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Effect of feeding high oleic soybean oil to finishing pigs on growth performance, carcass characteristics, and meat quality 饲喂高含油大豆油对育肥猪生长性能、胴体特性和肉品质的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-30 DOI: 10.1093/jas/skae393
Ashir F Atoo, Crystal L Levesque, Robert Thaler, Keith Underwood, Erin Beyer, Jorge Y Perez-Palencia
This study aimed to evaluate the effects of dietary fat source and feeding duration on growth performance, carcass characteristics, and meat quality of finishing pigs. A total of 450 twenty-one-week-old finishing pigs with an average body weight of 113.7 ± 8 kg were housed in 90 pens assigned to one of five dietary treatments in a 2×2 + 1 factorial design. Dietary treatments consisted of two fat sources (CWG: 4% inclusion of choice white grease and HOSO: 4% inclusion of high oleic soybean oil) each provided 2 or 4 weeks before marketing. The “+1” diet was corn-based without fat inclusion (CON). Observations included growth performance, carcass characteristics, fatty acid (FA) profile, and sensory evaluation. Data was analyzed using PROC MIXED in SAS considering dietary treatment as a main effect, feeding duration, and their interactions. Pre-planned contrasts were used to compare dietary treatments with the control. From d14 to 28 and the overall experimental period (d0–28), pigs fed fat-supplemented diets had a greater (P<0.05) average daily gain and gain-to-feed ratio than CON-fed pigs. There was no significant difference (P>0.05) in growth performance when comparing fat sources or feeding periods. Pigs supplemented with either CWG or HOSO showed a tendency to have a greater (P<0.10) belly weight and belly yield and a lesser (P<0.10) loin yield and loin muscle area when compared with CON pigs. The loin from pigs fed fat sources had greater (P<0.05) oleic acid and eicosenoic acid concentration when compared with CON. When CWG was compared with HOSO, pigs fed CWG had a higher (P<0.05) concentration of palmitic acid and stearic acid while the HOSO pigs had a higher concentration of oleic acid and linolenic acid in the loin. In the belly, CON had a higher (P<0.05) concentration of palmitic acid and stearic acid compared to HOSO, while pigs fed fat sources had a higher concentration of oleic acid and eicosenoic acid. Bellies from HOSO had higher (P<0.05) oleic acid and α-linolenic acid methyl ester concentrations, while CWG had higher concentrations of g-linolenic acid. For the sensory evaluation, the palatability and acceptability of pork were not affected (P>0.05) by dietary treatments. In conclusion, supplementation with HOSO not only improved performance but tended to improve some carcass characteristics and increased the concentration of oleic acid and some other unsaturated FA with a concomitant decrease in the concentration of some saturated FA in pork.
本试验旨在评价饲粮脂肪来源和饲喂时间对育肥猪生长性能、胴体特性和肉品质的影响。试验采用2×2 + 1因子设计,将450头平均体重为113.7±8 kg的21周龄育肥猪饲养在90个猪圈中,每组饲喂5种饲粮处理。膳食处理包括两种脂肪来源(CWG:含4%的精选白脂和HOSO:含4%的高油大豆油),每种在上市前2或4周提供。“+1”饮食以玉米为基础,不含脂肪(CON)。观察包括生长性能、胴体特性、脂肪酸分布和感官评价。采用SAS中的PROC mix分析数据,考虑饲粮处理为主要效果、饲养时间及其相互作用。预先计划的对比用于比较饮食治疗与对照组。在第14 ~ 28天及整个试验期内(第10 ~ 28天),饲粮中添加脂肪的猪平均日增重和料重比均高于对照组(P<0.05)。在脂肪来源和饲养周期的比较中,生长性能无显著差异(P>0.05)。与CON猪相比,添加CWG或HOSO的猪有较大(P<0.10)的腹部重和腹部产量,而较小(P<0.10)的腰部产量和腰部肌肉面积。饲喂脂肪源的猪腰肉中油酸和二十烯酸浓度高于对照组(P<0.05)。与HOSO相比,饲喂CWG的猪腰肉中棕榈酸和硬脂酸浓度高于对照组(P<0.05), HOSO猪腰肉中油酸和亚麻酸浓度高于对照组(P<0.05)。胃内棕榈酸和硬脂酸浓度CON高于HOSO (P<0.05),油酸和二十烯酸浓度高于HOSO。HOSO鱼腹的油酸和α-亚麻酸甲酯浓度较高(P<0.05), CWG鱼腹的g-亚麻酸浓度较高。感官评价方面,饲粮处理不影响猪肉的适口性和可接受性(P>0.05)。综上所述,添加HOSO不仅提高了猪的生产性能,而且有改善胴体某些特性的趋势,增加了猪肉中油酸和其他一些不饱和脂肪酸的浓度,同时降低了一些饱和脂肪酸的浓度。
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引用次数: 0
Genetic investigations into the use of sensory evaluation: The case of boar taint discrimination in Pietrain sired crossbreds 感官评价应用的遗传学研究:以公猪杂种杂种的污点鉴别为例
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-24 DOI: 10.1093/jas/skae389
Alice Markey, Christine Groβe-Brinkhaus, Daniel Mörlein, Johanna Mörlein, Hélène Wilmot, Ernst Tholen, Nicolas Gengler
Using genetic selection for raising intact boars, which improves growth and feed efficiency, is a promising alternative to castration for mitigating boar taint. Selective breeding has the potential to help to identify and select for genetic lines with a reduced risk of boar taint. Common phenotypes are laboratory measurements of skatole (SKA) and androstenone (ANON) i.e., the major compounds responsible for boar taint, in backfat. However, an alternative exists: sensory evaluation by human assessors. The objectives of this study were (1) to estimate the genetic relationships among sensory scores (SENS) obtained by different assessors, (2) to correlate these scores with SKA and ANON, (3) to establish the independence of SENS from the causal traits, here SKA and ANON, by recursive modeling, holding those constant, and (4) to combine different assessors to allow an efficient selection against boar taint. Data included up to 1016 records of SKA, ANON and SENS (0 to 5) from 10 trained assessors on the backfat of intact males reared at least until puberty at three performance testing stations testing the products of Pietrain × commercial crossbred sows. Genetic parameters were estimated using restricted estimate maximum likelihood. Traits SKA and ANON were log (base 10) transformed (SKAt and ANONt) and SENS traits were Snell transformed SENS (SENSt). Heritability estimates were 0.52 for SKAt and 0.53 for ANONt, those for SENSt ranged from 0.07 to 0.30. Moderate to high genetic correlations between some SENSt and SKAt (up to 0.87) and ANONt (up to 0.61) were found. Heritabilities and correlations indicated that some SENSt could be used to select against boar taint. Studying the independence of SENSt from SKAt and ANONt based on a posteriori recursive model revealed a large range of reductions of genetic variance: up to 71.08 %. However, some SENSt remained moderately heritable (0.04 to 0.19) indicating independent genetic variance from SKAt and ANONt. This reflects that some heritable compounds potentially not related to SKA or ANON are perceived. Finally, the combination of assessors allowed, here shown with three assessors, to obtain a high heritability of 0.40, associated to high genetic and phenotypic correlations. Moreover, these results demonstrate the potential of using the sensory scores of several trained assessors for selection against boar taint.
利用遗传选择来饲养完整公猪,可以提高生长和饲料效率,是一种有希望的替代阉割来减轻公猪污染的方法。选择性育种有可能帮助识别和选择具有降低公猪污染风险的遗传系。常见的表型是实验室测量粪臭素(SKA)和雄烯酮(ANON),即主要化合物负责猪的污染,在背膘。然而,存在另一种选择:由人类评估员进行感官评估。本研究的目的是:(1)估计不同评估者获得的感官评分(SENS)之间的遗传关系,(2)将这些评分与SKA和ANON相关联,(3)通过递归建模,建立SENS与因果性状的独立性,这里SKA和ANON保持不变,(4)结合不同的评估者,以便有效地选择野猪污染。数据包括1016条SKA、ANON和SENS(0 - 5)记录,这些记录来自10名训练有素的评估人员,他们对至少饲养到青春期的完整雄性背膘进行了评估,这些雄性在三个性能测试站测试了Pietrain ×商品杂交母猪的产品。遗传参数的估计采用限制估计最大似然法。SKA和ANON性状采用log (base 10)转化(SKAt和ANONt), SENS性状采用Snell转化(SENSt)。SKAt的遗传力估计为0.52,ANONt的遗传力估计为0.53,SENSt的遗传力估计范围为0.07至0.30。部分SENSt与SKAt(最高达0.87)和ANONt(最高达0.61)之间存在中等至高度的遗传相关性。遗传力和相关性表明,某些SENSt可用于抗公猪污染的选择。基于后验递归模型研究SENSt与SKAt和ANONt的独立性,发现遗传方差的减少幅度很大:高达71.08%。然而,一些SENSt仍然具有中度遗传性(0.04至0.19),表明独立于SKAt和ANONt的遗传变异。这反映了一些可能与SKA或ANON无关的遗传化合物被感知。最后,评估器的组合允许,这里显示了三个评估器,获得0.40的高遗传率,与高遗传和表型相关性相关。此外,这些结果证明了使用几个受过训练的评估员的感官分数来选择野猪污染的潜力。
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引用次数: 0
Effect of multispecies fungal extract supplementation on growth performance, nutrient digestibility, ruminal fermentation, and the rumen microbiome composition of beef cattle fed forage-based diets 饲粮中添加多种真菌提取物对肉牛生长性能、营养物质消化率、瘤胃发酵及瘤胃微生物组组成的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-24 DOI: 10.1093/jas/skae387
Alejandro M Pittaluga, Florencia E Miccoli, Leandro D Guerrero, Alejandro E Relling
Our objective was to evaluate the effect of a multispecies fungal extract (MFE) on growth performance, apparent total tract digestibility (ATTD), fermentation characteristics, and rumen microbiome composition of beef cattle fed forage-based diets. For experiment 1, ruminally cannulated Angus × SimAngus cows (n = 4; body weight [BW] = 569 ± 21 kg) were used in a randomized crossover design with two 21-d study periods and a 23-d washout period to evaluate the effect of dietary inclusion of a MFE on in situ digestion, ruminal fermentation, and the composition of the rumen microbiome. Treatments consisted of a forage-based diet with or without the inclusion of a MFE. Rumen samples were collected on days 5, 10, and 20. Experiment 2 evaluated different inclusion rates of the MFE in a randomized complete block design using Angus × SimAngus-crossbred steers (n = 80; BW = 370 ± 44 kg). Steers were blocked by BW and randomly assigned to 1 of 4 treatments (2 pens/treatment): diet with no MFE, 0.02%, 0.04%, and 0.08% of the MFE (dry matter (DM) basis). Steers were fed a forage-based diet for 122 d. Subsets of 10 steers/treatment were randomly selected for the determination of ATTD on d 20, 40, and 60. All data were analyzed using the MIXED procedure of SAS. In exp 1, adding the MFE to the diet tended to increase the ruminal disappearance rate of the DM on d 10 (P = 0.06). No interactions or treatment effects were observed for the short-chain fatty acid profile of the rumen fluid (P ≥ 0.13). Metagenomic analysis of the rumen microbiome showed a MFE × d interaction for the Fibrobacter genus (P = 0.01), which on d 20 was less abundant in the rumen of cows fed the MFE. In exp 2, steers supplemented with 0.04% of MFE had a lower average daily gain and were lighter at the end of the experiment (cubic, P ≤ 0.04) compared to steers supplemented with 0.02% MFE. Steers fed the diet with 0.02% of MFE had the greatest gain to feed ratio among the MFE-supplemented groups (cubic, P &lt; 0.01). Dietary inclusion of the MFE increased neutral detergent fiber digestibility (linear, P = 0.05). Steers supplemented with 0.04% of MFE had the greatest acid detergent fiber digestibility among treatments (quadratic, P = 0.03). Collectively, results showed that ruminal disappearance rate and digestibility of forage-based diets increased due to MFE supplementation, but did not translate into growth performance improvements or beneficially alter rumen fermentation.
本研究旨在评价多菌种真菌提取物(MFE)对饲喂草料型日粮肉牛生长性能、表观全道消化率(ATTD)、发酵特性和瘤胃微生物组组成的影响。试验1:瘤胃插管的安格斯×西芒格斯奶牛(n = 4;试验采用随机交叉设计,分为2个21 d研究期和23 d洗脱期,评估饲粮中添加MFE对瘤胃原位消化、瘤胃发酵和瘤胃微生物组组成的影响。治疗包括以饲料为基础的饮食,包括或不包括MFE。于第5、10、20天采集瘤胃标本。实验2采用随机完全区组设计,使用Angus × simangus杂交阉牛(n = 80;体重= 370±44公斤)。以体重为障碍,随机分配到4个处理(2栏/处理)中的1个处理:不添加MFE、0.02%、0.04%和0.08%的MFE(干物质(DM)基础)。饲喂以饲料为基础的饲粮122 d。在第20、40和60天,每组随机选择10头牛进行ATTD测定。所有数据采用SAS的MIXED程序进行分析。在试验1中,饲粮中添加MFE有提高第10天DM瘤胃消失率的趋势(P = 0.06)。瘤胃液短链脂肪酸谱未见相互作用或处理效应(P≥0.13)。瘤胃微生物组宏基因组分析显示,MFE与d之间存在交互作用(P = 0.01),在第20 d时,MFE在奶牛瘤胃中含量较低。在实验2中,与添加0.02% MFE的肉牛相比,添加0.04% MFE的肉牛平均日增重更低,试验结束时体重更轻(立方,P≤0.04)。饲粮中添加0.02% MFE组的料重比在MFE添加组中最高(立方、P &;lt;0.01)。饲粮中添加MFE可提高中性洗涤纤维的消化率(线性,P = 0.05)。饲粮中添加0.04% MFE的肉牛酸性洗涤纤维消化率最高(P = 0.03)。综上所述,饲粮中添加MFE提高了瘤胃消失率和消化率,但并未改善生长性能或改善瘤胃发酵。
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引用次数: 0
Differences in severity of reticulo-rumen pH drop in primiparous Holstein cows fed the same diet during transition and early lactation: effects on performance, energy balance, blood metabolites, and reproduction 在过渡期和泌乳早期,饲喂相同饲粮的初产荷斯坦奶牛网状瘤胃pH下降程度的差异:对生产性能、能量平衡、血液代谢产物和繁殖的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-24 DOI: 10.1093/jas/skae390
Ezequias Castillo-Lopez, Thomas Hartinger, Mohsen M Farghaly, Nicole Reisinger, Claudia Lang, Laura Klambauer, Johann Huber, Qendrim Zebeli
We recently reported factors leading to different severity of ruminal pH drop in primiparous cows fed the same diet during transition and early lactation. The present study evaluates the effects of those severities on performance and several blood and balance parameters in the same 24 primiparous cows from 3 wk before calving until wk 10 in lactation. Dietary concentrate was increased for all cows from 32 before calving to 60% (DM basis) over the first wk in lactation, resulting in a diet with 40% non-fiber carbohydrates (NFC), and 14.4% physically effective fiber (peNDF&gt;8). Ruminal pH was monitored with indwelling systems in all cows during the study; then several indices of duration and magnitude of pH change were used as indicators of the severity of ruminal pH drop. Accordingly, as reported in the companion paper, the cows were classified as either higher pH drop (HIGH; n = 9), moderate (MOD; n = 9) and lower (LOW; n = 6) severity of pH drop. In the present report, body weight, body condition score, and back fat thickness decreased but rumen mucosa thickness increased after calving in all cows (P &lt; 0.05). Post-partum daily energy intake in HIGH was greater (P &lt; 0.05) than the other categories. In addition, there were 5.6 kg extra of energy-corrected milk in HIGH (P &lt; 0.05). Independent of severity of pH drop, blood glucose, non-esterified fatty acids, beta-hydroxybutyrate, bilirubin and cortisol were higher, whereas triglycerides, total protein, globulin, albumin, urea nitrogen, cholesterol, calcium and phosphorous were lower at calving (P &lt; 0.05). Blood cholesterol was greater in HIGH than the other pH categories (P &lt; 0.05); insulin and reproductive variables were not affected by severity of pH drop. Overall, primiparous cows fed the same diet showed different severity of ruminal pH drop, but the individual variation in ruminal pH depression was not related to a negative impact on milk yield, energy balance or blood metabolites during the study. This indicates that the impact of low ruminal pH on the animals may depend not only on severity of the pH drop (average of 403 min/d of pH&lt;5.8 over 13 wk) but also on diet characteristics. Specifically, drops of ruminal pH can be tolerated by primiparous cows during the first 10 wk in milk consuming a diet containing 40% NFC and 14.4% peNDF&gt;8. It would be worth studying the severity of ruminal pH drop in a larger sample size during the entire lactation and if the severity is sustained on the next lactation.
我们最近报道了在过渡期和泌乳早期饲喂相同饲粮的初产奶牛,导致不同程度的瘤胃pH下降的因素。本研究评估了这些严重程度对24头奶牛产犊前3周至泌乳第10周的生产性能和若干血液和平衡参数的影响。在泌乳期第一周,将所有奶牛的饲粮精料从产犊前的32%增加到60% (DM基础),使日粮中非纤维碳水化合物(NFC)含量为40%,物理有效纤维含量为14.4% (peNDF>8)。在研究期间,采用留置系统监测所有奶牛的瘤胃pH;然后以pH变化的持续时间和幅度作为衡量瘤胃pH下降严重程度的指标。因此,正如论文中所报道的那样,奶牛被分类为pH值下降较高(HIGH;n = 9),适度(MOD;n = 9)和更低(LOW;n = 6) pH下降的严重程度。在本报告中,所有奶牛产犊后体重、体况评分和背部脂肪厚度均下降,但瘤胃黏膜厚度增加(P <;0.05)。产后每日能量摄入较高(P <;0.05)高于其他类别。此外,HIGH (P <;0.05)。与pH下降的严重程度无关,产犊时血糖、非酯化脂肪酸、β -羟基丁酸、胆红素和皮质醇较高,而甘油三酯、总蛋白、球蛋白、白蛋白、尿素氮、胆固醇、钙和磷较低(P <;0.05)。高pH组的血胆固醇高于其他pH组(P <;0.05);胰岛素和生殖变量不受pH下降严重程度的影响。总体而言,饲喂相同饲粮的奶牛瘤胃pH下降程度不同,但瘤胃pH下降的个体差异与研究期间产奶量、能量平衡或血液代谢物的负面影响无关。这表明,低瘤胃pH值对动物的影响可能不仅取决于pH值下降的严重程度(13周内平均为403 min/d),还取决于日粮特性。具体而言,在饲粮中添加40% NFC和14.4% pendf的情况下,初产奶牛在头10周内可以耐受瘤胃pH的下降。在整个泌乳过程中,在更大的样本量中研究瘤胃pH下降的严重程度,以及这种严重程度是否在下一次泌乳中持续下去,是值得研究的。
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引用次数: 0
LncRNA MSTRG.14227.1 regulates the morphogenesis of secondary hair follicles in inner mongolia cashmere goats via targeting ADAMTS3 by sponging chi-miR-433 LncRNA MSTRG.14227.1通过海绵化chi-miR-433靶向ADAMTS3调控内蒙古绒山羊次生毛囊的形态发生
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-23 DOI: 10.1093/jas/skae382
Rong Ma, Min Wang, Qing Ma, Yiming Zhang, Fangzheng Shang, Ruijun Wang, Yanjun Zhang
The cashmere goat is a type of livestock primarily known for its cashmere. Cashmere has a soft hand feel and good luster. It is a vital raw material in the textile industry, possessing significant economic value. Improving the yield and quality of cashmere can accelerate the development of the cashmere industry and increase the incomes of farmers and herdsmen. The embryonic stage is the main stage of the formation of hair follicle structure, which directly affects the yield and quality of cashmere. With the rapid advancements in modern molecular technology and high-throughput sequencing, many signaling molecules have been identified as playing critical roles in hair follicle development. Long non-coding RNA (lncRNA), which lacks protein-coding ability and exceeds 200 nucleotides in length, has been discovered to play a role in hair follicle development. In this study, the lncRNA MSTRG.14227.1, which is associated with the morphogenesis of secondary hair follicles, was screened and identified based on previously established lncRNA expression profiles derived from skin tissues of cashmere goats at different embryonic stages. This lncRNA has been shown to inhibit the proliferation and migration of dermal fibroblasts. Furthermore, we confirmed through bioinformatics analysis and dual-luciferase reporter assays that lncRNA MSTRG.14227.1 can function as a sponge for chi-miR-433, thereby alleviating the inhibitory effect of chi-miR-433 on its target gene ADAMTS3. In conclusion, the results of this study suggest that lncRNA MSTRG.14227.1 can inhibit the morphogenesis of secondary hair follicles through the chi-miR-433/ ADAMTS3 signaling axis.
羊绒山羊是一种主要以其羊绒而闻名的牲畜。羊绒手感柔软,光泽好。它是纺织工业的重要原料,具有重要的经济价值。提高羊绒的产量和质量,可以加快羊绒产业的发展,增加农牧民的收入。胚胎期是毛囊结构形成的主要阶段,直接影响羊绒的产量和品质。随着现代分子技术和高通量测序技术的快速发展,许多信号分子在毛囊发育中起着至关重要的作用。长链非编码RNA (lncRNA)缺乏蛋白质编码能力,长度超过200个核苷酸,已被发现在毛囊发育中起作用。本研究基于先前建立的不同胚胎期绒山羊皮肤组织lncRNA表达谱,筛选并鉴定了与次生毛囊形态发生相关的lncRNA MSTRG.14227.1。该lncRNA已被证明可以抑制真皮成纤维细胞的增殖和迁移。此外,我们通过生物信息学分析和双荧光素酶报告基因检测证实,lncRNA MSTRG.14227.1可以作为chi-miR-433的海绵,从而减轻chi-miR-433对其靶基因ADAMTS3的抑制作用。综上所述,本研究结果提示lncRNA MSTRG.14227.1可通过chi-miR-433/ ADAMTS3信号轴抑制次生毛囊的形态发生。
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引用次数: 0
Impact of dietary supplementation of beef cows with rumen-protected methionine during the periconceptional period on prenatal growth and performance to weaning 围孕期饲粮中添加保护瘤胃蛋氨酸对肉牛产前生长和断奶生产性能的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-19 DOI: 10.1093/jas/skae384
Daniella Heredia, Federico Tarnonsky, Maria C Lopez-Duarte, Mauro Venturini, Federico Podversich, Oscar A Ojeda-Rojas, Francisco Peñagaricano, Ricardo C Chebel, Daniel Luchini, Peter J Hansen, Nicolas DiLorenzo, Angela M Gonella-Diaza
Changes in maternal nutrition during the periconceptional period can influence postnatal growth in cattle. This study aimed to identify the impact of supplementing beef cows with rumen-protected methionine (RP-Met) during the periconceptional period on their female progeny. In exp 1, plasma methionine (Met) levels were analyzed in samples from 10 Angus crossbred, non-lactating beef cows. Cows were randomly assigned to receive 454 g of cottonseed meal with 15 g/d of RP-Met (RPM; Smartamine M, Adisseo) or not (CON) for 5 d and data were analyzed as a completely randomized design with repeated measures. A treatment-by-day interaction was observed (P &lt; 0.001), where plasma Met concentrations increased in the RPM treatment yet remained basal in CON. In exp 2, 114 cows were fed a roughage-based diet and randomized to receive 454 g/d of corn gluten supplemented with 15 g/d of RP-Met (RPM n = 56) or not (CON n = 58) from d -7 to 7 relative to timed artificial insemination (TAI) using sexed semen to obtain females. Amino acids were measured in plasma samples from d -8, 0, and 7 in cows. In the female progeny, body weight, withers height, body length, and heart girth were measured every 60 d from birth through weaning at an average age of 242 ± 5.8 d. Liver, adipose tissue, and longissimus dorsi muscle biopsies were collected at 187.88 ± 5.5 d of age and a subset of 20 random samples (CON = 10; RPM = 10) were selected for RNA-seq on each tissue. data were analyzed as a generalized randomized block design with repeated measures. Methionine was increased (P &lt; 0.01) in plasma from cows in the RPM treatment on d 0 and 7. After calving, 34 female calves (CON = 16; RPM = 18) remained in the study and no difference was observed in birth weights between treatments. Calves were taller at the withers for RPM than CON (P = 0.03; CON = 92 ± 1.0 cm; RPM = 95 ± 1 cm) but there were no effects of treatment on other measures of body size. A total of 30, 24, and 2 differentially expressed genes (DEGs; P &lt; 0.01) were observed in liver, longissimus dorsi muscle, and adipose tissue respectively. In summary, feeding RP-Met to cows in the periconceptional period resulted in female calves that were taller than CON before weaning. There were DEGs in the tissue samples but no other changes in measurements associated with body size. In conclusion, supplementation of RP-Met to beef cows during the periconceptional period caused minor changes in the female offspring before weaning.
围孕期产妇营养的变化会影响牛的产后生长。本研究旨在确定在受孕期添加保护瘤胃蛋氨酸(RP-Met)对肉牛雌性后代的影响。试验1分析了10头安格斯杂交非泌乳肉牛血浆蛋氨酸水平。奶牛随机饲喂454 g棉籽粕,添加15 g/d RP-Met (RPM;Smartamine M, Adisseo)或no (CON)治疗5 d,数据采用重复测量的完全随机设计进行分析。观察到每日治疗的相互作用(P <;在试验2中,114头奶牛以粗饲料为基础,在第7天至第7天随机饲喂454 g/d的玉米蛋白和15 g/d的RP-Met (RPM n = 56)和不饲喂(CON n = 58)的RP-Met (RPM n = 56),相对于使用性授精的定时人工授精(TAI)获得雌性。在奶牛d -8、0和7的血浆样品中测定氨基酸。雌性后代从出生到断奶,平均年龄为242±5.8 d时,每60 d测量一次体重、肩高、体长和心围。在187.88±5.5 d时,随机抽取20个样本进行肝脏、脂肪组织和背最长肌活检。RPM = 10)对每个组织进行rna测序。数据采用重复测量的广义随机区组设计进行分析。蛋氨酸增加(P <;RPM处理奶牛在第0天和第7天血浆中的含量为0.01)。产犊后,34头母牛犊(CON = 16;RPM = 18)仍在研究中,两种治疗方法的出生体重没有差异。RPM组犊牛肩隆高高于CON组(P = 0.03;CON = 92±1.0 cm;RPM = 95±1 cm),但治疗对其他体型测量没有影响。共有30、24和2个差异表达基因(DEGs;P, lt;肝脏、背最长肌和脂肪组织的脂肪含量分别为0.01)。综上所述,围孕期饲喂RP-Met可使断奶前犊牛的身高高于CON。在组织样本中有DEGs,但没有其他与体型相关的测量变化。综上所述,在受孕期向肉牛补充RP-Met对断奶前雌性后代的影响较小。
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引用次数: 0
Effects of a pre-weaning socialization system on piglet livability, lifetime growth performance, and subsequent sow performance 断奶前社会化系统对仔猪存活率、终身生长性能及随后母猪生产性能的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-19 DOI: 10.1093/jas/skae385
Larissa L Becker, Paula Giacomini, Mike D Tokach, Robert D Goodband, Joel M DeRouchey, Jason C Woodworth, Annie B Lerner, Jordan T Gebhardt
A total of 3,307 (PIC L 42) sows and 55,160 piglets were used to determine the effects of different farrowing systems on piglet livability and lifetime growth performance. Treatments were assigned to farrowing rooms and consisted of a conventional farrowing system (sows and piglets housed in individual farrowing stalls) or a pre-weaning socialization system (stall dividers removed between farrowing stalls and walkways within 6 to 24 h post-farrowing such that 12 to 32 litters of piglets were co-mingled). A total of 40 farrowing rooms with 80 stalls each were used with 20 rooms per treatment. Pigs were weaned at approximately 23 d of age. No differences were observed in lactation length, total born, born alive, stillborn, mummies, or number of pigs weaned. Pre-wean mortality was increased (P &lt; 0.001) for pigs from the pre-weaning socialization system compared to the conventional farrowing system (14.7 vs 12.6%, respectively). At weaning, a subset of offspring (4,313 pigs initially 5.4 ± 0.15 kg) were transported to a commercial research facility to evaluate lifetime performance. Weaning weights were heavier (P &lt; 0.001) for pigs in the conventional farrowing system compared to the pre-weaning socialization system. Pigs were housed in pens according to sow treatment with 44 to 46 pigs per pen and 48 pens per treatment. During the nursery and finishing periods, pigs from the conventional farrowing system had increased (P &lt; 0.001) BW, ADG, and ADFI, but decreased G:F compared to the pre-weaning socialization system. In the nursery phase, removals, mortality, and total removals and mortality were greater (P ≤ 0.059) for pigs raised in the pre-weaning socialization system than the conventional farrowing system, but no differences were observed in the finishing phase. Overall (d 23 to 183), pigs from the conventional farrowing system had increased (P ≤ 0.001) BW, ADG, and ADFI, but decreased (P = 0.010) G:F compared to the pre-weaning socialization system. No differences were observed for overall removals and mortality after weaning. Pigs from the conventional farrowing system had increased (P ≤ 0.094) live BW, HCW, carcass yield, loin depth, and percentage lean compared to the pre-weaning socialization system. No differences were observed in backfat. In summary, pigs raised in a conventional farrowing system had increased livability, lifetime growth performance, and improved carcass characteristics compared to the pre-weaning socialization system.
试验选用3307头(PIC l42)母猪和55160头仔猪,研究不同生产制度对仔猪存活率和终身生长性能的影响。处理被分配到产房,包括传统的产房系统(母猪和仔猪住在单独的产房中)或断奶前社会化系统(在分娩后6至24小时内拆除产房和人行道之间的产房隔板,以便12至32窝仔猪混合在一起)。共使用了40个产房,每个产房80个产房,每个治疗20个产房。猪在约23日龄断奶。在泌乳时间、总产仔数、活产仔数、死胎数、木乃伊数或断奶猪数方面均无差异。断奶前死亡率升高(P <;0.001),断奶前社会化系统的猪与传统分娩系统的猪相比(分别为14.7%和12.6%)。断奶时,一组后代(4,313头猪,初始体重5.4±0.15公斤)被运送到一个商业研究机构,以评估其终身生产性能。断奶体重更重(P <;0.001),与断奶前社会化系统相比,传统分娩系统中的猪。按母猪处理分组,每栏44 ~ 46头,每个处理48头。在苗期和育肥期,传统生产方式的猪的产仔率增加了(P <;0.001)体重、平均日增重和平均ADFI,但与断奶前社会化系统相比,G:F有所下降。断奶前社会化系统饲养的猪在苗期的清除率、死亡率、总清除率和死亡率均高于常规生产系统(P≤0.059),但在育肥期无显著差异。总体而言(第23 ~ 183天),与断奶前社会化系统相比,常规分娩系统猪的体重、平均日增重和平均日增重均增加(P≤0.001),但G:F下降(P = 0.010)。断奶后的总清除量和死亡率没有观察到差异。与断奶前社会化系统相比,常规分娩系统仔猪的活重、HCW、胴体产量、腰深和瘦肉率均有显著提高(P≤0.094)。在背部脂肪方面没有观察到差异。综上所述,与断奶前社会化系统相比,在传统分娩系统中饲养的猪具有更高的存活率、终身生长性能和更好的胴体特征。
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引用次数: 0
Effect of pre-farrowing hygiene routine (sub-standard vs. optimal) and creep feeding regime (dry pelleted starter diet vs. liquid mixture of milk replacer and starter diet) on post-weaning intestinal parameters and growth to slaughter in pigs 产前卫生习惯(次标准vs最佳)和蠕变饲喂方式(干颗粒状起始日粮vs乳化剂和起始日粮的液体混合物)对猪断奶后肠道参数和生长至屠宰的影响
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-18 DOI: 10.1093/jas/skae380
Shiv R Vasa, Gillian E Gardiner, Paul Cormican, Keelin O’Driscoll, Giuseppe Bee, Peadar G Lawlor
The objective was to evaluate the effect of providing dry pelleted starter diet (DPS) or a liquid mixture of milk replacer and starter diet (LMR+S) to suckling pigs housed in farrowing pens of sub-standard or optimal hygiene conditions on pig growth to slaughter, and post-weaning (PW) intestinal parameters. On day (d) 107 of gestation, 87 sows were randomly allocated to one of four treatments in a 2×2 factorial arrangement. The factors were creep feeding (DPS or LMR+S) and pre-farrowing hygiene routine (SUB-STANDARD or OPTIMAL). Pigs were provided with DPS (manually) from d11 to weaning (at d28±1.2 of age) or LMR+S using an automatic liquid feeding system from d4 to weaning. The SUB-STANDARD hygiene routine (pens washed and dried for ~18 h, sows not washed or disinfected) and the OPTIMAL hygiene routine (pens pre-soaked, detergent applied, washed, dried for 3 days, chlorocresol-based disinfectant applied, dried for 3 more days and sows washed and disinfected with Virkon) were used to obtain SUB-STANDARD or OPTIMAL hygiene conditions, respectively in farrowing rooms prior to entry of sows. Microbiome analysis was performed on fecal samples from 8 focal pigs/treatment, before weaning and at d21 and d114 PW. On d4 PW, 10 pigs/treatment were euthanized to collect intestinal tissue and digesta samples for histological, enzyme activity and microbiome analysis. Feeding LMR+S to pigs born into the OPTIMAL hygiene increased total dry matter intake compared to all of the other groups (P ≤ 0.05) and increased weaning weight compared to DPS feeding under both OPTIMAL and SUB-STANDARD hygiene conditions (P ≤ 0.05). Pigs from OPTIMAL farrowing pens had lower clinical cases of disease, diarrhoea prevalence and were slaughtered 3.8 days earlier than those from SUB-STANDARD farrowing pens (P ≤ 0.05). Suckling piglet mortality was reduced with LMR+S (P ≤ 0.05). On d4 PW, jejunal and ileal villus height were increased by OPTIMAL hygiene and ileal sucrase activity was increased by LMR+S (P ≤ 0.05). On d4 PW, LMR+S-fed pigs from OPTIMAL farrowing pens had lower relative abundance of Clostridium_P in the jejunum. In conclusion, the OPTIMAL hygiene routine increased pre-weaning LMR+S feed intake, reduced clinical cases of disease, improved intestinal structure and reduced the weaning to slaughter duration, while LMR+S feeding increased weaning weight, intestinal maturity and reduced pre-weaning mortality.
本试验旨在评价在卫生条件较差或较优的猪舍中饲喂干颗粒状起始日粮(DPS)或乳代用品与起始日粮的液体混合物(LMR+S)对猪的生长和断奶后肠道参数的影响。在妊娠第107天(d), 87头母猪按2×2因子排列随机分配到4个处理中的一个。影响因素为蠕变饲养(DPS或LMR+S)和分娩前卫生常规(不合标准或最佳)。在第11天至断奶(d28±1.2日龄)期间,采用人工饲喂DPS;在第4天至断奶期间,采用自动液体饲喂系统饲喂LMR+S。在母猪进入产房前,分别采用次标准卫生程序(猪舍清洗和干燥18小时,母猪不清洗或消毒)和最佳卫生程序(猪舍预浸泡,使用洗涤剂,清洗和干燥3天,使用氯甲酚类消毒剂,再干燥3天,母猪使用Virkon清洗和消毒)获得次标准或最佳卫生条件。在断奶前和第21和114胎重时,对8头病灶猪/治疗组的粪便样本进行微生物组分析。在PW第4天,每组10头猪实施安乐死,收集肠组织和食糜样本进行组织学、酶活性和微生物组分析。在最佳卫生条件下饲喂LMR+S的猪,与其他各组相比,总干物质采食量显著增加(P≤0.05),断奶重显著增加(P≤0.05)。最佳猪圈的猪临床发病和腹泻率低于次标准猪圈,屠宰期比次标准猪圈早3.8 d (P≤0.05)。LMR+S降低了乳猪死亡率(P≤0.05)。在第4胎时,优化卫生组提高了空肠和回肠绒毛高度,LMR+S组提高了回肠蔗糖酶活性(P≤0.05)。在第4 PW时,最佳猪圈LMR+ s喂养的猪空肠中Clostridium_P相对丰度较低。综上所述,最佳卫生习惯提高了断奶前LMR+S采食量,减少了临床疾病病例,改善了肠道结构,缩短了断奶至屠宰时间,而LMR+S饲喂提高了断奶体重、肠道成熟度,降低了断奶前死亡率。
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引用次数: 0
Partially replacing dietary starch with soybean oil improved production performance of weaned Rex rabbits 用大豆油部分替代饲粮淀粉可提高断奶獭兔的生产性能
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-17 DOI: 10.1093/jas/skae381
Ruiguang Gong, Yuan Chen, Zhen Li, Rui Zhang, Bing Song, Shuhui Wang, Xianggui Dong, Zhanjun Ren
The differences between the high-starch diet commonly used in rabbit farming and the natural feeding habits of rabbits may pose certain health risks. In our study, we replaced part of the starch in the feed with soybean oil and conducted a four-week feeding trial with weaned Rex rabbits. The results indicated that rabbits fed the oil-supplemented diet had a lower incidence of diarrhea, improved growth performance, and higher feed conversion efficiency, along with increased absorptive capacity of small intestine. Additionally, the composition of the cecal contents and fermentation patterns were altered; the concentration of ammonia in the cecum and the proportion of acetate among volatile fatty acids decreased, while the proportion of butyrate increased. Furthermore, the concentration of ammonia nitrogen in the cecum decreased, along with reductions in hepatic urea synthesis activity and urinary nitrogen excretion. These findings suggest that replacing part of the dietary starch with oil can enhance the production efficiency of Rex rabbits.
家兔养殖中常用的高淀粉日粮与家兔的自然喂养习惯存在差异,可能会造成一定的健康风险。在我们的研究中,我们用大豆油代替饲料中的部分淀粉,并对断奶獭兔进行了为期四周的喂养试验。结果表明,饲粮中添加油后,家兔腹泻发生率降低,生长性能改善,饲料转化率提高,小肠吸收能力增强。此外,盲肠内容物的组成和发酵模式也发生了变化;盲肠中氨的浓度和挥发性脂肪酸中乙酸的比例降低,而丁酸的比例升高。此外,盲肠内氨氮浓度下降,肝脏尿素合成活性和尿氮排泄减少。由此可见,以油代替部分淀粉可提高獭兔的生产效率。
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引用次数: 0
Effects Of Increasing Supplemental Zinc To Non-Implanted And Implanted Finishing Steers 为未植入和植入锌元素的育成牛增加补充锌元素的效果
IF 3.3 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Pub Date : 2024-12-14 DOI: 10.1093/jas/skae365
Elizabeth M Messersmith, Stephanie L Hansen
The effects of supplemental Zn within steroidal implant strategy on performance, carcass characteristics, trace mineral status, and muscle gene expression were tested in a 59-d study using 128 Angus-crossbred steers (492 ± 29 kg) in a 2 × 4 complete randomized design. Implant strategies included no implant (NoIMP) or Component TE-200 (TE200; Elanco, Greenfield, IN) administered on d 0. Zinc was supplemented at 0, 30, 100, or 150 mg Zn/kg dry matter (Zn0, Zn30, Zn100, Zn150, respectively) from ZnSO4. Steers were stratified by body weight (BW) to pens (n = 5 or 6 steers/pen) equipped with GrowSafe bunks (GrowSafe Systems Ltd., Airdrie, AB, Canada) and assigned treatments (n = 15, 16, or 17 steers/treatment). Cattle were weighed on d -1, 0, 18, and 59 with blood collected on d -1, 18, 40, and 59. Muscle samples were collected from the longissimus thoracis on d 11 and liver samples collected on d 55 or 56. Data were analyzed using the Mixed Procedure of SAS via contrast statements testing the linear and quadratic response to Zn supplementation within implant treatment and NoIMP vs. TE200 for performance, carcass, blood, and liver parameters. Specific contrast statements were formed for the analysis of gene expression in muscle including: Zn0 vs. Zn150 within NoIMP and TE200, NoIMP vs. TE200 (Zn0 and Zn150 only), and the linear effect of supplementing Zn0, Zn100, and Zn150 within TE200. Steer was the experimental unit. Day 18 BW and d 0-18 average daily gain (ADG) were linearly increased due to Zn supplementation within TE200 (P ≤ 0.002) in conjunction with a linear increase from Zn in d 11 muscle epidermal growth factor receptor, matrix metalloproteinase 2, and phosphodiesterase 4B gene expression of TE200 steers (P ≤ 0.05). Plasma Zn on d 18 and 40 linearly increased with increasing Zn supplementation regardless of implant treatment (P ≤ 0.03) and was lesser for TE200 than NoIMP steers on d 18 (P = 0.001). Day 59 BW and hot carcass weight (HCW) were greater for TE200 vs. NoIMP (P ≤ 0.002) and HCW of implanted steers tended to linearly increase with increasing Zn supplementation (P = 0.09). No effects of Zn supplementation were observed in NoIMP for HCW, BW, or ADG (P ≥ 0.17). Yield grade and 12th rib fat tended to quadratically decrease within NoIMP (P ≤ 0.09), with Zn100 being most lean. These data indicate increasing supplemental Zn influences steroidal implant signaling machinery while increasing the Zn status and implant-induced growth of feedlot cattle.
采用2 × 4完全随机设计,在甾体植入策略中添加Zn对128头(492±29 kg)安格斯杂交阉牛生产性能、胴体特性、微量矿物质状态和肌肉基因表达的影响进行了59天的研究。种植策略包括无种植体(NoIMP)或Component TE-200 (TE200);Elanco, Greenfield, IN)于第0天给药。分别以0、30、100、150 mg Zn/kg干物质(Zn0、Zn30、Zn100、Zn150)为补锌剂。根据体重(BW)将阉牛分层到配备GrowSafe床(GrowSafe Systems Ltd., Airdrie, AB, Canada)的栏(n = 5或6头/栏),并分配处理(n = 15、16或17头/组)。牛在第1、0、18和59天称重,并在第1、18、40和59天采血。第11天取胸最长肌肌肉标本,第55、56天取肝脏标本。采用SAS混合程序对数据进行分析,通过对比陈述测试在种植体治疗中补充锌和NoIMP与TE200对性能、胴体、血液和肝脏参数的线性和二次响应。形成了NoIMP和TE200中Zn0与Zn150、NoIMP与TE200(仅Zn0和Zn150)、TE200中添加Zn0、Zn100和Zn150的线性效应等具体的对比陈述。Steer是实验单位。在TE200范围内添加锌可线性提高TE200肉牛第18天的体重和0 ~ 18天的平均日增重(ADG) (P≤0.002),并可线性提高TE200肉牛第11天肌肉表皮生长因子受体、基质金属蛋白酶2和磷酸二酯酶4B基因表达(P≤0.05)。血浆锌在第18天和第40天随锌添加量的增加而线性增加(P≤0.03),TE200组在第18天低于NoIMP组(P = 0.001)。TE200的第59天体重和热胴体重(HCW)高于NoIMP (P≤0.002),且HCW随锌添加量的增加呈线性增加趋势(P = 0.09)。NoIMP中锌的补充对HCW、BW和ADG没有影响(P≥0.17)。在NoIMP范围内,产量等级和12肋脂呈二次降低趋势(P≤0.09),以Zn100最瘦。这些数据表明,增加锌添加量会影响类固醇植入物的信号机制,同时增加锌状态和植入物诱导的生长。
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Journal of animal science
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