Comparison of the meat quality and fatty acid profile of muscles in finishing Xiangcun Black pigs fed varied dietary energy levels

作     者：Can Yang Wenlong Wang Xiaowu Tang Ruilin Huang Fengna Li Wenxuan Su Yulong Yin Chaoyue Wen Jian Liu Can Yang;Wenlong Wang;Xiaowu Tang;Ruilin Huang;Fengna Li;Wenxuan Su;Yulong Yin;Chaoyue Wen;Jian Liu

作者机构：College of Life Sciences and EnvironmentHunan Provincial Key Laboratory of Biological Resources Protection and Utilization in Nanyue Mountain AreaHengyang Normal UniversityHengyangHunan 421008China Key Laboratory of Agro-ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of ScienceChangsh1Hunan 410125China Hunan International Joint Laboratory of Animal Intestinal Ecology and HealthHunan Normal UniversityChangshaHunan 410081China College of BioengineeringHunan Vocational Technical College of Environment and BiologyHengyangHunan 421005China Key Laboratory of Animal Feed and Nutrition of Zhejiang ProvinceCollege of Animal SciencesZhejiang UniversityHangzhou 310058China Xiangcun High-technology Agricultural Co.LTDLoudiHunan 417000China 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2022年第11卷第4期

页      面：15-24页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 

基　　金：supported by Natural Science Foundation of Hunan Province(No.2021JJ30061) Research foundation of the Education of Hunan Province(18B374) Major Project of Science and Technology Foundation of Hunan Province(No.2015NK1002) 

主　　题：Energy Growth performance Fatty acid Myofibrillar morphology Muscle 

摘      要：To study the effects of dietary energy level on the meat quality of different muscles in finishing pigs,400Xiangcun Black pigs(BW=79.55±4.77 kg)were randomly assigned to 5 treatments with varied calculated digestive energy(DE)at 3,050,3,100,3,150,3,200 and 3,250 kcal/kg,*** treatment had 8replicates with 10 pigs per *** quality,amino acid and fatty acid composition were tested in this *** differences in average daily gain,average daily feed intake or feed-to-gain ratio(P0.05)were observed among dietary *** concentrations of longissimus dorsi(LD)muscle in DE3150was higher than those in other groups(P0.05).The crude fat concentration of biceps femoris(BF)muscle in DE3250 tended to be higher than that in DE3150 and DE3100 groups(P0.05).Pigs in DE3250 and DE3200 had higher fiber density and smaller cross-sectional area of BF muscle than those in DE3150(P0.05).Pigs in DE3150 had the highest Cu concentration in LD muscle compared with those in DE3200,DE3250(P0.05).The C16:1 proportion of LD muscle was lower(P0.01)and C20:1 was higher(P0.05)in DE3050 than that in the other dietary *** C18:3n6 and C20:3n6 proportions of BF muscle in DE3150 were higher than those in DE 3050,DE3200 and DE3250(P0.05).For LD muscle,m RNA expressions of type I and IIa MyHC in group DE3150 were higher than other treatments(P0.01).The LD muscle in DE3150 expressed higher PPARd than in other groups(P0.01).Pigs in DE3100 expressed higher FOX1 than in DE3200 and DE3250(P0.05).Sterol-regulatory element binding proteins(SREBPa)mRNA expression decreased linearly when dietary energy level increased in BF muscle(P0.01).In conclusion,a200 kcal/kg decrease in digestible energy for 4 consecutive weeks did not affect growth performance of Xiangcun Black ***,LD and BF muscle respond differently to dietary energy level,and meat quality was improved by the medium energy level during the finishing phase.