摘要:
利用顺昌县现有和新引进的南江黄羊种群,采用家系内个体指数法,进行世代扩繁选育,结果表明:第3世代后备公、母羊2、4、6月龄体重比第1世代同期体重提高13.16%～16.43%,公羊差异显著,母羊差异极显著;公羊初生至6月龄平均日增重为95.5g,母羊为90.0g,分别比第1世代提高15.45%、15.38%;第3世代公、母羊6月龄胸围、体长和体高比第1世代提高5.88%～10.77%,差异均极显著;第3世代公、母羊6月龄体重、体长、体高和胸围的变异系数(C.V)与第1世代相比均有下降,体型外貌均匀整齐;3个世代的繁殖性能、羔羊初生重和每个世代内各月龄性别间体重差异均不显著。
Abstract:
The generative reproduction and breeding of Nanjiang Yellow goats from Nanjiang County and Shunchang County has been conducted using the method of individual composite index in the family population.The results showed that the weight of the 2,4 and 6-month old male and female goats in the 3rd generation was higher than that the 1st generation of the same age.The rate of weight increase ranged from 13.16% to 16.43%.The average daily weight gain of the bucks and does from birth to 6-month in the 3rd generation was 95.5 g and 90.0 g,respectively.These were higher than those in the 1st generation.The increase rate was 15.45% and 15.38% for the bucks and the does,respectively.The chest girth,body length and withers height of the 6-month old bucks and does in the 3rd generation were 5.88% to 10.77% greater than those in the 1st generation.The coefficients of variations of body weight,chest girth,length and withers height in the 6 month old goats of the 3rd generation were all decreased,as compared to those in the 1st generation.Body size and appearance in the 3rd generation goats were uniform.The reproductive traits,birth weight in the 3 generations showed no significant difference.The body weight difference between the bucks and does at same age in each generation also was not significant.
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