the fastest evolving region of the mtDNA of insects.
Keywords:nucleotide substitution pattern   mitochondrial genome   Bombyx mori   Chinese Bombyx mandarina   Japanese Bombyx mandarina
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号