Estimation of genetic parameters for shell color-related traits in Pacific oyster
Heritability and genotypic and phenotypic correlations in term of specific quantitative traits can be estimated to predict the flexible of improving traits through selective breeding. A study of Wan et al., 2017 aimed to estimate those genetic parameters to improve the Pacific oyster breeding program. Thirty families of the golden shell strain of Pacific oyster were produced by applying a nested mating design consisting of 10 sires and 30 dams and used as genetic materials in the study. The shell color-related traits and growth-related traits were measured to evaluate the genetic parameters. ASReml-R 3.0 was used to data analysis. The univariate animal model was applied to evaluate the variance components and heritability. Genotypic and phenotypic correlations among shell color-related traits and growth-related traits were calculated using the bivariate model. The results from the study suggested that favourable improvement in aquatic selective breeding would be predictable for the genetic potential of the golden shell color in this strain of Pacific oyster, whereas independent selection conducted at the same time rather than correlative selection would be feasible in the improvement of both types of traits.
Wan, S., L. Qi., L. Ting., Y. Hong and K. Lingfeng. 2017. Heritability estimates for shell color-related traits in the golden shell strain of Pacific oyster (Crassostrea gigas) using a molecular pedigree. Aquaculture. 476: 65-71.