Genetic parameters and genetic trend of body weight, body length and chest girth traits on duck line V22
Data of 3.913 ducks of V22 meat-type line selected to stabilize body weight through 4 generations from the year 2016 – 2019 at VIGOVA duck breeding farms were analyzed to evaluate the genetic ability, phenotypic and genetic trend of body weight, body length and chest girth at 7 weeks of age for selection purpose. Genetic parameters were estimated by using REML in VCE6.0.2 with multiple trait animal model. Breeding values were estimated by using BLUP method in PEST 4.2.3 with multiple trait animal model. Genetic and phenotypic trends were analyzed by linear regression on Excel 2016 software. Heritability coefficients of body weight, body length and chest girth at 7 weeks of age were 0.43, 0.33 and 0.33 respectively. Correlations between the three traits were all positive. The genetic correlation (rG) between body weight and body length was 0.59, between body weight and chest girth was 0.75 and between body length and chest girth was 0.71. The genetic trend showed the result of selection to stablize the body weight at 7 weeks of age of V22 line ducks as the average increase of body weight was 5.84 g per generation.
