title: Molecular phylogenetic study on few morphotypes of a patellogastropod Cellana karachiensis from northern Arabian Sea reveals unexpected genetic diversity.
abstract: A group of limpets, Cellana karachiensis, exhibiting phenotypic plasticity were examined from Gujarat coastline India, using molecular phylogeny. Previous examination of the COI genes established the presence of three different haplotypes X, Y and Z, while present study showed three more haplotypes X1, X2and Z1. Thus, a total of six COI gene haplotypes, having 99.23% to 99.85% sequence similarity, were observed with variations at six sites. Bayesian phylogenetic analysis shows divergence of lineages X-Y, X1-X2and Z-Z1. Careful observation of nucleotide alterations showed a nonrandom mutation with more A↔G and C↔T transitions between closely related species of the genus Cellana. A stretch of 17 base pair, within COI region, was marked as region with high degree of variability between species of Cellana. Results suggest that this could be the beginning of speciation, with partial or complete reproductive barrier or these are already distinct species in different stages of evolution.
authors.affiliation: a Department of Bioscience , Saurashtra University , Rajkot , Gujarat , India.
authors.forename: Sneha
authors.initials: S
authors.lastname: Joseph
authors.affiliation: a Department of Bioscience , Saurashtra University , Rajkot , Gujarat , India.
authors.forename: Bhavik
authors.initials: B
authors.lastname: Vakani
authors.affiliation: a Department of Bioscience , Saurashtra University , Rajkot , Gujarat , India.
authors.forename: Rahul
authors.initials: R
authors.lastname: Kundu
mesh_terms: D060105:Animal Shells / Q000033:anatomy & histology*; D000818:Animals; D001499:Bayes Theorem; D003576:Electron Transport Complex IV / Q000235:genetics*; D019143:Evolution, Molecular; D049851:Gastropoda / Q000033:anatomy & histology* / Q000145:classification* / Q000235:genetics; D049810:Genetic Speciation; D014644:Genetic Variation; D006239:Haplotypes; D009792:Oceans and Seas; D010802:Phylogeny; D017422:Sequence Analysis, DNA / Q000379:methods
chemical_list: D003576:Electron Transport Complex IV
keywords: Molecular phylogeny; evolution; nucleotide transitions; patellogastropod; speciation