Np. Singh et al., HERITABILITIES OF AND CORRELATIONS AMONG PART AND ANNUAL TRAITS IN PURE-LINE AND CROSS-LINE WHITE LEGHORNS, Indian Journal of Animal Sciences, 66(8), 1996, pp. 806-810
Genetic analysis of pure-and strain-cross pullets of White Leghorns in
dicated higher heritability in crosses than in pures for 72-weeks body
weight egg number of 72-weeks and egg weight at 36-38 weeks of age. T
he estimates were also slightly higher in crosses for egg number to 40
-weeks and egg weight at 68-70 weeks of age. The genetic correlations
of body weight with egg number and egg weight, and between part-and an
nual-egg production were stronger in crosses than in pures. However, t
he genetic correlations of egg number with egg weight varied inconsist
ently between puns and crosses.