Genotype and sex effects on carcass and meat quality of suckling kids protected by the PGI “Cabrito de Barroso”

Abstract

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 8-11 kg 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.

Effects of feeding systems and breed group on carcass characteristics and meat quality of feedlot goat kids

“…The results presented in this study for muscle yield according to the breed group were similar to those verified by Santos et al (2007) and Ferreira (2010) researching on Serrana, Bravia and Serrana x Bravia and Anglo-Nubian, Boer x Anglo-Nubian and ¾ Boer x mixed breed goats, slaughtered between 8 and 11 kg and 20 and 25 kg of body weight, respectively.…”

“…Bone and other tissues yields were not affected by the feeding system, breed group and by the interaction of these two sources of variation, agreeing with Grande et al (2003), Santos et al (2007) and Menezes (2008), respectively. On the other hand, differ from the results obtained by Emerson (2012), which found an influence of breed group and feeding system on bone yield for goats.…”

“…The average yields of bone and other tissues found in this study were lower than the reported by Grande et al (2003), Santos et al (2007), Menezes (2008) and Ferreira (2010), who observed 161.1; 170.0; 209.5; 151.7 and 227.4 g kg -1 . In addition, Rodrigues (2009) observed 88.0 g kg -1 , this data, allow to conclude that the observed in this study is in agreement with the standards found for animals of this age.…”

Intramuscular fat and fatty acid profile of muscle of lambs finished in irrigated pasture

“…This variability offers opportunities to be explored in production systems of lambs. The influence of genotype on fatty acid composition has also been observed in goats (Santos et al 2007;Pen˜a et al 2011). Emphasise that the fatty acid composition is influenced not only by genetic factors but also by environmental factors such as diet and supplementation.…”

Carcass traits of improved and indigenous lamb breeds of North-Western Turkey under an intensive production system

“…Similarly Fisher et al (2000) reported lower carcass conformation and fatness scores in Welsh Mountain and Soay lambs indicating thinner muscle and less fat cover of these breeds than in the Suffolk. It was reported in several studies that by the improvement in carcass weight, an increase in carcass measurements and conformation indexes would also be expected (Díaz et al, 2002;Santos et al, 2007).…”