This study was conducted on a poultry flock during 1991–93 period (comprising of two generations) by collecting data of various economic traits namely; body weight, age at first egg, part periods, residual periods and annual egg production with an objective to investigate the various genetic parameters of a population undergoing constant over last 20 years. Heritability estimates from fullsib component of variance for body weight at 20 weeks, age at first egg and part period egg production ranged from 0.20±0.07 to 0.39:±:0.07; 0.18:±:0.07 to 0.25±0.08 and 0.08±0.20 to 0.20±0.09, respectively, in both the generations. The estimates of heritability were higher from dam component than sire component in both the generations and also in the pooled data. The heritability estimates for annual egg production of pooled data by sire component of variance was 0.15±0.09. Part period egg production have high heritability estimates than annual and residual egg production which suggest that selection should be based on early production to improve annual egg production. Body weight at 20 weeks, age at first egg and various production periods (part, annual and residual) were negatively associated at genetic and phenotypic level, whereas body weight at 20 weeks have positive phenotypic correlation with various egg production traits. The genetic correaltions between part and annual egg production, and among part, annual and residudal production were positive and high in magnitude.
White Leghorn, hertitability, genetic correlation
