Significant genetic differentiation among populations of Anomalocardia brasiliana (Gmelin, 1791): a bivalve with planktonic larval dispersion

Genetics and Molecular Biology

Cinthya Cristina Bulhões Arruda²  Colin Robert Beasley¹  Marcelo Vallinoto¹  Nelane Do Socorro Marques-silva²  Claudia Helena Tagliaro² 

[1],Universidade Federal do Pará Campus Universitário de Bragança Instituto de Estudos CosteirosBragança PA ,Brazil

关键词: mtDNA;    COI;    population;    Anomalocardia brasiliana;    conservation;   

DOI  :  10.1590/S1415-47572009000200033

来源: SciELO

【 摘 要 】

Four Brazilian populations of Anomalocardia brasiliana were tested for mutual genetic homogeneity, using data from 123 sequences of the mtDNA cytochrome oxidase c subunit I gene. A total of 36 haplotypes were identified, those shared being H3 (Canela Island, Prainha and Acupe) and both H5 and H9 (Prainha and Acupe). Haplotype diversity values were high, except for the Camurupim population, whereas nucleotide values were low in all the populations, except for that of Acupe. Only the Prainha population showed a deviation from neutrality and the SSD test did not reject the demographic expansion hypothesis. Fst values showed that the Prainha and Acupe populations represent a single stock, whereas in both the Canela Island and Camurupim stocks, population structures are different and independent. The observed structure at Canela Island may be due to the geographic distance between this population and the remainder. The Camurupim population does not share any haplotype with the remaining populations in northeastern Brazil. The apparent isolation could be due to the rocky barrier located facing the mouth of the Mamanguape River. The results highlight the importance of wide-scale studies to identify and conserve local genetic diversity, especially where migration is restricted.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License