Pavan-Kumar A. auteur aut IRD Singh S. auteur aut IRD Mishra A. auteur aut IRD Suman S. auteur aut IRD Gireesh-Babu P. auteur aut IRD Chaudhari A. auteur aut IRD Shen K. N. auteur aut IRD Borsa Philippe auteur aut IRD text journalArticle eng text/pdf born digital access The present study characterized complete mitochondrial genome of Blue-spotted maskray, Neotrygon indica and studied the evolutionary relationship of the species within the Dasyatidae family. The total length of the mitogenome was 17,974 bp including 37 genes and a non-coding control region. The average frequency of nucleotides in protein-coding genes was A: 29.1 %, T: 30.2 %, G: 13.0 % and C: 27.7 % with AT content of 59.3 %. The values of AT and GC skewness were -0.018 and -0.338, respectively. Comparative analyses showed a large number of average synonymous substitutions per synonymous site (Ks) in gene NADH4 (5.07) followed by NADH5 (4.72). High values of average number of non-synonymous substitutions per non-synonymous site (Ka) were observed in genes ATPase8 (0.54) and NADH2 (0.44). Genes NADH4L and NADH2 showed high interspecific genetic distance values of 0.224 +/- 0.001 and 0.213 +/- 0.002, respectively. Heat map analysis showed variation in codon usage among different species of the Dasyatidae family. The phylogenetic tree showed a sister relationship between the Dasyatinae and the Neotrygoninae subfamilies. Neotrygon indica formed as a sister species to the clade consisting of N. varidens and N. orientalis. Based on the present results, Neotrygon indica could have diverged from the common ancestor of the two latter in the Plio-Pleistocene. The present study showed distinct characteristics of N. indica from its congeners through comparative mitogenomics. specialized Elasmobranchs Biogeography Phylogeny Mitochondrial genome Codon bias INDE OCEAN INDIEN 034 020 223 A 458-467 2022 0141-8130 https://www.documentation.ird.fr/hor/fdi:010086675 10.1016/j.ijbiomac.2022.10.277 0141-8130 [F B010086675] https://www.documentation.ird.fr/hor/fdi:010086675 https://www.documentation.ird.fr/intranet/publi/2023-01/010086675.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-01-11 2023-01-11 fdi:010086675 fre