海胆纲线粒体基因组特征及基因差异位点分析

Characteristics and Different Genetic Loci in Mitochondrial Genomes of Sea Urchin

研究了海胆纲6个线粒体基因组均编码后生动物标准的37个基因。6个海胆线粒体基因组的基因排列完全相同。海胆纲和球海胆属线粒体基因组13个蛋白质编码基因和2个核糖体RNA基因的差异位点分析表明,差异位点数最多的基因为nad5基因,其次为nad4基因和cox1基因。因此,在海胆纲和球海胆群体遗传学的研究中,nad5、nad4和cox1基因是理想的分子标记,用于分析海胆内部不同群体之间的遗传多样性。

The results showed that sea urchin mitochondrial genomes contain 37 standard metazoan genes.The gene order of 6 sea urchins mitochondrial genomes is identical,and also has the same gene arrangement with Aspidochirotida species（Holothuroidea）.From the polymorphism analysis of main genes（13 protein coding genes and 2 ribosomal RNA genes） in Echinoidea and Strongylocentrotus,nad5 gene has the largest number of different sites,followed by nad4 gene and cox1 gene.Therefore,nad5,nad4 and cox1 genes are ideal molecular markers in sea urchin population genetics studies applied in the analysis of genetic diversity within different groups.