title: Weak genetic differentiation in cobia, Rachycentron canadum from Indian waters as inferred from mitochondrial DNA ATPase 6 and 8 genes.
abstract: Cobia, Rachycentron canadum, is an economically important migratory fish distributed in tropical waters worldwide and is a candidate fish species for aquaculture practices. The genetic stock structure of R. canadum distributed along the Indian waters was identified using mitochondrial ATPase 6 and 8 genes. A total of 842 bp sequence of ATPase 6/8 genes obtained in this study revealed 15 haplotypes with mean low nucleotide diversity (π = 0.001) and high haplotype diversity (h = 0.785). AMOVA indicated the genetic differentiation of 90.47% for individuals within the population. This is well supported by co-efficient of genetic differentiation (FST) values obtained for pairwise populations that were low and non-significant with an overall value of 0.002. The parsimony network tree revealed star-like phylogeny and all the haplotypes were connected with each other by single mutational event. The findings of the present study indicated the panmixia nature of the species which can be managed as a unit stock in Indian waters.
authors.affiliation: a Peninsular and Marine Fish Genetic Resources Centre, NBFGR, CMFRI Campus , Cochin , Kerala , India .
authors.forename: Linu
authors.initials: L
authors.lastname: Joy
authors.affiliation: a Peninsular and Marine Fish Genetic Resources Centre, NBFGR, CMFRI Campus , Cochin , Kerala , India .
authors.forename: C
authors.initials: C
authors.lastname: Mohitha
authors.affiliation: a Peninsular and Marine Fish Genetic Resources Centre, NBFGR, CMFRI Campus , Cochin , Kerala , India .
authors.forename: P R
authors.initials: PR
authors.lastname: Divya
authors.affiliation: b Central Marine Fisheries Research Institute , Cochin , Kerala , India , and.
authors.forename: A
authors.initials: A
authors.lastname: Gopalakrishnan
authors.affiliation: a Peninsular and Marine Fish Genetic Resources Centre, NBFGR, CMFRI Campus , Cochin , Kerala , India .
authors.forename: V S
authors.initials: VS
authors.lastname: Basheer
authors.affiliation: c National Bureau of Fish Genetic Resources , Lucknow , Uttar Pradesh , India.
authors.forename: J K
authors.initials: JK
authors.lastname: Jena
mesh_terms: D000818:Animals; D004272:DNA, Mitochondrial / Q000235:genetics*; D014644:Genetic Variation / Q000235:genetics; D025261:Mitochondrial Proton-Translocating ATPases / Q000235:genetics; D010473:Perciformes / Q000145:classification / Q000235:genetics*; D010802:Phylogeny
chemical_list: D004272:DNA, Mitochondrial; D025261:Mitochondrial Proton-Translocating ATPases
keywords: Genetic diversity; Rachycentron canadum; mitochondrial ATPase 6/8 genes