Genetic and Phenotypic Parameters of Performance Traits in White Leghorn Layers
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2018, Vol 8, Issue 2
Abstract
The present study was undertaken to evaluate the genetic and phenotypic parameters of economic traits, i.e. body weight at 20 weeks of age (BW20), age at first egg (AFE), egg weight (EW), egg number up to 40 and 50 (EN40, EN50) weeks of age of egg - type chickens. The data recorded on the flock of White Leghorn layers over five generations (1999-00 to 2003-04) maintained at the poultry breeding farm of Department of Animal Breeding, College of Animal Sciences, CCS HAU, Hisar was utilized for this study. The heritability estimates in different generations for BW20, EW and EN40were low to medium; for AFE were medium; and, for EN50were medium to high. The result suggested that some form of family selection to improve egg production in this flock may be used with some caution to check the undesirable decline in egg weight. Genetic and phenotypic correlations among production traits from the data pooled over generations revealed that BW20 had a positive association with AFE, EW, EN40, and EN50 at the phenotypic level. AFE and EW had a negative correlation with EN40 and EN50 at genetic and phenotypic levels. EN40 and EN50 had positive high association both at genetic and phenotypic levels. In general, standard errors of genetic correlation were higher than the estimates indicating the poor precision of genetic correlation
Authors and Affiliations
AJAY GODARA, R. P. SINGH, RAMESH KUMAR, B. S. MALIK
Keywords
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- EP ID EP343662
- DOI 10.24247/ijasrapr201819
- Views 117
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