Development of new quail lines with excellent in productivity and eggshell quality
2016
Yoshioka, R. | Watanabe, H. | Kino, K.
In quail production, chicks are produced in individual farms. However, in recent years, the possible risk of decreased productivity caused by inbreeding depression is alarming. As preventive measures, we developed two lines of quail, the Brown 'BB' and the wild color 'WW' whose feather colors differ from those of distant kin quails, the blood relative bred in a farm in Aichi Prefecture, Japan. 1. Selections over 17 generations were carried out primarily to improve growth, survival, egg production, and standard egg weight rates. Further, selections were carried out for 6 generations for the white bloom index, which indicates that the lime matter deposited on the eggshell surface, and the lime matter started to raise the appearance percentage of 'white bloom egg' from the 11th generation. 2. Growth and survival rates of the WW line reached the target value in the 4th generation (growth rate, 95%, and survival rate, 98%). 3. The growth rate of the BB line reached the target value (95%) in the 6th generation, and the egg production rate reached the target value (80%) in 1st generation. However, these characteristics fluctuated significantly in each generation. 4. The WW line was 14 generations and the BB line was 16 generations. The white bloom index reached the target value (2.5) at the 11th generation in both WW (61.7%) and BB (69.0%) lines to achieve the rate of the egg preferred in the market (white bloom index: 2-4). By the 17th generation, it was further improved and reached 81.2% and 77.5% in WW and BB line, respectively.
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