A comprehensive analysis of three Asiatic black bear mitochondrial genomes (subspecies ussuricus, formosanus and mupinensis), with emphasis on the complete mtDNA sequence of Ursus thibetanus ussuricus (Ursidae)

Dae-sik Hwang, Jang‐Seu Ki, D. Jeong, Boa Kim, Bae-Keun Lee, Sang-Hoon Han, Jae-seong Lee
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引用次数: 53

Abstract

In the present paper, we describe the mitochondrial genome sequence of the Asiatic black bear (Ursus thibetanus ussuricus) with particular emphasis on the control region (CR), and compared with mitochondrial genomes on molecular relationships among the bears. The mitochondrial genome sequence of U. thibetanus ussuricus was 16,700 bp in size with mostly conserved structures (e.g. 13 protein-coding, two rRNA genes, 22 tRNA genes). The CR consisted of several typical conserved domains such as F, E, D, and C boxes, and a conserved sequence block. Nucleotide sequences and the repeated motifs in the CR were different among the bear species, and their copy numbers were also variable according to populations, even within F1 generations of U. thibetanus ussuricus. Comparative analyses showed that the CR D1 region was highly informative for the discrimination of the bear family. These findings suggest that nucleotide sequences of both repeated motifs and CR D1 in the bear family are good markers for species discriminations.
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3个亚洲黑熊(乌苏里亚种、福尔摩沙亚种和穆普尼亚种)线粒体基因组的综合分析,重点研究了熊科熊科熊(Ursus thibetanus ussuricus)线粒体dna的全序列。
本文描述了亚洲黑熊(Ursus thibetanus ussuricus)的线粒体基因组序列,重点介绍了控制区(CR),并与线粒体基因组比较了熊之间的分子关系。家鼠线粒体基因组序列大小为16700 bp,大部分结构保守(13个蛋白编码基因、2个rRNA基因、22个tRNA基因)。CR由F、E、D、C盒等典型保守结构域和一个保守序列块组成。在不同的熊种中,CR的核苷酸序列和重复基序是不同的,它们的拷贝数也随着种群的不同而变化,即使在U. thibetanus ussuricus的F1代内也是如此。对比分析表明,CR D1区对熊科的鉴别具有较高的信息性。这些发现表明,熊科中重复基序和CR D1的核苷酸序列是物种区分的良好标记。
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