Effect of halothane genotype, breed, feed withdrawal, and lairage on pork quality of belgian slaughter pigs.

Abstract

Appreciation is expressed to Guido Geeroms and Daniel D'Haese, who supplied the pigs; and to Annie Lejeune, Frederik Colin, Sabine Buyle and the staff of the abattoir Lokerse Vleesveiling cvba and the cutting plant Van Ruyteghem for their technical support.

Comparison of PRKAG3 and RYR1 gene effect on carcass traits and meat quality in Slovenian commercial pigs

“…Insignificantly, however in agreement with lower backfat thickness, N/n pigs had less intramuscular fat than N/N pigs. Regarding the intramuscular fat content, our results agree with those of De Smet et al (1996) reporting slightly inferior values for N/n compared to N/N pigs, while Monin et al (1999) reported significantly higher intramuscular fat content for N/N than N/n pigs. No difference in ultimate pH between N/N and N/n pigs is in agreement with many studies (Casteels et al, 1995;De Smet et al, 1996;Larzul et al, 1997;Monin et al, 1999;Fisher et al, 2000;Fernandez et al, 2002;de Oliveira Band et al, 2005;Otto et al, 2007).…”

“…Regarding the intramuscular fat content, our results agree with those of De Smet et al (1996) reporting slightly inferior values for N/n compared to N/N pigs, while Monin et al (1999) reported significantly higher intramuscular fat content for N/N than N/n pigs. No difference in ultimate pH between N/N and N/n pigs is in agreement with many studies (Casteels et al, 1995;De Smet et al, 1996;Larzul et al, 1997;Monin et al, 1999;Fisher et al, 2000;Fernandez et al, 2002;de Oliveira Band et al, 2005;Otto et al, 2007). The presence of "n" allele influences the rate of pH fall (Gueblez et al, 1995;De Smet et al, 1996;Larzul et al, 1997;Monin et al, 1999;Fisher et al, 2000;Krenková et al, 2001) but is not related to the ultimate pH, in accordance with similar glycolytic potential observed for N/n and N/N pigs (Larzul et al, 1997).…”

“…Similarly to our results, Leach et al (1996) found no significant difference in backfat thickness between N/n and N/N pigs, but they demonstrated certain superiority of N/n pigs in carcass yields. Fisher et al (2000) found larger LD muscle thickness and/or area in N/n compared to N/N pigs, while other studies reported no significant differences in LD muscle between these two genotypes (De Smet et al, 1996;Leach et al, 1996;Hamilton et al, 2000). Like in the present study, Fisher et al (2000) also observed heavier and leaner hams in N/n pigs; however in their case the differences were not significant.…”

“…Lately, RYR1 gene has also been referred to as CRC (calcium release channel) gene. The recessive "n" allele at RYR1 gene influences the rate of pH fall by favouring the calcium release in muscle cells (Gueblez et al, 1995;De Smet et al, 1996;Larzul et al, 1997;Monin et al, 1999;Fisher et al, 2000). On the other hand, dominant allele RN -induces high glycogen levels in αW muscle fibres (Marinova et al, 1992;Čandek-Potokar et al, 1999) and consequently low ultimate pH (Le Roy et al, 1990;Sellier and Monin, 1994;Le Roy et al, 2000).…”

Prediction of carcass lean content by real-time ultrasound in Pietrain and negative stress Pietrain

“…Belgian Landrace crosses. Their results are in contrast with those of de Smet et al (1996), who observed no difference between CC and CT for carcass lean content in the same breed. This may be explained by the fact that lean content was determined solely from fat thickness.…”