Study On Meat Performance Of Different Crossbred Sheep

In order to compare the hybridization effects of different breeds of meat sheep and smalltailed Han sheep,this study constructed the F1 generation of Dorper sheep and the small-tailed Han sheep hybrid F1 generation(DHF1),the Australian white sheep and the small-tailed Han sheep hybrid F1 generation(AHF1)and the small-tailed Han sheep experimental group,which were slaughtered after breeding under the same conditions,and the slaughter traits,meat quality,nutrients and flavor substance composition of each group were measured.The differences in slaughter traits,meat quality traits,nutrient composition and flavor substance composition between different groups were compared,and the dominant hybrid combinations were screened in order to provide a theoretical basis for the hybridization improvement of the small-tailed han sheep in northeast China.The findings are as follows:1.The slaughtering performance analysis between Dorper sheep and small-tailed Han sheep hybridization 1 generation,Australian white sheep and small-tailed Han sheep hybridization 1generation and small-tailed Han sheep showed that the pre-slaughter live weight,carcass weight,net meat weight,slaughter rate and net meat rate indicators of the two hybrid combinations were significantly better than those of small-tailed Han sheep(P<0.05),of which the slaughtering performance of the DHF1 group was better than that of the AHF1 group.2.The analysis of the meat traits between Dorper sheep and the small-tailed Han sheep hybridization 1 generation,the Australian Aries and the small-tailed Han sheep hybridization 1generation and the small-tailed Han sheep showed that the intramuscular fat content of the AHF1 was significantly higher than that of the small-tailed Han sheep(P<0.01),the 24 h meat color a*value was significantly higher than that of the small-tailed han sheep(P<0.05),the p H24 h and the pressure loss rate were significantly lower than that of the small-tailed cold sheep(P<0.01),and the 24 h meat color L* value was significantly lower than that of the small-tailed cold sheep(P<0.05).The 24 h flesh color a* value and intramuscular fat content of the DHF1 were significantly higher than those of the Small-tailed Han sheep(P<0.01),the 24 h meat color b* value and cooked meat rate were significantly higher than those of the Small-tailed Han sheep(P<0.05),and the p H24 h and pressurized water loss rate were significantly lower than those of the Small-tailed Han sheep group(P<0.05).Overall,the fleshy traits of the two hybrid combinations are better than those of the small-tailed Han sheep,and the DHF1 group is better.3.The analysis of muscle nutrient composition between Dorper sheep and small-tailed Han sheep,1 generation of Australian Aries and Small-tailed Han sheep and the analysis of muscle nutrient composition between Small-tailed Han sheep showed that in amino acids,the content of aspartic acid,valine and leucine in the small-tailed Han sheep group was significantly higher than that of the two hybrid groups(P<0.05),the content of alanine,isoleucine and lysine was significantly higher than that of the two hybrid groups(P<0.01),and the leucine content was significantly higher than that of the AHF1(P<0.01).In the amino acid content of meat sheep,the small-tailed han sheep population is better.Among the fatty acids,the fatty acid content of the DHF1 group was significantly higher than that of the stevodecanic acid and heptadecanenoic acid group(P<0.01),and the myristic acid and palmitic acid content of the 1st generation of the AHF1 group were significantly higher than that of the small tailed han sheep group(P<0.01),and the palm oleic acid content was significantly higher than that of the small tail han sheep group(P<0.05).In the fatty acid content of meat sheep,the hybrid group data were better,and the AHF1 performed better.4.The analysis of flavor substances between Dorper sheep and small-tailed han sheep for 1generation,Australian aries and small-tailed han sheep for 1 generation,and small-tailed han sheep show that the content of volatile flavor substances varies among groups.Among the aldehyde substances,the small tail cold sheep population did not detect octanal and decylaldehyde,and the DHF1 generation group did not detect 2-octenal;in the alcohol substances,the DHF1 group did not detect 2,3-butanediol;in the ester substances,the small tail cold sheep group did not detect ethyl palmitate;in the ketonic substances,the DHF1 group did not detect 2,3-octanedione;in the alkane substances,the small tail cold sheep population did not detect nonane,and the AHF1 group did not detect cetane.And because the species of sheep contained in individuals are quite different,the difference comparison is no longer made.