SELECTION RESPONSES FOR AUGMENTING EARLY GROWTH RATE IN JAPANESE QUAIL

Throughout a selection experiment, which extended over five generations: the base and four generations of for augmenting early growth rate (GR) during period from hatch to 21 days age in Japanese quail, total number 8724 birds were used: 1726 population, 5176 selected line (HGR1-21) 1822 control line. The most important results obtained as follows: Genetically, heritability (h2) all body weights (BW) showed moderate h2 ranged 0.19 0.29. GR1-21 positively correlated with weekly measured except BW at (BW1) genetic correlations (rg) 0.06 0.47, wide range phenotypic correlation (rp ) 0.18 0.52. The  GR during  different periods had medium  0.17 0.28 high rg criterion (0.15 0.70) broader rp 0.03 0.67. The HGR1-21 4th generation best performance each BW7, BW21, BW28, 1-7, 1-14, 1-28 1-35 significant differences. realized cumulative  response after was 0.063 (6.30%) GR1-21, cumulative responses s 1.19,g 23.94,g 3.10% 17.00%, respectively. So, current study aimed evaluate effectiveness program through estimation direct fast determination between either ages or GRs quail.