Journal
BRITISH POULTRY SCIENCE
Volume 55, Issue 3, Pages 298-304Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00071668.2014.925088
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1. The objectives of the present study were to estimate heritability and genetic correlations for feed efficiency and body weight (BW) in Japanese quail.2. Recorded traits during different weeks of the growing period were BW from hatch to 35d, feed intake (FI), feed conversion ratio (FCR) and residual feed intake (RFI) from hatch to 28d of age.3. Genetic parameters were estimated by restricted maximum likelihood method using ASREML software. The results showed that heritability estimates for BW ranged from 0.11 to 0.22, and maternal permanent environmental effect was the highest at hatch (0.45). FCR, RFI and FI showed moderate heritabilities ranging from 0.13 to 0.40.4.Genetic correlations of BW28 with FI0-28 (0.88) and RFI0-28 (0.1) and genetic correlation of FI0-28 with FCR0-28 (0.13) and RFI0-28 (0.52) were positive. A negative genetic correlation was found between BW28 and FCR0-28 (-0.49). There was a high positive genetic correlation (0.67) between RFI0-28 and FCR0-28.5. In conclusion, selection for increased BW and reduced FI in a selection index could be recommended to improve feed efficiency traits including FCR and RFI in Japanese quail.
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