丝毛乌骨鸡冠型类别与生产性能的关系分析

对引入甘肃兰州的同日龄４７周龄９８羽单冠、１４２羽复冠乌骨鸡进行了为期１８７天的饲养对比试验，对不同冠型鸡的产蛋量、蛋重、采食量、体重、体尺进行了测定，并对群体中单复冠的遗传规律进行了分析。表明乌骨鸡单冠比例与其他鸡品种的冠型遗传规律相一致；单冠鸡各项生产指标与生活力均优于复冠鸡。

Relationship Between Comb Type and Production Performance of Silkie

The feeding trial for 187 days was made using 98 introducedsilkies of single comb type contrasting to 142 ones of double comb type.The two groups of silkies were the same age at 47 weeks,The laying per-formance, egg size, feed intake,body weight and measurement were deter-mined and compared.The rule of comb type inheritance was also analysed.The results showed that the heritable ratio of single and double comb typeof silkies was in line witli other chicken breeds,Single comb type had hi-gher performance in all production trait than double.The idea that set updifferent strains according to comb type is put forward and discussed.