Effect of divergent selection body weight to egg production during the six generation and GH gene polymorphism quail (Coturnix coturnix japonica)

Abstract

The research aimed to study the effect of divergent selection four weeks of age body weight to the egg production of quail eggs (Coturnix coturnix japonica) and GH gene polymorphism was done for six generations. Selection descendants for six generations done the same phenotype in each generation were divergent for high and low body weight. Identification of GH gene polymorphism in 72 male quail samples selected for six generations and 100 female quail samples as a control group at the end of the study. Data of body weight and egg production from generation to generation factor analysis of variance based, high and low weight with replication based on group of males. The results showed that the difference between high and low due to divergent selection were significantly different from earlier generations (P < 0.05) higher weight groups where egg production was lower compared with the low weight group. Effect of divergent selection on egg production was obtained from the value of genetic correlation and phenotypic correlation between body weight with egg production results negatively correlated. GH gene polymorphism effected on the characteristics of body weight at 100 male quail AA genotype control group of 38 (38%), genotypes AB 45 (45%) and BB genotypes in 17 (17%). The selection group of samples 72, genotypes AA 30 (41.6%), genotypes AB 22 (30.5%) and genotypes BB 20 (27.7%). Polymorphic genes GH was known from the acquisition of different fragment sizes among genotype AA was sized 539 bp and 237 bp with an average of 79 grams weight and grain egg production 10, genotype AB was sized 776 bp, 539 bp and 237 bp with an average weight 73 grams and egg production 14 and BB was sized 776 bp with an average of 65 grams weight and grain egg production 17.