Selection experiment for increased egg production under 23 H and 24 H light-dark cycles in the domestic fowl.
Selection experiment for increased egg production under 23 H and 24 H light-dark cycles in the domestic fowl.
复制标题
家禽23小时和24小时光暗循环下增加产蛋量的选择实验。
DOI：
10.1080/00071668908417124
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发表时间：
1989
影响因子：
2
通讯作者：
T. Komiyama
中科院分区：
文献类型：
--
作者：
M. Naito;K. Nirasawa;T. Oishi;T. Komiyama
对23-h（23 HS系）和24-h（24 HS系）光暗周期进行5代选择试验，以提高产蛋率。第5代23 HS系的产蛋率高于24 HS系，23 HS系平均产蛋间隔小于24 h的母鸡比例从基础代的15%增加到第5代的88%。产蛋率的实现遗传力23号系为0.25 ± 0.04，24号系为0.15 ± 0.05。两个品系的蛋重和壳重均下降，且23 HS品系壳重比24 HS品系下降幅度大。建议23小时光照和黑暗的方案可能是一个有效的环境选择，以提高产卵性能的人口接近一个平台的鸡蛋生产。
A selection experiment was conducted for increased rate of lay under 23-h (23 HS line) and 24-h (24 HS line) light-dark cycles over 5 generations. In generation 5, rate of lay was higher in the 23 HS line than in the 24 HS line, and the proportion of hens with mean intra-sequence intervals of less than 24 h in the 23 HS line increased to 88% in the generation 5 from 15% in the base generation. The realised heritability for rate of lay was 0.25 plus/minus 0.04 in the 23 HS line and 0.15 plus/minus 0.05 in the 24 HS line. Egg weight and shell weight decreased in both lines, and the decrease in the proportion of shell was larger in the 23 HS line than in the 24 line. It is suggested that a regimen of 23 h light and dark may be an effective environment for selection to improve the laying performance of a population approaching a plateau for egg production.