DOI: 10.36347/sjavs.2019.v06i04.002

Pages: 128-134

The research was undertaken to develop quails for high egg producer’s large sized egg using selection through exchange the male. From the base population (100 male and 400 female) the foundation stock and their next generations produced keeping a steady state population (10 male and 40 female) through the Osborne selection index. The selection criteria in the selection index were the egg production and egg weight. In addition, other traits like age and weight at sexual maturity, mature live weight, feed intake, mortality and different egg quality traits were also studied. It observed that the male attained earlier maturity than female and female were heavier than male. From an initial population for successive generations subjected to selection both egg production (72.97±6.28 to 150±4.70/quail/year) and egg weight (8.37±0.0614 to 9.95±0.047g) has been improved. Fertility and hatchability of quails in all generations was enhanced and the incubation period was 19 days. Among the egg quality characteristics the albumin and yolk ratio was 1:1 and the shape index and the Haugh unit stayed 79 to 86 and 89 to 96%, respectively. The correlations of live weight with other traits showed positive. It could be seen that subjected to select in the successive generations the traits of Japanese quails improved.