Maternal undernutrition and offspring sex determine birth-weight, postnatal development and meat characteristics in traditional swine breeds  

作　　者：M.Vázquez-Gómez C.García-Contreras L.Torres-Rovira S.Astiz C.óvilo A.González-Bulnes B.Isabel 

机构地区：[1]Faculty of Veterinary Medicine,UCM,Madrid, Spain [2]INIA,Madrid, Spain

出　　处：《Journal of Animal Science and Biotechnology》2018年第3期674-688,共15页畜牧与生物技术杂志（英文版）

基　　金：supported by funds from the Ministry of Economy and competitiveness(project AGL2013–48121-C3-R and AGL2016–79321-C2–2-R);co-funded by FEDER.More funds were obtained from MEDGAN-REDLAB(project S2013/ABI-2913);CAM,co-funded by FEDER.MVG and CGC are backed by the Spanish Government(MVG:FPU National Program Grant Number FPU014/01285.CGC:FPI National Program Grant Number BES-2014-070464)

摘　　要：Background: The aim of this study was to determine how maternal undernutrition during pregnancy and offspring birth-weight can affect the postnatal development of offspring under farm conditions, which may lead to consequences in its meat and carcass quality. The current study involved a total of 80 litters from Iberian sows fed a diet fulfilling daily requirements(n = 47; control) or providing 70% daily requirements(n = 33; underfed) from d 38 to d 90 of gestation when fetal tissue development begins. After birth, piglets born live were classified as low birthweight(LBW; < 1 kg) and normal birth-weight(NBW; ≥1 kg). During the growing phase, 240 control and 230 underfed pigs(50% males and females) distributed by BW category and sex were studied until the slaughter.Results: At birth and weaning, there were significant differences in all morphological measures and weight between NBW and LBW piglets as expected(P < 0.0005), but few effects of the gestational feed restriction. During the growing phase, NBW pigs continued with higher weight than LBW pigs on all the days of evaluation(P < 0.05),even though control-LBW-females and LBW-males showed a catch-up growth. However, underfed pigs showed slower growth and higher feed conversion ratio than control pigs(P < 0.0001) at 215 days old. Moreover, the average daily weight gain(ADWG) for the overall period was greater for NBW, male and control pigs than for their LBW, female and underfed pigs(P < 0.0001, P< 0.0005 and P< 0.05, respectively) and NBW pigs were slaughtered at a younger age than LBW pigs(P < 0.0001). After slaughtering, control pigs also had higher carcass yield and backfat depth than underfed pigs(P < 0.0005) and the maternal nutritional effect caused main changes in the polar lipid fraction of liver and loin. The fatty acid composition of loin in control pigs had higher C18:1 n-9 and n-3 FA concentrations, as well as lower ∑n-6/∑n-3 ratio, than in underfed pigs(P < 0.005).Conclusions: In brief, results showed that the effects of maternal nutritional Background: The aim of this study was to determine how maternal undernutrition during pregnancy and offspring birth-weight can affect the postnatal development of offspring under farm conditions, which may lead to consequences in its meat and carcass quality. The current study involved a total of 80 litters from Iberian sows fed a diet fulfilling daily requirements(n = 47; control) or providing 70% daily requirements(n = 33; underfed) from d 38 to d 90 of gestation when fetal tissue development begins. After birth, piglets born live were classified as low birthweight(LBW; < 1 kg) and normal birth-weight(NBW; ≥1 kg). During the growing phase, 240 control and 230 underfed pigs(50% males and females) distributed by BW category and sex were studied until the slaughter.Results: At birth and weaning, there were significant differences in all morphological measures and weight between NBW and LBW piglets as expected(P < 0.0005), but few effects of the gestational feed restriction. During the growing phase, NBW pigs continued with higher weight than LBW pigs on all the days of evaluation(P < 0.05),even though control-LBW-females and LBW-males showed a catch-up growth. However, underfed pigs showed slower growth and higher feed conversion ratio than control pigs(P < 0.0001) at 215 days old. Moreover, the average daily weight gain(ADWG) for the overall period was greater for NBW, male and control pigs than for their LBW, female and underfed pigs(P < 0.0001, P< 0.0005 and P< 0.05, respectively) and NBW pigs were slaughtered at a younger age than LBW pigs(P < 0.0001). After slaughtering, control pigs also had higher carcass yield and backfat depth than underfed pigs(P < 0.0005) and the maternal nutritional effect caused main changes in the polar lipid fraction of liver and loin. The fatty acid composition of loin in control pigs had higher C18:1 n-9 and n-3 FA concentrations, as well as lower ∑n-6/∑n-3 ratio, than in underfed pigs(P < 0.005).Conclusions: In brief, results showed that the effects of maternal nutritional

关 键 词：CARCASS quality FATTY acids Feed RESTRICTION Growth Iberian pigs Low BIRTH-WEIGHT MALNUTRITION 

分 类 号：S[农业科学]