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High Sequence Variations in Mitochondrial DNA Control Region among Worldwide Populations of Flathead Mullet Mugil cephalus

机译:世界范围内的扁平头Mul鱼Mugil cephalus人口线粒体DNA控制区的高序列变异。

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摘要

The sequence and structure of the complete mtDNA control region (CR) of M. cephalus from African, Pacific, and Atlantic populations are presented in this study to assess its usefulness in phylogeographic studies of this species. The mtDNA CR sequencevariations among M. cephalus populations largely exceeded intraspecific polymorphisms that are generally observed in other vertebrates. The length of CR sequence varied among M. cephalus populations due to the presence of indels and variable number of tandem repeats at the 3' hypervariable domain. The high evolutionary rate of the CR in this species probably originated from these mutations. However, no excessive homoplasic mutations were noticed. Finally, the star shaped tree inferred from the CR polymorphism stresses a rapid radiation worldwide, in this species. The CR still appears as a good marker for phylogeographic investigations and additional worldwide samples are warranted to further investigate the genetic structure and evolution in M. cephalus.
机译:来自这项研究的非洲,太平洋和大西洋种群的头颅分枝杆菌的完整mtDNA控制区(CR)的序列和结构,旨在评估其在该物种的系统地理学研究中的有用性。头颅分枝杆菌种群中的mtDNA CR序列变异大大超过了其他脊椎动物中普遍观察到的种内多态性。由于存在插入缺失和在3'高变域的串联重复序列的数目可变,因此在颅脑分枝杆菌种群中CR序列的长度是变化的。该物种中CR的高进化率可能源自这些突变。然而,没有发现过多的同质性突变。最后,从CR多态性推断出的星形树强调了该物种在全球范围内的快速辐射。 CR仍然可以作为系统地理学研究的良好标记,并且有必要在世界范围内提供更多样本,以进一步研究头颅分枝杆菌的遗传结构和进化。

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