Purushothaman P, Chakraborty Rekha Devi, Kuberan G, Maheswarudu G
Department of Biosciences, Mangalore University, Mangalagangothri 574 199, India.
J Genet. 2019 Mar;98.
The deep water penaeoid shrimp is an important commercial crustacean resource along the Indian coast. The molecular and morphological information of this group from the Indian coast is scarcely known. In this study, we investigated the identification and phylogenetic relationships of the deep water penaeoid shrimps using three mitochondrial (cytochrome oxidase subunit I (COI), cytochrome b, 16S rRNA) genes, which were compared with 54 morphological characters and further used to evaluate character evolution. Our study revealed remarkable molecular divergence (3.3-33.0%) in nine species from three genera of Solenoceridae, four species from three genera of Penaeidae and one species from Aristeidae using COI. Phylogenetic analysis using maximum likelihood and Bayesian approaches revealed that all species from these families are monophyletic. The present analysis revealed the existence of subgroups in the genus suggesting the slow reduction of postrostral carina which corresponds to the increase in distributional depth during the evolutionary process which further indicates the origin of the genus in the continental shelf and extending up to the continental slope. In addition, we generated the DNA barcode database involving these species which can help further to investigate the detailed evolution and biogeography of these valuable crustacean resources.
深水对虾是印度沿海一种重要的商业甲壳类动物资源。来自印度沿海该类群的分子和形态学信息几乎不为人知。在本研究中，我们利用三个线粒体基因（细胞色素氧化酶亚基I（COI）、细胞色素b、16S rRNA）研究了深水对虾的鉴定和系统发育关系，将其与54个形态特征进行比较，并进一步用于评估特征进化。我们的研究表明，使用COI基因，管鞭虾科三个属的九个物种、对虾科三个属的四个物种和阿里斯特虾科的一个物种存在显著的分子差异（3.3 - 33.0%）。使用最大似然法和贝叶斯法进行的系统发育分析表明，这些科的所有物种都是单系的。目前的分析揭示了该属中存在亚群，这表明后喙隆线逐渐退化，这与进化过程中分布深度的增加相对应，进一步表明该属起源于大陆架并延伸至大陆坡。此外，我们生成了包含这些物种的DNA条形码数据库，这有助于进一步研究这些有价值的甲壳类动物资源的详细进化和生物地理学。
