夏南正回交后代、反回交后代及南阳牛的体重、体尺对比研究——河南省泌阳县“南阳牛导入夏洛来杂交育种”项目技术报告(二报)

Comparisions of the Body Weight and Body Size of Positive and Inverse Backcross Progeny of Charolais and Nangyang Yellow Cattle and Nangyang Yellow Cattle

本研究把夏南杂交的正回交后代、反回交后代及南阳牛的体重、体尺作了比较分析。结果表明 ,初生、6、 1 2、 1 8及 2 4月龄 ,正、反回交后代公、母牛平均体重均高于同龄同性别南阳牛 ,差异均极显著 ,正回交公牛与反回交公牛相比 ,平均初生重差异不显著 ;6、1 2、1 8月龄反回交公牛平均体重明显高于正回交公牛 ,差异均极显著 ,2 4月龄平均体重差异不显著 ;正回交母牛与反回交母牛相比 ,反回交母牛平均初生体重高于正回交母牛 ,两者差异显著 ,但 6、 1 2、1 8及 2 4月龄平均体重差异不显著。

The body weights and body sizes of positive and inverse backcross progeny of Charolais and Nangyang yellow cattle and Nangyang yellow cattle were compared. The results showed that the average body weights at birth, 6 months, 12 months, 18 months and 24 months old of positive and inverse backcross cows and bulls of Charolais and Nangyang yellow cattle were all higher than those of Nanyang yellow cattle and no significant difference were found between the average birth weight of positive and inverse backcross progeny. Body weight of 6 months, 12 months, 18 months and 24 months old of inverse backcross bulls were significantly higher than those of inverse backcross bulls and no significant difference at 24 months. Compared to positive backcross cows, inverse backcross cows had a higher birth weight and no significant difference between those of 6 months, 12 months, 18 months and 24 months old.