Comparison of Carcass Performance and Meat Quality of Jingxing-Yellow 103 and Beijing-You Chickens

Jingxing-Yellow 103 is the unique commercial breed (synthetic line) that contains Beijing-You consanguinity by far.In this study,carcass performance,meat qualities and main nutrient content of breast muscle were compared between the synthetic line and pure line.A total of 120 Jingxing-Yellow 103 and 120 Beijing-You pure lines (half male and half female) were incubated and hatched contemporarily,and housed under the same management with the same feed.Each 20 birds with average body weight of the synthetic line and pure line were selected and slaughtered at 90 and 120 days of age,respectively,for the measurement of related traits.As the results showed,Jingxing-Yellow 103 grew faster than Beijing-You pure line.The average body weight of Jingxing-Yellow 103 was 1.48 and 1.88 kg at 90 and 120 days of age,respectively,which was 24.4% and 24.5% higher than those of pure line (P<0.05).The breast muscle and thigh muscle mass was 24.5% and 19.2% increased than the pure line at 90 days of age,and 30.7% and 28.9% at 120 days of age.The breast muscle and thigh muscle yield did not shown significant difference between breeds (P>0.05).The intramuscular fat content and crude protein content of breast muscle in Jingxing-Yellow 103 were higher than those of Beijing-You pure line (P<0.05).The main fatty acid in the breast muscle included saturated fatty acid like stearic acid and palmitic acid,and unsaturated fatty acid like arachidonic acid,linoleic acid and oleic acid.The fatty acid composition was not different between breeds (P>0.05).In all,Jingxing-Yellow 103 showed faster growth and reached the market weight of typical medium type of Yellow-feathered broilers by 90 days,and they had higher muscle mass and basically retained favourable meat quality like high intramuscular fat content as compared to Beijing-You pure line.