Genetic and phenotypic parameters in egg type chicken
2014
Tomar, A.K. | Poonia, J.S. | Chaudhari, M. | Kumar, P. | Rani, M.
The present study was undertaken to find out the effect of hatch and generation on performance traits i.e. body weight at 20 weeks of age (BW20), age at first egg (AFE), egg weight at 40 weeks of age (EW40), egg number upto 40 weeks of age (EN40), body weight at 40 weeks of age (BW40) and egg mass upto 40 weeks of age (EM40). The data, on 2416 pullets, progenies of 252 sires of White Leghorn over five generations (2008–09 to 2012–13), maintained at the poultry breeding farm of Department of Animal Genetics and Breeding, LUVAS, Hisar, were utilized for the present study. The effect of hatch within a generation and generation was significant (P d” 0.01) on BW20, AFE, EW40, EN40, BW40 and EM40. The pooled estimates of heritability were observed as 0.494±0.079, 0.355±0.078, 0.494±0.075, 0.314±0.080, 0.364±0.078 and 0.246±0.073 for BW20, AFE, EW40, EN40, BW40 and EM40, respectively. BW20 was positively correlated with EW40, EN40, BW40, EM40 and negatively with AFE at both genetic and phenotypic scale. AFE was positively correlated with EW40 and negatively correlated with EN40, BW40 and EM40 on both genetic and phenotypic scale. EW40 was negatively correlated with EN40 and positively correlated with BW40 and EM40 on genetic and phenotypic scale. EN40 was positively correlated with EM40 on both genetic and phenotypic scale, while negatively correlated with BW40 at genetic level. The genetic and phenotypic correlations were positive with low magnitude between BW40 and EM40.
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