4.6 Article

Genetic Structure and Diversity in Wild and Cultivated Populations of the Mangrove Oyster Crassostrea gasar from Southern Brazil

Journal

MARINE BIOTECHNOLOGY
Volume 25, Issue 4, Pages 548-556

Publisher

SPRINGER
DOI: 10.1007/s10126-023-10224-5

Keywords

Bivalve mollusks; Inbreeding; Oysters; Selective breeding; Wild population

Ask authors/readers for more resources

This study investigated the genetic structure and diversity of the mangrove oyster in wild and cultivated populations in Brazil. Two main genetic groups were identified, one from cultivated populations and the other from wild populations along the southern and southeastern Brazilian coasts. Despite variability, the cultivated population showed relatively high genetic diversity values. Monitoring and establishing reference values for genetic diversity can aid in the viability of cultivated populations and the management of wild populations.
The mangrove oyster (Crassostrea gasar) is Brazil's second most cultured species and presents a high potential for aquaculture. However, artificial selection in a highly fecund species and significant variance in reproductive success can result in the loss of genetic diversity and increases the inbreeding rate, especially in cultivated populations. In this study, we investigated the genetic structure and diversity of C. gasar in wild and cultivated populations using 14 microsatellites. Spatial genetic comparisons revealed the existence of two main genetic groups of C. gasar, one comprising the population in cultivation and the other formed by wild populations along the southern and southeastern Brazilian coasts. Although no common genetic structure exists among wild populations, it is possible to observe a distribution gradient based on discriminant analysis of principal components consistent with their geographic distribution. However, it is insufficient to differentiate them genetically. Despite artificial reproduction, the genetic diversity values of the cultivated population remained relatively high and did not show a reduction. Therefore, monitoring the cultivated population and establishing reference values for genetic diversity will allow the adoption of strategies both for the viability of the cultivated population and the management of wild populations.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available