AA肉鸡与岭南黄肉鸡的部分肉品质指标比较

Comparison of Partial Meat Quality Indices of AA and Lingnanhuang Yellow-Feathered Broiler Chicken

选用遗传背景相同的1日龄雄性Arbor Acre(AA)和雄性岭南黄肉雏鸡各120羽,相同日粮饲养60 d后,选取接近平均体质量的AA鸡和岭南黄肉鸡各12只进行屠宰测定,并进行胸肌组织学和胸肌及腿肌的肉质性状比较.结果表明:①岭南黄肉鸡胸肌率显著低于AA鸡,其余屠宰性状两品种之间差异不显著(P>0.05);②岭南黄肉鸡的色度和嫩度均优于AA肉鸡,其中2个品种间胸肌肉色差异和腿肌剪切力差异均达到显著水平(P<0.05);③岭南黄肉鸡的胸肌肌纤维直径小于AA肉鸡,其胸肌肌纤维密度大于AA肉鸡,且两者都呈现出显著差异(P<0.05);④2个品种的肉鸡胸肌肌纤维直径均与其肌纤维密度呈显著负相关(P<0.05);岭南黄鸡胸肌肌纤维直径与剪切力和胸肌pH24 h呈显著正相关(P<0.05).

One hundred and twenty 1-day-old male AA broilers and 120 1-day-old male Lingnanhuang broilers with the same genetic background were selected and fed with the same diets. At 60 days of age, 12 AA broilers and 12 Lingnanhuang broilers at their near average mass were butchered, and their slaughter indices, histology of breast muscle and meat quality of breast and thigh muscle were studied. The results showed： ①The slaughter indices between the two breeds had no significant difference except the percentage of breast muscle. ②The flesh color and shear-force of Lingnanhuang broilers were better than AA broilers, especially the flesh color of breast muscle and the shear-force of thigh had significant difference （ P 〈 0.05 ）. ③Breast muscle fiber in Lingnanhuang broilers had smaller diameter （ P 〈 0.05） and larger density （ P 〈 0.05 ） than that of AA broilers. ④There was significant negative correlation between the diameter and the density of breast muscle fiber （ P 〈 0.05）. Diameter of breast muscle fiber of Lingnanhuang broilers had significant positive correlation with shear-force and pH24 h respectively （P〈0.05）.