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- W2327229040 abstract "To provide the necessary genetic parameters for Litopenaeus vannamei breeding program, the heritabilities were estimated in the breeding process. Heritabilities were estimated for the body weight (BW), total length (TL), the body length (BL), first abdominal segment depth (FASD), third abdominal segment depth (TASD), first abdominal segment width (FASW), partial carapace length (PCL) of L. vannamei were measured in 3-5 months old. The estimates were calculated from 7 body measurements on progeny resulting from a nested mating design. 17 half-sib families and 42 full-sib families of L. vannamei were obtained by artificial assistant fertilization of 2-5 females with a single male, and the measurements were obtained 3-5 months a fter metamorphism. Point estimate for heritabilities based on the sire component were moderate, and they were 0.452±0.029, 0.368±0.025, 0.387±0.026, 0.403±0.023, 0.415±0.033, 0.441±0.028, 0.422±0.027 for BW, TL, BL, FASD, TASD, FASW and PCL at 3 month, and 0.515±0.031, 0.394±0.028, 0.409±0.028, 0.412±0.028, 0.420±0.029, 0.429±0.029, 0.415±0.028 for BW, TL, BL, FASD, TASD, FASW and PCL at 5 month, respectively, all of which differ significantly from zero (P<0.01). In troduction Genetic improvement of breeding stocks becomes increasingly important in aquaculture, even slight improvement, body weight and size magnitude would result in surprised advance when the heritability is high. In breeding programs, body size is a common performance trait at a certain age. Heritability and genetic correlation are two im portant parameters that measure the relative magnitude of additive genetic variation and co-variation. Henderson's (1973) pioneering work provided a technique that enabled the separation of genetic and environmental effects when predicting bull and cow breeding values. The technique has now dominated the analysis of data from livestock improvement schemes, both in the prediction of breeding values and the estimation of genetic parameters. Most early published estimates of genetic parameters in aquatic animal breeding have been calculated by methods of least squares or by regression of response on selection differentials (Hetzel et al, 2000; Gjedrem and Olesen, 2005; Neira et al, 2006; Maluwa and Gjerde, 2007; Rezk et al, 2009). Recently, aquatic animal breeding literature shows that the nested analysis of variance model are beginning to be used to estimate variance components in some species (Andriantahina" @default.
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- W2327229040 date "2016-01-01" @default.
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- W2327229040 title "Estimation of the Heritability for Growth Traits at 3 Months and 5 Months of Pacific White Shrimp, Litopenaeus Vannamei" @default.
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- W2327229040 doi "https://doi.org/10.2991/bst-16.2016.52" @default.
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