Allozymic variation and differentiation in the chilean blue mussel, Mytilus chilensis, along its natural distribution

Genetics and Molecular Biology

Jorge E. Toro¹  Grace C. Castro¹  Johana A. Ojeda¹  Ana M. Vergara¹ 

[1] ,Universidad Austral de Chile Instituto de Biología Marina Dr. Jürgen Winter Valdivia,Chile

关键词: allozyme;    Mytilus chilensis;    population genetics;    gene flow;    Chile;   

DOI  :  10.1590/S1415-47572006000100031

来源: SciELO

【 摘 要 】

Genetic differentiation in the Chilean blue mussel Mytilus chilensis (Hupé 1854) was investigated based on the variation in the allozyme frequencies of Pgm, Gpi, Icd, Me, Gsr, Lap and Pep in eight samples collected along 1800 km from Arauco (VIII Region) to Punta Arenas (XII Region). Despite the large geographic separations, values of Neis unbiased genetic distance, D (0.004-0.048) and standardised genetic variation among populations, Fst (0.011-0.055) were small. The levels of gene flow (Nm = 8) found in this study prevent the effect of differentiation among populations by genetic drift. This findings indicate that its long-lived planktotrophic larvae provides this species with considerable dispersal ability throughout its range which is favoured by the ocean currents along the chilean coast. In terms of management of the M. chilensis fishery, the results provide no evidence for discrete stocks, with the possible exception of the Punta Arenas population. Considering the intensive aquaculture activities with this species the present study provide preliminary data which can be used as a baseline for further characterization and /or monitoring these mussel populations.

【 授权许可】

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