Research on correlation between body size and slaughter performance,meat quality and immune function of Kazakh sheep and Sakha F1

LI Wen; LU Yabin; JIANG Haichun; LUO Shengjin

doi:10.13557/j.cnki.issn1002-2813.2025.09.015

Abstract：The purpose of this experiment was to study the correlation between body size index and slaughter performance,meat quality and immune function of Kazakh sheep and Sakha F1.In the experiment,twelve 8-month-old Sakha F1(Suffolk sheep ♂ × Kazakh sheep ♀)and Kazakh sheep were selected,and they were divided into two groups according to breeds,with 12 replicates in each group and one sheep in each replicate.It is raised in the method of'grazing and supplemental feeding',and is raised in mixed groups until 9 months of age.The results showed that the correlation coefficients between live weight and carcass weight of Sakha F1 and Kazakh sheep were 0.93 and 0.94,respectively,showing a extremely positive correlation(P＜0.01),and the correlation coefficient between live weight and chest circumference of Sakha F1 was 0.45,showing a positive correlation(P＞0.05).Compared with Kazakh sheep,the chest circumference of Sakha F1 was significant increased(P＜0.05),and the fat buttock weight was significant decreased by 1.45 kg(P＜0.05).Compared with Kazakh sheep,the content of serine in Sakha F1 muscle was significantly increased(P＜0.05),the content of histidine was extremely decreased(P＜0.01),the content of alanine and arginine were significantly decreased(P＜0.05).The fatty acid content in the muscle of Kazakh sheep and Sakha F1 is basically the same.The potassium content in Sakha F1 muscle was higher than that of Kazakh sheep,but the contents of iron,magnesium,calcium,zinc and selenium were lower than those of Kazakh sheep(P＞0.05).Compared with Sakha F1,the concentrations of interleukin-17(IL-17)and interleukin-1β(IL-1β)in the serum of Kazakh sheep were extremely increased(P＜0.01),and the content of interleukin-10(IL-10)was significantly decreased(P＜0.01).The results showed that compared with Kazakh sheep,Sakha F1 had a fast growth rate,less tail fat,and obvious advantages in production performance.Mutton is rich in amino acids,fatty acids and minerals.