Prediction and Evaluation of Heterosis of Beef Cattle and Their Application

The genetic structure and genetic variation of eight beef cattle cross parents populations were analyzed by six microsatellite loci, and heterosis of beef cattle was predicted. On the basis of microsatellite analysis, the effect of 18 cross combinations was estimated by the method of individual animal model BLUP. A new method of molecular quantitative genetics that select best of all cross combination was submitted. The results showed that the combinations with Hereford Limousin and Charolais as paternal parent are better than others in Fengning and Longhua regions; the combinations with Limousin Angus and Hereford as patemal parent are better than others in Zanhuang regions, the combinations with Hereford Limousin and Piemontese as paternal parent are better than others in Funing regions. Effect of three breeds cross is better than two breeds.