Abstract
A study was undertaken to evaluate the genetic parameters of some egg production traits in the Japanese quail. Two hundred and five quail hens were investigated for the traits under study. The mixed Model Least-squares and Maximum Likelihood Computer Programme of Harvey (1990) was applied to estimate heritability, genetic and phenotypic correlations of the egg production traits. The mean bodyweight at first egg was 145.68±0.74g. Mean age at first egg was 47.01±0.23 days while the average number of eggs laid per quail hen per year was 248. The egg production traits studied had low to moderate heritabilities with high standard errors. Part-period egg number had high and positive genetic correlation with age at first egg, annual egg number and annual egg mass. It was concluded that the egg production traits studied could best be improved through crossbreeding and family selection methods, and selection for part-period egg number could possibly improve annual egg number and reduce generation interval.
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