Evaluation of crossbreeding effect of different hybrid combinations of Dashishan district cattle
The purpose of this experiment was to explore the effect of cross between Dashishan district cattle and different foreign excellent beef cattle breeds,so as to improve the production performance and beef quality of Dashishan district cattle.Limousin,Charolais,and Angus frozen semen were used to improve Dashishan district cow,and the reproductive performance of cows,fattening performance of calves and beef quality were measured.The results showed that the conception rate,calving rate,calving number,and calf survival number in Limousin group were significantly higher than those in Angus group and Charolais group(P＜0.05),while the abortion rate was significantly lower than that in other hybrid groups(P＜0.05).The birth weight,body weight at the end of each stage,weight gain at each stage,average daily gain from six months of age to slaughter,average daily gain at the whole stage,total feed intake,and average daily feed intake of F1 generation of the three hybrid groups were extremely higher than those of Dashishan group(P＜0.01).The slaughter weight of Limousin group at 24 months was significantly higher than that of other hybrid groups(P＜0.05).The live weight,carcass weight,and net meat weight before slaughter of the three hybrid groups were extremely higher than those of Dashishan group(P＜0.01),among which Limousin group was the highest.The slaughter rate and net meat rate of Limousin group were significantly higher than those of Angus group and Dashishan group(P＜0.05),and the carcass meat yield was slightly higher than that of other experimental groups(P＞0.05).Crude fat content and marbling in Angus group were significantly higher than those in other groups(P＜0.05).Sixteen amino acids and fifteen fatty acids were detected in each group.In the non-essential amino acids(NEAA),the contents of aspartate and serine in Dashishan group were significantly lower than those in other groups(P＜0.05).There was no significant difference in the contentrations of essential amino acids(EAA),various fatty acids,saturated fatty acids(SFA),monounsaturated fatty acids(MUFA),and polyunsaturated fatty acids(PUFA)in each group(P＞0.05).The study indicates that Limousin group is superior to the other two hybrid combinations in reproductive performance,growth and finishing performance,and slaughtering performance,and Angus group is better in beef quality.
Limousin cattleCharolais cattleAngus cattlehybrid improvementDashishan district cattleproduction performance
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