关键词: 肌内脂肪, 大理石纹评分, 地方猪, 瘦肉型猪

Abstract: By measuring and manually scoring the intramuscular fat of lean ternary hybrid pigs，Tianlu black pigs，Xiaoerhua pigs，Yuedong Black pigs，and Tibetan pigs，the intramuscular fat of local pig breeds and lean pig breeds was explored. and marbling scores. 80 lean ?meat ternary hybrid pigs，48 Tianlu black pigs，Xiaoerhua pigs， Yuedong black pigs，and Tibetan pigs（8 pigs each）were used as test materials for the determination of carcass bodyweight，eye muscle area and intramuscular fat. Manual scoring was performed using the American NPPC standard colorimetric card，and after taking the average，bioinformatics methods were used to explore its correlation. This experimental study found that the intramuscular fat distribution of lean pigs is more uniform，the fat cells of local pig breeds are evenly distributed among the muscle fibers，the muscle fiber gap of lean pigs is small，and the distribution of fat cells in the muscle is relatively concentrated. The marbling scoring method is suitable for the simple and rapid evaluation of the intramuscular fat content of lean pigs，but it is not suitable for the evaluation criteria of the intramuscular fat content of all local pig breeds.

Key words: Intramuscular fat, Marbling score, Local pigs, Lean pigs