杂交方式对肉牛产肉性能的影响

Effects of Crossing System on Beef Performance of Crossbred Progeny

从 1 98 5起 ,系统性的选择了国外 8个优良肉牛品种西门塔尔、利木赞、夏洛莱、皮埃蒙特牛等的冻精 ,采用级进和多元杂交的方式 ,产生了 1 4个不同的肉牛杂交组合 ,用统一的方案进行了肥育、屠宰试验 ,研究了不同杂交方式对产肉性能的影响 。

Since 1985, frozen semen of eight abroad beef breeds , including Simmental, Limousin, Charolais, Piedmont were introduced and produced fourteen crossbreeding systems. Crossbreeding cattle were finished and slaughtered under a same standard to compare the effects of different crossing system on beef performance of their crossbred progeny. Results suggested that birth weights and average daily gains of crossing calves were all higher than that of native breed calves. Beef performance of Crossbred F\-1, F\-2 and F3 were gradually increased, carcass weight per cattle of F\-2 and F\-3 were significantly improved and reached global average level(205 kg).\;