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

被引:0
作者
Scaranto, Bianca Maria Soares [1 ]
Ribolli, Josiane [2 ]
Vieira, Graziela Cleuza [1 ]
Ferreira, Joao Paulo Ramos [1 ]
de Miranda Gomes, Carlos Henrique Araujo [1 ]
de Melo, Claudio Manoel Rodrigues [1 ]
机构
[1] Univ Fed Santa Catarina, Dept Aquaculture, Lab Marine Mollusks, Florianopolis, Brazil
[2] Univ Fed Santa Catarina, Dept Aquaculture, Lab Biol & Cult Peixes Agua Doce, Florianopolis, Brazil
关键词
Bivalve mollusks; Inbreeding; Oysters; Selective breeding; Wild population; MASS SELECTION LINES; PACIFIC OYSTER; DISPERSAL DISTANCE; SIZE; GIGAS; SOFTWARE; IDENTIFICATION; RHIZOPHORAE; PERFORMANCE; GENERATIONS;
D O I
10.1007/s10126-023-10224-5
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
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.
引用
收藏
页码:548 / 556
页数:9
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