Heritabilities, genetic and phenotypic correlations for body weight in dwarf broiler birds

摘要

The data on 537 dwarf broiler birds, progeny of 15 sires and 63 dams maintained in the Department of Poultry Science, Veterinary College, Jabalpur were utilized for the present study. The data after correction for hatch effect were used to estimate the genetic parameters. The traits measured were 4 weeks body weight (gms.), 6, 8 weeks, gain in weight from 4-6 and 6-8 weeks. The heritability estimates for 4. 6 and 8 weeks body weight from sire + dam component of variance ranged from 0.243+-0.108 to 0.374+-0.134 and that of gain in weight from 4-6 and 6-8 weeks were 0.231 +- 0.104 and 0.267+-0.113 respectively. The genetic correlations among various body Weights ranged from 0.692 to 0.841, while phenotypic correlations varied from 0.732 to 0.803.3. The genetic and phenotypic correlations between gain in weight from 4-6 and 6-8 weeks with various body weights ranged from 0.032 to 0.80 and 0.107 to 0.839 respectivey.