PSVI-17 孕期母体营养对第二顺位 F2 后代生长和器官重量的影响

IF 2.7 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Cheyenne S Summers, Amanda S Reiter, Nicole M Tillquist, Nicholas M Barnello, Santhi Priya Voggu, Rachel E Carter, Mia Y Kawaida, Kristen E Govoni, Steven A Zinn, Sarah A Reed
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引用次数: 0

摘要

母本膳食会影响后代的生长,但祖母膳食对后代的影响却鲜有研究。我们假设祖代饮食会影响第二代F2的生长。本研究的目的是确定祖代饮食对第二胎F2后代生长、形态测量和器官重量的影响。为了确定 F0 母羊母性营养不良对 F1 母羊第二胎后代的影响,从妊娠期第 30 天开始到分娩,多胎多塞特母羊(F0,n = 46)分别饲喂 NRC 需求量的 100%(对照组)、60%(限制组)或 140%(超标组)。F1 母羊(n = 37)在 16 至 19 月龄时与两只相关的多塞特公羊中的一只配种,以产生第一奇数的 F2 代。在接下来的繁殖季节,F1 母羊(n = 30)与相同的公羊配种,产生第二奇数的 F2 代后代(n = 58;F2-2),根据 F0 祖代母羊的日粮,这些后代被鉴定为 CON F2-2(n = 6 只母羊,12 只公羊)、RES F2-2(n = 6 只母羊,12 只公羊)或 OVER F2-2(n = 9 只母羊,13 只公羊)。F2-2后代的体重(BW)从出生(0日龄)到28日龄每周记录一次,126日龄前每14日记录一次,266日龄前每28日记录一次。髋高(HH)、冠臀长(CRL)、心周长(HG)和体况评分(BCS)分别在0日龄和120日龄测量。公羊在第 284 ± 0.23 天时被处死。数据用 R Studio 进行分析,P ≤ 0.05 为显著,0.05 < P ≤ 0.10 为趋向。祖代日粮和子代性别被纳入模型,动物 ID 在适当情况下作为随机效应。在第210天和第238天,CON F2-2往往比OVER F2-2体重分别轻6.8%和6.3%(P = 0.07),但在第210天(P = 0.55)或第238天(P = 0.15)与RES F2-2没有差异。我们没有发现祖代日粮对出生时的HH(P = 0.28)、CRL(P = 0.31)或HG(P = 0.62)有影响。120 d时,母羊的CRL比公羊短3.1%(P = 0.07),体重比公羊轻9.4%(P = 0.003)。解剖前,CON F2-2 公羊的 BCS 往往比 RES F2-2 公羊低 5.9% (P = 0.07),比 OVER F2-2 公羊低 5.6% (P = 0.10)。尸体解剖时,祖代日粮不影响器官重量。过度饲喂和限制祖代日粮可能会增加第二胎第二代后代的体重和BCS,这提供了母代日粮对后代有多代影响的证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
PSVI-17 Effects of maternal nutrition during gestation on second parity F2 offspring growth and organ weights
Maternal diet influences offspring growth, but the impact of granddam diet on subsequent generations is less explored. We hypothesized that granddam diet would influence second parity F2 offspring growth. The objective of this study was to determine the influence of granddam diet on second parity F2 offspring growth, morphometric measurements, and organ weights. To determine the impact of poor maternal nutrition of F0 dams on second parity offspring of F1 ewes, multiparous Dorset ewes (F0, n = 46) were fed 100% (control), 60% (restricted), or 140% (over) of NRC requirements from d 30 of gestation until parturition. The F1 ewes (n = 37) were bred at 16 to 19 mo of age to one of two related Dorset rams to generate the first parity F2 generation. The following breeding season, F1 ewes (n = 30) were bred to the same rams to generate the second parity F2 generation offspring (n = 58; F2-2), which were identified as CON F2-2 (n = 6 ewes, 12 rams), RES F2-2 (n = 6 ewes, 12 rams), or OVER F2-2 (n = 9 ewes, 13 rams) corresponding to the diets of the F0 granddams. F2-2 offspring body weights (BW) were recorded weekly from birth (d 0) to d 28, every 14 d until d 126, and every 28 d until d 266 of age. Hip height (HH), crown rump length (CRL), heart girth (HG), and body condition score (BCS) were measured at d 0 and d 120 of age. Rams were necropsied at d 284 ± 0.23. Data were analyzed with R Studio with P ≤ 0.05 considered significant and 0.05 < P ≤ 0.10 considered a tendency. Granddam diet and offspring sex were included in the model with animal ID as a random effect where appropriate. On d 210 and d 238, CON F2-2 tended to weigh 6.8% and 6.3% less, respectively, than OVER F2-2 (P = 0.07) but were not different than RES F2-2 at d 210 (P = 0.55) or d 238 (P = 0.15). We did not detect an effect of granddam diet on HH (P = 0.28), CRL (P = 0.31), or HG (P = 0.62) at birth. At d 120, ewes had 3.1% shorter CRL (P = 0.07) and weighed 9.4% less (P = 0.003) than rams. Immediately before necropsy, CON F2-2 rams tended to have 5.9% less BCS compared with RES F2-2 rams (P = 0.07) and 5.6% less BCS than OVER F2-2 rams (P = 0.10). At necropsy, granddam diet did not influence organ weight. Overfed and restricted granddam diet may increase BW and BCS of second parity, second generation offspring, which provides evidence that maternal diet has multigenerational effects on offspring.
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来源期刊
Journal of animal science
Journal of animal science 农林科学-奶制品与动物科学
CiteScore
4.80
自引率
12.10%
发文量
1589
审稿时长
3 months
期刊介绍: The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year. Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.
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