Evaluation of production performance of purebred strains of White Leghorn and their crosses
B.S. MALIK, DIDAR SINGH AND R.P. SINGH
Department of Animal Breeding CCS HAU, Hisar – 125 004
Data on production traits recorded on 755 pullets of four genetic groups (H, C, HxC, CxH) were analyzed. Body weight at 20 weeks of age was 1176 ±11.55, 1174 ±11.56, 1081 ±10.00 and 1062 ±7.77 g respectively. The pullets matured at the age of 151.9 ±0.51, 152.0 ±0.47, 152.2 ±1.28 and 152.9 ±1.20 days and laid 84.50 ±0.76, 83.42 ±0.69, 83.46 ±1.79 and 82.94 ±1.48 eggs up to the age of 40 weeks, respectively. The average egg weight at 40 weeks of age of these groups was 54.68 ±0.15, 54.05 ±0.14, 54.71 ±0.24 and 53.45 ±0.21 g, respectively. The purebred H and C strains were statistically similar in all performance traits. Similarity between the two reciprocal crosses (HxC and CxH) were observed for all traits except egg weight, where HxC cross produced heavier eggs than CxH cross. The crossbred pullets were lighter than the purebred’s at 20 weeks of age. Results were indicative of the fact that to produce hybrid layer, select the H strain for egg weight mainly along with egg number while for C strain, the emphasis should be more on egg number. So, to accomplish this, there is need to develop a criterion of selection for selection of breeders of H and C strains based on their own performance and also their crossbred (HxC) sib’s performance.