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

Autor: Yoshida GM; 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., de Oliveira CAL; 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., Campos EC; 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., Todesco H; 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., Araújo FCT; 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., Karin HM; Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil., Zardin AMSO; Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil., Bezerra Júnior JS; Graduate Program in Animal Science, State University of Maringá, Maringá, Brazil., Filho LA; 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., Vargas L; 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., Ribeiro RP; 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.
Jazyk: angličtina
Zdroj: Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und Zuchtungsbiologie [J Anim Breed Genet] 2022 Mar; Vol. 139 (2), pp. 127-135. Date of Electronic Publication: 2021 Sep 22.
DOI: 10.1111/jbg.12650
Abstrakt: 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.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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