【摘要】 【目的】探讨利用RAPD分子标记技术预测杂种优势的可能性。【方法】利用RAPD技术测定6个亲本群体间的遗传距离,对亲本群体间遗传距离与10个经济性状的杂种优势率进行相关性分析。【结果】亲本间遗传距离与日增重、料重比、屠宰率和平均背膘厚的杂种优势率呈正相关,与瘦肉率、瘦肥肉比、皮率、眼肌面积的杂种优势率呈负相关。并且遗传距离与料重比和眼肌面积杂种优势率的相关系数达到显著程度(P<0.05),而与肥肉率、内脂率等性状杂种优势率的相关系数则非常小。【结论】亲本间的遗传距离与杂种优势的相关程度随不同性状而异。更多还原

【Abstract】 【Objective】The study forecasted the possibility of heterosis by the molecular marker of RAPD.【Method】The genetic distances of 6 parental lines of pigs was detected with RAPD,and scientists calculated the association between heterosis percentages of 10 economic traits and genetic distances among populations of parental lines.【Result】Results showed that genetic distances were positively correlated with the heterosis percentages of the average daily gain,ratio of feed to lean meat,dressing percentage and average back-fat thickness.It negatively correlated with that of the lean percentage,ratio of lean meat to fat,lion eye area and skin percentage.Moreover,the correlation between genetic distance and the ratio of feed to meat,and between genetic distance and the lion eye area were significant(P<0.05).【Conclusion】The correlation between genetic distance and heterosis percentage varied with different traits.更多还原