Commercial cut and tissue yields in carcasses from crossbred kid goats

[摘要] Carcass composition related to commercial cuts and tissue composition (muscle, bone and fat) from leg, loin and shoulder of kid goats crossbred Anglo-Nubian or Boer were evaluated in 20 kids from two different genetic groups (13 ½ Anglo-Nubian × ½ Undefined Breed - UB and 7 ½ Boer × ½ UB). The animals were slaughtered at 10 months of age and average body weight of 29 kg ± 0.08. After 24 hours of cooling (2ºC), the carcasses were separated in the cuts: leg, loin (fore loin and rear loin), shoulder, breast, rib, neck and flank for the determination of yields related to cold carcass weight. After that, leg, loin (fore loin and rear loin )and shoulder were dissected in muscle, fat and bone tissues to estimate muscle:bone (MBR) and muscle:fat (MFR) ratios. The average yields for the cuts were: 30.8% of leg, 25.1% of loin (17.9% fore loin and 7.0% rear loin), 22.0% of shoulder, 4.8% of breast, 6.9% of neck, 4.8% of rib, and 5.6% of flank. No significant effect of genetic groups on cut yields was detected, except for the rib, that was higher for Anglo-Nubian × UB (5.12%) than for Boer × UB (4.49%). %). In Boer × UB kids, muscle tissue yield (61.05%), MBR (3.91) and MFR (6.85) were higher, while for Anglo-Nubian × UB yield were higher for fat (10.23%) and bone (16.79%) tissues. The carcass from crossbred Boer × UB kids showed higher muscle tissue in the cuts of major commercial value than that from Anglo-Nubian × UB kids.

[学科分类] 兽医学

[关键词] adipose tissue;lean:bone;lean:fat;lean tissue     Introdução A composição de cortes e a composição tecidual são aspectos que influenciam diretamente a qualidade da carcaça