China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (6): 2612-2625.doi: 10.16431/j.cnki.1671-7236.2025.06.015

• Nutritionand Feed • Previous Articles    

Effects of Gender and Slaughter Weight on Carcass and Meat Quality of Guangyi Black Pigs

CAO Lihua1, LI Huali1, REN Huibo1, LUO Baoming2, LIU Yingying1, CUI Qingming1, DENG Yuan1, ZHU Ji1, HU Xionggui1, LUO Jianhui2, ZUO Jianbo1, CHEN Chen1, PENG Yinglin1   

  1. 1. Institute of Animal and Veterinary Science, Hunan Academy of Agricultural Sciences, Changsha 410131, China;
    2. Hunan Fangrun Ecological Agriculture and Animal Husbandry Co., Ltd., Loudi 417600, China
  • Received:2024-09-30 Published:2025-05-27

Abstract: 【Objective】 In order to understand the germplasm characteristics and provide theoretical basis for scientific feeding,meat quality control and rational utilization of Guangyi Black pigs,the effects of gender and different slaughter weight on carcass performance and meat quality in Guangyi Black pigs were investigated in this study.【Method】 The carcass performance,meat quality and nutrient components in 30 Guangyi Black pigs (half male and half female) were measured,and the data were statistically analyzed according to different genders and slaughter weight stages (80-90,91-100 and 101-110 kg).【Result】 The weight of stomach,heart and liver of 80-90 kg Guangyi Black pigs were significantly lower than that of 101-110 kg pigs (P<0.05).The slaughter rate and lean meat rate of Guangyi Black pigs were 74.02% and 56.93%,respectively.Compared with 91-100 and 101-110 kg pigs,80-90 kg pigs had the smallest carcass length (P<0.05).The meat color score (45 min) and intramuscular fat content in Guangyi Black pigs were 3.77 and 4.52%,respectively.Compared with 91-100 and 101-110 kg pigs,the pH24 h (P<0.01) and inosinic acid content (P<0.05) of meat in 80-90 kg pigs were the lowest.The contents of total amino acid (TAA),flavor amino acid (FAA) and essential amino acid (EAA) of meat in Guangyi Black pigs were 20.26%,15.48% and 9.04%,respectively.There was significant difference between 80-90 and 101-110 kg pigs (P<0.05).The contents of calcium,copper,magnesium,sodium and zinc of meat in Guangyi Black pigs were 35.25,0.36,275.47,433.43 and 14.82 mg/kg,respectively,and the potassium content of meat was 0.41%.The sodium content of meat in 80-90 kg pigs was significantly higher than that in 90-100 kg pigs (P<0.05),and the magnesium content was significantly lower than that in 101-110 kg pigs (P<0.05).Meanwhile,the contents of monounsaturated fatty acids (MUFA),polyunsaturated fatty acids (PUFA),total unsaturated fatty acids (UFA) and saturated fatty acids (SFA) of meat in Guangyi Black pigs were 45.25%,9.25%,54.50% and 45.25%,respectively.Gender had no effect on carcass and meat quality traits in Guangyi Black pigs.The average backfat thickness of Guangyi Black pigs was extremely significantly positively correlated with loin-eye area,leg hip ratio and fat percentage (P<0.01),and was extremely significantly negatively correlated with lean meat rate (P<0.01).The marble score in Guangyi Black pigs was extremely significantly positively correlated with intramuscular fat content (P<0.01).【Conclusion】 Guangyi Black pigs had good meat quality,the contents of meat amino acids,fatty acids and minerals were abundant,and the proportion of EAA and FAA,SFA and UFA was ideal.The carcass and meat quality traits in Guangyi Black pigs were related to slaughter weight,but not to gender,and the most suitable slaughter weight was 91-100 kg.

Key words: Guangyi Black pigs; gender; slaughter weight; carcass traits; meat quality traits

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