Effects of genotype × environment interaction on the estimation of genetic parameters and gains in Nile tilapia.

Autor: de Araújo FCT; PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish, Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil.; Graduate Program in Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil., de Oliveira CAL; PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish, Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil.; Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil., Campos EC; PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish, Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil. eric.peixegen@gmail.com.; Graduate Program in Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil. eric.peixegen@gmail.com., Yoshida GM; Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av Santa Rosa 11735, Santiago, Chile., Lewandowski V; Faculty of Agrarian Science, Federal University of Grande Dourados, Rodovia Dourados-Itahum km 12, Dourados, Mato Grosso do Sul, Brazil., Todesco H; PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish, Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil.; Graduate Program in Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil., Nguyen NH; GeneCology Research Centre, School of Science and Engineering, University of the Sunshine Coast, Maroochydore, QLD 4558, Australia., Ribeiro RP; PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish, Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil.; Department of Animal Science, State University of Maringá, Avenida Colombo 5790, Maringá, Parana, Brazil.
Jazyk: angličtina
Zdroj: Journal of applied genetics [J Appl Genet] 2020 Dec; Vol. 61 (4), pp. 575-580. Date of Electronic Publication: 2020 Aug 19.
DOI: 10.1007/s13353-020-00576-2
Abstrakt: Nile tilapia (Oreochromis niloticus) is the major fish species produced in Brazil, a country with a vast territory and great climate diversity. This study assessed the effects of the genotype × environment interaction on heritability estimates and selection responses in Nile tilapia (Tilamax strain) cultivated in earthen ponds and net cages. The weight at harvest, trunk length, and head percentage of 4400 individuals were determined. Trait heritabilities were higher in pond fish (0.27-0.52) than in caged fish (0.09-0.33). Genetic correlations between farming systems were lower than 0.5 for the three traits. The rank position of the top 10 families differed according to the environment, as did the response to direct and indirect selection. The results revealed significant genotype × environment effects on the heritability of Nile tilapia farmed under different systems.
Databáze: MEDLINE
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