The Asp298Asn missense mutation in the porcine melanocortin-4 receptor (MC4R) gene can be used to affect growth and carcass traits without an effect on meat quality
Van den Maagdenberg, Karijn; Stinckens, Anneleen; Claeys, Ericet al.
average daily gain; carcass quality; melanocortin-4 receptor; meat quality; pigs
Abstract :
[en] A promising tool to improve daily gain in pigs is the missense mutation (Asp298Asn) in the melanocortin-4 receptor (MC4R) gene, especially in the Belgian pig industry where the slow-growing Pietrain breed is very frequently used as the sire breed The MC4R is expressed in the appetite-regulating region of the brain where it regulates feed intake and energy balance. The mutation has been associated with differences in fatness, daily gain and feed intake. However, less information on the correlated effects on meat quality is available. In order to evaluate the influence of the MC4R mutation on carcass and meat quality parameters, a total of 1155 pigs of a four-way cross were slaughtered at an average live weight of 109 kg, and data about daily live-weight gain, carcass and meat quality were collected Allelic frequencies were 0.69 for the G-allele (298Asp variant or well-conserved variant) and 0.31 for the A-allele (298Asn variant or the mutated variant). Barrows and gilts were almost equally distributed in this population with, respectively, 49.9% and 50.1%. Moreover, independent of this mutation, the relationship between average daily gain (ADG) and carcass on the one hand and meat quality traits on the other hand was evaluated in this population. A significant positive influence of the MC4R mutation on ADG (P < 0.001) was found accompanied by a higher fat thickness (P < 0.05) and a lower carcass lean meat content (P < 0.01), whereas muscle thickness and carcass conformation traits were not affected. The effects on meat quality traits were not significant, except for a lower shear force (P = 0.054) and a higher intramuscular fat content (P = 0.052) in AA animals. In the longissimus, pH and pork quality meter (PQM) values were not influenced, and effects on drip loss and colour were not apparent. Residual correlation coefficients between ADG and carcass lean meat content on the one hand and meat quality traits on the other hand were generally very low (vertical bar r vertical bar > 0.1). Higher ADG, higher carcass fat thickness and lower carcass lean meat content were correlated with slightly lower shear force values (vertical bar r vertical bar similar to 0.1, P < 0.05). In conclusion, in the studied population, the Asp298Asn mutation in the MC4R gene was associated with improved daily gain, higher carcass fatness and almost no effect on meat quality traits.
Disciplines :
Zoology Agriculture & agronomy Veterinary medicine & animal health
Author, co-author :
Van den Maagdenberg, Karijn; Universiteit Gent - Ugent > Department of Animal Production > Laboratory for Animal Nutrition and Animal Product Quality
Stinckens, Anneleen; Katholieke Universiteit Leuven - KUL > Laboratory of Livestock Physiology, Immunology and Genetics
Claeys, Eric; Universiteit Gent - Ugent > Department of Animal Production > Laboratory for Animal Nutrition and Animal Product Quality
Seynaeve, Marc; Universiteit Gent - Ugent > Department of Animal Production > Laboratory for Animal Nutrition and Animal Product Quality
Clinquart, Antoine ; Université de Liège - ULiège > Département de sciences des denrées alimentaires > Technologie des denrées alimentaires
Georges, Michel ; Université de Liège - ULiège > Département de productions animales > Génomique animale
Buys, Nadine; Katholieke Universiteit Leuven - KUL > Laboratory of Livestock Physiology, Immunology and Genetics,
De Smet, Stefaan; Universiteit Gent - Ugent > Department of Animal Production > Laboratory for Animal Nutrition and Animal Product Quality
Language :
English
Title :
The Asp298Asn missense mutation in the porcine melanocortin-4 receptor (MC4R) gene can be used to affect growth and carcass traits without an effect on meat quality
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