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Genetic parameters for body weight in meat quail.
A Barbieri1, R K Ono2, L L Cursino1
1São Paulo State University "Júlio de Mesquita Filho", Dracena, São Paulo, 17900-000, Brazil.
Poultry Science
|January 16, 2015
Summary
This study estimated genetic parameters for body weight (BW) in meat quail. Selecting for BW at 28 days offers effective genetic progress for BW at 42 days.
Area of Science:
- Animal Science
- Genetics
- Poultry Science
Background:
- Body weight (BW) is a crucial trait in meat quail production.
- Understanding genetic parameters is essential for effective breeding programs.
Purpose of the Study:
- To estimate genetic parameters for body weight (BW) in meat quail across different ages.
- To evaluate the genetic correlations between BW at various developmental stages.
- To determine the optimal age for selection to maximize genetic gain.
Main Methods:
- Utilized 24,382 weight records from 3,652 quail (2009-2011).
- Measured weekly BW from hatch to 42 days of age.
- Employed restricted maximum likelihood (REML) with a multivariate animal model.
Main Results:
- Heritability estimates for BW ranged from 0.03 to 0.23.
- Genetic correlations for BW between different ages were predominantly high and positive.
- Selection for BW at 28 days showed significant indirect genetic progress for BW at 42 days.
Conclusions:
- Genetic parameters for BW in meat quail vary with age.
- Early selection (28 days) is a viable strategy for improving later BW (42 days).
- These findings support informed breeding decisions in meat quail production.
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