ORIGINAL ARTICLE

A breeding program for Nile tilapia in Brazil: Results from nine generations of selection to increase the growth rate in cages

Grazyella Massako Yoshida

Grazyella Massako Yoshida

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile

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Carlos Antonio Lopes de Oliveira

Carlos Antonio Lopes de Oliveira

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Department of Animal Science, State University of Maringá, Maringá, Brazil

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Eric Costa Campos

Corresponding Author

Eric Costa Campos

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Center of Agrarian Sciences, Department of Animal Science, Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

Correspondence

Eric Costa Campos, Graduate Program in Animal Science, State University of Maringá, CEP 87020-900, PR, Brazil.

Email: eric.peixegen@gmail.com

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Humberto Todesco

Humberto Todesco

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

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Filipe C. T. Araújo

Filipe C. T. Araújo

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

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Hanner Mahmud Karin

Hanner Mahmud Karin

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

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Aline M. S. O. Zardin

Aline M. S. O. Zardin

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

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Jailton S. Bezerra Júnior

Jailton S. Bezerra Júnior

Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil

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Luiz Alexandre Filho

Luiz Alexandre Filho

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Department of Animal Science, State University of Maringá, Maringá, Brazil

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Lauro Vargas

Lauro Vargas

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Department of Animal Science, State University of Maringá, Maringá, Brazil

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Ricardo Pereira Ribeiro

Ricardo Pereira Ribeiro

PeixeGen Research Group - Management, Breeding and Molecular Genetics of Freshwater Fish Farming, Department of Animal Science, State University of Maringá, Maringá, Brazil

Department of Animal Science, State University of Maringá, Maringá, Brazil

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First published: 22 September 2021
Citations: 1

Abstract

Variance components and heritabilities for daily weight gain (DWG) were estimated for Nile tilapia farmed in cages across nine generations (G1–G9) of selection in a breeding program in Brazil. DWG was measured in 16,272 accumulated tagged animals representing 535 full- and half-sib families of Nile tilapia under cage farming. The additive genetic variance showed a slight variation (0.051–0.066), and heritability estimates ranged from 0.20 to 0.33. The common environmental effect accounted for a higher proportion of the total variance in DWG, especially in the last generations (6%–24%). A genetic trend based on all data available showed a substantial increase in the DWG (about 3.3% per generation) of Nile tilapia across nine generations of selection. Furthermore, our results demonstrate ample scope for further genetic improvement.

CONFLICT OF INTEREST

The authors declare no conflict of interest related to this study.

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