基于多鳞鱚线粒体基因组和控制区的系统发育学研究
Phylogenetics inferred from mitogenome and control region of Silver Sillago, Sillago sihama.
作者信息
Liu Dan, Guo Yusong, Wang Zhongduo, Liu Chuwu
机构信息
Key Laboratory of Aquaculture in South China Sea for Aquatic Economic Animal of Guangdong Higher Education Institutes, Fisheries College, Guangdong Ocean University, Zhanjiang 524025, People's Republic of China.
出版信息
Mitochondrial DNA. 2012 Aug;23(4):255-63. doi: 10.3109/19401736.2012.674118.
BACKGROUND AND AIMS
Sillago sihama is one of the commercially important fish species and the mitochondrial genome of S. sihama was determined.
RESULTS
The mitogenome of S. sihama is 16,599 bp in length. It contains 37 mitochondrial genes (2 ribosomal RNA genes, 22 transfer RNA genes, and 13 protein-coding genes) as found in other vertebrates. It represents the first complete mitogenome accessioned for Sillago fishes (GenBank Accession No. JQ048935). The structure and organization of the control region (D-loop) in S. sihama is similar to that of other teleost fish and vertebrates (all containing conserved sequence block and high variation block).
CONCLUSION
The phylogenetic analyses based on the mtDNA sequence of S. sihama supported a close relationship with Carangidae, consistent with taxonomic hypothesis based on morphology. Moreover, the high sequence variability of control region (haplotype diversity, H(d) = 1.000) indicated the potential utility as marker for population-level studies.
背景与目的
多鳞鱚是具有重要商业价值的鱼类之一，本研究测定了多鳞鱚的线粒体基因组。
结果
多鳞鱚的线粒体基因组长度为16,599 bp。它包含37个线粒体基因（2个核糖体RNA基因、22个转运RNA基因和13个蛋白质编码基因），与其他脊椎动物中的情况相同。这是多鳞鱚属鱼类首个登录的完整线粒体基因组（GenBank登录号：JQ048935）。多鳞鱚控制区（D-loop）的结构和组织与其他硬骨鱼类和脊椎动物相似（均包含保守序列块和高变块）。
结论
基于多鳞鱚线粒体DNA序列的系统发育分析支持其与鲹科有密切关系，这与基于形态学的分类假设一致。此外，控制区的高序列变异性（单倍型多样性，H(d)=1.000）表明其作为群体水平研究标记的潜在用途。
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