摘要
以北京鸭3个群体为研究材料,分析了北京鸭初生重对生长速度和屠宰性状的影响。结果显示,北京鸭的初生重对生长速度和屠宰性状均有影响,初生重大于57.5g的2组在6周龄体重显著高于体重小于57.5g的2组,屠体重、胸肌重、全净膛重、胸肌率虽然有随着初生重增大的趋势,但只有体重大于60g的一组和其他组差异达到显著水平,初生重只对前期(0～4周龄)绝对生长速度有影响,而后期无影响;相对生长速度虽然有随着体重增加减少的趋势,但差异并未达到显著水平。结果表明:对初生重的高强度选择可以对北京鸭生长性状和屠宰性状产生影响,特别是以旨在提高6周龄体重为目的而对初生重进行选择时将取得良好效果。
One hundred Peking ducks of 3 lines,half males and half females were selects randomly for determining carcass traits,growth rate and the effect of birth weight. The result showed：The birth weight of Peking duck influenced the growth rate and carcass traits,the groups which newborn weight more than 57.5 g had higher the body weight after 6 weeks age than groups which were less than 57.5 g （P〈0.05）. Carcass weight,chest muscle weight, eviscerated weight and chest muscle rate showed the trend increase with birth weight increasing,but the difference only in-the group which birth weight more than 60g （P〈0.05）. The birth weight influenced the protophase absolute growth rate （during 4 weeks age） and had no effect on the anaphase absolute growth rate. The relative growth rate showed the trend which significantly decreased with the birth weight decreasing. The selection breeding for birth weight influenced on growth traits and carcass traits in Peking duck, which can improve carcass weight, chest muscle weight, eviscerated weight, and abdominal fat weight.
出处
《中国家禽》
北大核心
2008年第10期10-12,17,共4页
China Poultry
基金
国家“十一五”科技支撑计划“优质高产家禽新品种选育”资助项目(2006BAD01A09)
关键词
北京鸭
初生重
生长速度
屠宰性能
Peking duck
birth weight
growth rate
carcass trait
