Gubbels Erin R, Block Janna J, Salverson Robin R, Harty Adele A, Rusche Warren C, Wright Cody L, Cammack Kristi M, Smith Zachary K, Grubbs J Kyle, Underwood Keith R, Legako Jerrad F, Olson Kenneth C, Blair Amanda D
Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA.
Hettinger Research Extension Center, North Dakota State University, Hettinger, ND 58639, USA.
Foods. 2021 Aug 31;10(9):2056. doi: 10.3390/foods10092056.
The objective of this research was to investigate the influence of maternal prepartum dietary carbohydrate source on growth performance, carcass characteristics, and meat quality of offspring. Angus-based cows were assigned to either a concentrate-based diet or forage-based diet during mid- and late-gestation. A subset of calves was selected for evaluation of progeny performance. Dry matter intake (DMI), body weight (BW), average daily gain (ADG), gain to feed (G:F), and ultrasound measurements (muscle depth, back fat thickness, and intramuscular fat) were assessed during the feeding period. Carcass measurements were recorded, and striploins were collected for Warner-Bratzler shear force (WBSF), trained sensory panel, crude fat determination and fatty acid profile. Maternal dietary treatment did not influence ( > 0.05) offspring BW, DMI, ultrasound measurements, percent moisture, crude fat, WBSF, or consumer sensory responses. The forage treatment tended to have decreased ( = 0.06) 12th rib backfat compared to the concentrate treatment and tended to have lower ( = 0.08) yield grades. The concentrate treatment had increased ( < 0.05) * and * values compared to the forage treatment. These data suggest variation in maternal diets applied in this study during mid- and late-gestation has limited influence on progeny performance.
本研究的目的是调查母体产前饮食碳水化合物来源对后代生长性能、胴体特征和肉质的影响。在妊娠中期和晚期，将安格斯牛分为精料型日粮组或粗饲料型日粮组。选择一部分犊牛来评估后代性能。在饲养期评估干物质采食量（DMI）、体重（BW）、平均日增重（ADG）、料重比（G:F）以及超声测量指标（肌肉深度、背膘厚度和肌内脂肪）。记录胴体测量数据，并采集腰大肌用于测定沃纳-布拉茨勒剪切力（WBSF）、训练有素的感官评定小组评估、粗脂肪测定和脂肪酸谱分析。母体饮食处理对后代的BW、DMI、超声测量指标、水分百分比、粗脂肪、WBSF或消费者感官反应均无显著影响（P>0.05）。与精料处理相比，粗饲料处理的第12肋背膘厚度有降低趋势（P = 0.06），产量等级也有降低趋势（P = 0.08）。与粗饲料处理相比，精料处理的和值有所增加（P<0.05）。这些数据表明，本研究中在妊娠中期和晚期应用的母体日粮差异对后代性能的影响有限。
