Estimation of genetic parameters of various economic traits in a closed population of female line layer type chickens under short term selection

Abstract

Abstract:The genetic parameters for various traits of economic importance were studied in a female line of chicken population under short term selection for egg production for over 2 years. The parameters studied were body weight at 20 (BW20) and 40 weeks (BW40), egg weight (EWT) and egg 280 days; and they showed mostly moderate to high heritability estimates. All these values were 0.16 to 0.

Performance of different strains of white leghorn layers

“…Heritability of BW 20 ranged from 0.16±0.08 (Jayalaxmi et al, (2010) [17] in IWK strain to 0.98±0.23 (Ahmad and [3,6] in layer strain and IWP strain. The genetic correlation of BW 20 with BW 40, AFE, EN 40, EW 40 and EM 40 ranged from 0.62±0.23 (Jayalaxmi et al, 2010) [17] in IWK to 0.96±0.07 (Qadari et al, 2013) [28] in IWP strain, -0.54±0.27 [6] in IWP to 0.42±0.25 [6] in IWP, -0.56±0.25 [6] in IWP to 0.59±0.13 (Bais et al, 2008) [5] in IWI, 0.02±0.35 (Qadari et al, 2013) [28] in IWP to 0.82±0.12 [6] in IWP and -0.26±0.28 (Qadari et al, 2013) [28] in IWP to 0.16±0.07 (Tomar et al, 2014) [36] in WLH, respectively, whereas, the phenotypic correlation ranged from 0.27 (Jayalaxmi et al, 2010) [17] in IWK to 0.77±0.01 (Tomar et al, 2014) [36] in WLH, -0.31±0.02 (Manjeet et al, 2018) [22] in WLH to 0.09 (Qadari et al, 2013) [28] in IWP, -0.11±0.05 [6] in IWP to 0.27±0.05 [6] in IWP, 0.07±0.05 [6] in IWP to 0.34±0.05 Chaudhary et al, 2009) [6,11] in IWP, IWP and WLH strain and 0.01 (Qadari et al, 2013) [28] in IWP to 0.16±0.02 (Tomar et al, 2014) [36] WLH, respectively.…”