摘要： 开展了杜泊公羊与小尾寒羊母羊杂交育种研究,对自群繁育后代早期增重、生长发育、繁殖性能进行了测定,结果显示,自群繁育后代3月龄公、母羊体重分别为27.36 kg和22.88 kg,较小尾寒羊分别高6.98 kg和7.20 kg,3月龄日增重分别为272.56 g和227.44 g,较小尾寒羊分别高78.67 g和80.77 g,6月龄体重分别为48.46 kg和40.56kg,较小尾寒羊分别高13.9 kg和15.53 kg,6月龄日增重分别为253.50 g和211.94 g,较小尾寒羊分别高75.67 g和86.67 g(P<0.01),自群繁育后代3月龄、6月龄和成年胸宽、胸围和大腿围均显著大于小尾寒羊;自繁后代下半年各月份自然发情比例高于上半年,胎均产羔数为1.76。结果表明,自群繁育后代早期增重显著好于小尾寒羊,肉用体型较小尾寒羊显著改善,繁殖产羔率较杜泊羊有所提高,发情呈现一定季节趋势。

关键词: 肉羊, 自群繁育后代, 生产性能, 日增重

Abstract: The study of hybrid breeding was conducted through Dorper ram associated with Small Tail Han Sheep ewe in this paper.The early gain weight,growth and reproduction performance of inter-mating breed offspring were measured.The results showed that the third month body weight of ram and ewe was 27.36 kg and 22.88 kg respectively,which was 6.98 kg and 7.20 kg more than those from Small Tail Han Sheep respectively.Three month daily gain was 272.56 g and 227.44 g,which was 78.67 g and 80.77 g more than those from Small Tail Han Sheep respectively.The Sixth month body weight was 48.46 kg and 40.56 kg,which was 13.9 kg and 15.53 kg more than those from Small Tail Han Sheep respectively.Six month daily gain was 253.50 g and 211.94 g,which was 75.67 g and 86.67 g more than those from Small Tail Han Sheep respectively.Chest breadth and chest circumference,thigh circumference of the third,sixth month and adult inter-mating breed offspring were more than Small Tail Han Sheep significantly.There were more oestrus proportion of inter-mating breed offspring in first half year than second half year.Results indicated that early gain weight and mutton shape of inter-mating breed offspring were both better than Small Tail Han Sheep.Litter size of inter-mating breed offspring was 1.76,which improved than Dorper but oestrus seasonal.

Key words: Mutton sheep , Inter-mating breed offspring, Production performance, Daily gain

中图分类号: 

• S813