Genetic Parameter Estimation on Pra Production Traits of Alabio and Mojosari Ducks After Selection Based on Egg Production in Two Generation

Abstract

This experiment was conducted to analyze the genetics parameter of preproduction traits of Alabio and Mojosari Ducks after two generation selection for laying line.  Alabio and Mojosari Ducks were selected 20 males and 200 females, respectively, as twice generation and placed in group mating for egg production. All collected eggs were hatched to find about  450 of Alabio and  520  of Mojosari  female ducklings.  All birds were individually identification, based of group lines mating of the pwerents. Ducklings were rewered and weight two weekly interval of 16 weeks and old of sexual maturities. Data were collected followed on half- and full-sib nested design. Collected data were egg weight, body weight of day, 2, 4, 6, 8, 10, 12, 14, 16 weeks old ducks, sexual maturity and age of sexual maturity. Estimated genetic parameter of heritability (h²±s_h²) was estimated based on variance components of half-sib and full sib. The result showed that on half sib estimation of the h²±s_h² of body weight and age of sexual maturity of Alabio (0.89 ± 0.26 and 0.35 ± 0.20) was higher than Mojosari (0.48 ± 0.21and 0.59 ± 0.23 ducks. On full sib estimation, Alabio also had a higher h²±s_h² on body weight of sexual maturity (0.88 ± 0.32) than Mojosari (0.45 ± 0.16 ), but lower on age of sexual maturity, 0.28 ± 0.25  and 0.59 ± 0.16,respectively. On egg and body weight of dod, 2, 4, 6, 8, 10, 12, 14 and 16 weeks of age, shown that h²±s_h² on half sib estimation of Alabio were 1.07±0.28, 0.47±0.22, 0.24±0.18, 0.25±0.20, 0.49±0.22, 0.44±0.22, 0.02±0.12 0.42±0.21, 0.43±0.21 and 0.55±0.23 compared to Mojosari 0.84±0.25, 0.41±0.20, 0.08±0.14, 0.63±0.25, 0.25±0.18, 0.10±0.17, 0.04±0.13, 0.11±0.15, 0.03±0.12 and 0.15±0.15, respectively. On full sib estimation of h²±s_h² of Alabio, respectively were  0.81±0.36, 0.18±0.19, 0.27±0.13, 0.52±0.29, 0.32±0.20, 0.48±0.20, -0.04±0.07, 0.29±0.18, 0.24±0.18 and  0.36±0.22 its lower compwered to Mojosari, respectively, 0.85±0.30, 0.31±0.17, 0.14±0.07, 0.28±0.30, 0.23±0.13, 0.12±0.11, 0.05±0.06, 0.09±0.09,  0.001±0.06 and 0.13±0.10.