Santos V A C, Silva A O, Cardoso J V F, Silvestre A J D, Silva S R, Martins C, Azevedo J M T
CECAV - University of Trás-os-Montes and Alto Douro, Animal Science Department, Apartado 1013, 5001-801 Vila Real, Portugal.
Meat Sci. 2007 Apr;75(4):725-36. doi: 10.1016/j.meatsci.2006.10.003. Epub 2006 Nov 22.
Carcass composition and meat quality traits were evaluated in 55 suckling kids (27 males and 28 females) from Serrana (S), Bravia (B) and Serrana×Bravia (S×B) crossbred genotypes. Kids were slaughtered at 8-11kg of live weight according to "Cabrito de Barroso-PGI" specifications and carcasses' left sides were totally dissected. Dressing percentage (based on ELW) did not vary between genotypes and sexes. Genotype B carcasses have better conformation, expressed in higher compactness index and muscle/bone ratio. Sex had no effect on the composition of dissected carcass but females deposited more internal fat than males. S genotype had significantly less muscle content and higher dissectible fat compared to B and S×B genotypes, suggesting differences in maturity stages. The carcass' bone content (20.4-21.4%) did not differ significantly between genotypes. The longissimus thoracis et lumborum (LTL) and gluteobiceps (GB) muscles were used for meat quality determinations. Genotype had a significant effect on meat traits and fatty acid composition of the analysed muscles: B genotype and LTL muscle showed lower final pH, S×B genotype had darker and more red muscles, GB muscle had a higher shear force value and lower collagen solubility. Few sex effects were observed on meat quality traits as well as on fatty acid composition. Average percentage of desirable fatty acids in kids was superior to 60% with male S genotype displaying a lower value. Genotypes B and B×S, males and GB muscle had more favorable PUFA:SFA ratios.
对来自塞拉纳（S）、布拉维亚（B）和塞拉纳×布拉维亚（S×B）杂交基因型的55只哺乳羔羊（27只雄性和28只雌性）的胴体组成和肉质性状进行了评估。根据“巴罗斯山羊PGI”规范，羔羊在活重8 - 11千克时屠宰，胴体左侧进行完全解剖。屠宰率（基于空腹活重）在基因型和性别之间没有差异。基因型B的胴体具有更好的外形，表现为更高的紧实度指数和肌肉/骨骼比。性别对解剖后的胴体组成没有影响，但雌性比雄性沉积更多的内脏脂肪。与B和S×B基因型相比，S基因型的肌肉含量显著较少，可分割脂肪较高，这表明成熟阶段存在差异。基因型之间胴体的骨含量（20.4 - 21.4%）没有显著差异。使用胸腰最长肌（LTL）和臀二头肌（GB）肌肉进行肉质测定。基因型对分析肌肉的肉质性状和脂肪酸组成有显著影响：B基因型和LTL肌肉的最终pH值较低，S×B基因型的肌肉颜色更深且更红，GB肌肉的剪切力值较高且胶原蛋白溶解度较低。在肉质性状以及脂肪酸组成方面观察到的性别效应较少。羔羊中理想脂肪酸的平均百分比超过60%，雄性S基因型的值较低。基因型B和B×S、雄性和GB肌肉的多不饱和脂肪酸:饱和脂肪酸比值更有利。
