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Effects of supplements differing in fatty acid profile to late gestational beef cows on cow performance,calf growth performance,and mRNA expression of genes associated with myogenesis and adipogenesis

引用

Journal of Animal Science and Biotechnology 2021年第4期12卷 1483-1497页

作者： Taoqi Shao Frank A.Ireland Joshua C.McCann Daniel W.Shike Department of Animal Sciences University of Illinois at Urbana-ChampaignUrbanaILUSA

Background:Maternal nutrition during gestation affects fetal development,which has long-term programming effects on offspring postnatal growth *** a critical role in protein and lipid metabolism,essential fatty acids can influence the development of muscle and adipose *** experiment investigated the effects of late gestation supplements(77 d prepartum),either rich in saturated and monounsaturated fatty acids(CON;155 g/cow/d EnerGII)or polyunsaturated fatty acids(PUFA;80 g/cow/d Strata and 80 g/cow/d Prequel),on cow performance and subsequent calf growth performance as well as mRNA expression in longissimus muscle(LM)and subcutaneous adipose tissue at birth and ***:There was no difference(P≥0.34)in cow body weight(BW)or body condition score from presupplementation through *** concentrations of C18:3n-3 and C20:4n-6 decreased(P≤0.05)to a greater extent from mid-supplementation to calving for PUFA compared with CON *** plasma C20:0,C20:5n-3,and C22:6n-3 were increased(P≤0.01)in PUFA during supplementation *** birth,PUFA steers had greater(P=0.01)plasma C20:*** differences(P≥0.33)were detected in steer birth BW or dam milk production,however,CON steers tended(P=0.06)to have greater pre-weaning average daily gain and had greater(P=0.05)weaning BW compared with *** mRNA expression in steers:MYH7 and C/EBPβin LM increased(P≤0.04)to a greater extent from birth to weaning for PUFA compared with CON;MYF5 in LM and C/EBPβin adipose tissue tended(P≤0.08)to decrease more from birth to weaning for CON compared with PUFA;SCD in PUFA adipose tissue tended(P=0.08)to decrease to a greater extent from birth to weaning than *** addition,maternal PUFA supplementation tended(P=0.08)to decrease MYOG mRNA expression in LM and decreased(P=0.02)ZFP423 in adipose tissue during the pre-weaning ***:late gestation PUFA supplementation decreased pre-weaning growth performance of the subsequent steer progeny compared

关键词： Beef cattle Fatty acids Fetal programming late gestation mRNA expression

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