2026-04-18T00:23:38Zhttps://recercat.cat/oai/request

oai:recercat.cat:10459.1/4657942025-09-15T18:47:02Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Suárez Mesa, Rafael Antonio author Ros Freixedes, Roger author Pena i Subirà, Ramona Natacha author Reixach, Josep author Estany Illa, Joan author 2024-05-09 The recessive T allele of the missense polymorphism rs709596309 C > T of the leptin receptor gene is associated with intramuscular fat. However, its overall impact on pork production is still partial. In this work, we investigated the all-round effects of the TT genotype on lean growth efficiency and carcass, meat and fat quality using data from an experiment that compared the performance of 48 TT and 48 C- (24 CT and 24 CC) Duroc barrows. The TT pigs were less efficient for lean growth than the C- pigs. Although heavier, their carcasses had less lean content, were shorter and had lighter loins. Apart from increasing marbling and saturated fatty acid content, changes caused by the TT genotype in meat and fat quality are likely not enough to be perceived by consumers. The effect on visual marbling score exceeded that on intramuscular fat content, which suggests a direct influence of the T allele on the pattern of fat distribution in muscle. With current low-protein diets, the T allele is expected to be cost-effective only in niche markets where a very high level of marbling is critical. This research is part of the Grant PID2021-125689OB-I00, funded by MCIN/AEI/https://doi.org/10.13039/501100011033 and by “ERDF A way of making Europe”, by the “European Union. Feed intake Growth Intramuscular fat Leptin Meat quality Impact of the leptin receptor gene on pig performance and quality traits