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Sci Rep:中国水产科学研究院马凌波和夏连军教授发现花蟹线粒体基因组

摘要 : 花蟹写是一种在印度洋太平洋海域出现的大型螃蟹,会游泳,由于对于其的很高的市场需求,被认为是一种该地区及其宝贵的渔业资源。不过,关于这个物种的种群遗传结构和分子演化我们了解的很少。

 花蟹写是一种在印度洋太平洋海域出现的大型螃蟹,会游泳,由于对于其的很高的市场需求,被认为是一种该地区及其宝贵的渔业资源。不过,关于这个物种的种群遗传结构和分子演化我们了解的很少。

本周《Scientific Reports》上发表了中国水产科学研究院东海水产研究所马凌波和夏连军教授的一篇文章,研究发现了第一个花蟹(Charybdis feriata)的线粒体基因组。该研究结果有助于了解花蟹和其他20多个物种之间的关系,并且有助于预测花蟹的遗传多样性。

马凌波和夏连军以及他们的研究团队描述了第一个花蟹的完整线粒体基因组,这个基因组有15600对碱基,37个基因,编码13个蛋白。该线粒体基因组的基因排列及其姊妹物种一样。研究者表示花蟹可能在61498年前到43814年前这段时间出现过种群扩张时间,在上一次间冰期之后。这可能由于是海水温度变化和海水中营养成分的变化导致的,这种变化可能也影响了其他海洋生物。

原文链接:

First mitochondrial genome for the red crab (Charybdis feriata) with implication of phylogenomics and population genetics

原文摘要:

In this study, we first described the complete mitochondrial genome for the red crab (Charybdis feriata), elucidated its phylogenetic relationship among 20 species within Decapoda, and estimated the population genetic diversity. The mitochondrial genome was 15,660 bp in size and encoded 13 protein-coding genes, 22 transfer RNA (tRNA) genes, and two ribosomal RNA genes. The gene arrangement of the mitochondrial genome was the same as that of its sister species, C. japonica. Phylogenomic analysis suggested that genus Charybdis should be classified into subfamily Portuninae but not into subfamily Thalamitinae. Moreover, a total of 33 haplotypes of complete cytochrome c oxidase subunit I gene were defined in 70 individuals of C. feriata derived from three localities. Haplotype diversity and nucleotide diversity values among three localities indicated a high level of genetic diversity in C. feriata. AMOVA analysis suggested a low level of genetic differentiation among the three localities (FST = 0.0023, P > 0.05). Neutrality tests and mismatch analysis revealed that C. feriata might have undergone a population expansion event that possibly occurred in the last 61,498 to 43,814 years. This study should be helpful to better understand the evolutionary status, and population genetic diversity of C. feriata and related species.

来源: Scientific Reports 浏览次数:0

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