摘要
以 6种日粮饲喂 5个鸡种 (含 2个正反交组合 ) ,测定初生至 1 2周龄体重 ,用 Gompertz模型估计生长曲线参数 ,分析鸡种、日粮对生长曲线参数的影响 ,计算生长曲线参数的遗传力。结果表明 :鸡种、性别、日粮能量、日粮粗蛋白对成熟体重影响极显著 (P<0 .0 1 ) ;鸡种、性别、日粮能量对初生重估计值有极显著影响 (P<0 .0 1 ) ;鸡种、性别对平均生长速率参数有极显著影响 (P<0 .0 1 ) ,日粮能量对生长速率参数有显著影响 (P<0 .0 5 ) ;不同鸡种生长曲线参数的遗传力有一定差别 ,成熟体重除隐性白羽鸡为低等遗传力外 ,仙居鸡与固始鸡均为中等遗传力 ,初生重估计值的遗传力除隐性白羽鸡为高遗传力外 ,仙居鸡与固始鸡均为中等遗传力 ,而平均生长速率参数的遗传力为 0 .1 9～ 0 .
Five chicken breeds fed on six different feeds were weighted every week from 0 to 12 weeks. Growth parameters of Gompertz model and effects of feed and breed on growth and heredity of growth parameters were estimated. The results were as follows: Effects of breed, sex and energy, protein, content on adult body weight were very significant; Effects of breed, sex and energy on birth body weight were also very significant. Effects of breed and sex on parameter of mean growth rate were very significant, and effect of energy level was significant. There were differences among heredity of different breeds; adult body weight was of middle heredity but for recessive white chickens was low; birth body weight of Xianju and Gushi was of middle heredity but for recessive white chickens was high; and the hereterbility of parameter of mean growth rate was 0.19～0.42.
基金
江苏省应用基础项目 (BJ9710 0 )
