Comparative Study Of Meat Quality Of Muscle Tissue On Huai Pig And Duroc

This article arranged four experiments,to analyze the differences between local varieties in China pig-huai pig and foreign duroc pig,including muscle composition and meat quality traits,histological characteristics,myosin heavy chain(MyHc)expression differences,discusses on HangHuai pig meat quality improvement of the role of,for the further study of HangHuai on pig and provide theoretical basis for the development and utilization of the future for its fleshy.Test results are showed as follows:1.Respectively measure the Huai pig,Duroc's longissimus dorsi's crude protein,crude ash,calcium,phosphorus,reducing sugar ment,and found that duroc(7 months)and Huai pig(12 months)'s muscle protein significant have differences(P<0.05).So it is concluded that the contents of crude protein in duroc is more than huai pig.2.Huai pig and Duroc's longissimus dorsi's amino acids were measured,found Glutamate(Glu)on the content,huai pig(12 months)porcine muscle and Duroc(7 months)muscle significant difference(P<0.05),cystine(Cys)content,Duroc(7 months)and huai pigs(12 months)differ significantly(P<0.05);Duroc tyrosine(Tyr)content,7 months and 12 months of huai pig significant difference(P<0.05);On the content of lysine(Lys),huai pig(12 months),Duroc(7 months)and huai pig(7 months)were significant difference(P<0.05);On the content of proline(Pro),Duroc(7 months)and huai pig(12 months)significant difference(P<0.05),no significant difference for the rest of the amino acids.Therefore,huai pig back the longest glutamic acid,lysine content is higher in muscle,huai pig's muscle taste better than Duroc,and has higher nutritional value.Drip loss of huai pig,duroc,back muscle drip loss rate,the longest Duroc(7 months)and huai pig(7 months,12 months)extremely significant difference(P<0.01);Back muscle shear force on the longest,huai pig(7 months)with duroc(7 months)extremely significant difference(P<0.01).Hydraulic is higher,so that huai pig meat quality is better,and the degree of muscle tender young pigs than high into the swine,huai pig muscle tenderness,is better than that of duroc trend.3.Muscle histology characteristics of huai pig,duroc were determined,found that huai pig(12 months)back longest muscle fiber diameter and transverse area were significantly lower than duroc(7 months)and huai pigs(7 months)(P<0.01);huai pig(7 months)on the number of fibers per unit area was significantly higher than duroc(7 months)and huai pigs(12 months)(P<0.01);huai pig(12 months)psoas major cross-cutting area and fiber diameter were significantly lower than 7 months duroc(P<0.01),significantly lower than 7 months of huaihe pigs(P<0.05);12 months huai pig muscle fiber number per unit area significantly less than 7 months of huaihe pigs(P<0.01).Therefore,huai pig in the area of muscle fiber,diameter of muscle fiber is lower than duroc,on the density higher than that of duroc,huai pig meat tenderness than duroc.4.the difference MyHC gene expression was measured,results showed Duroc on relative expression level higher than locust pigs,adult Huai pigs is also higher than young pigs in the expression level.