肉牛杂交优势预测、评估及其应用研究

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利用微卫星标记技术分析了8个肉牛杂交亲本群体的遗传结构和遗传变异,预测了杂种优势。在此基础上,对18个肉牛杂交组合的实际杂交效果利用个体动物模型进行了评估,并提出了筛选最优杂交组合的分子数量遗传学综合评选新方法。其最优杂交组合的评选结果为:在丰宁、隆化代表区域,以海伏特、利木赞和夏洛来为父本的组合最好;在赞皇代表区域,以利木赞、安格斯和海伏特为父本的组合最好;在抚宁代表区域,以海伏持、利木赞和皮埃蒙特为父本的组合最好。另外,三元杂交效果优于二元杂交。
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