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Animal Nutrition 2023年第4期15卷 1-9页

作者： Zebang Xu Bin Yang Kangle Yi Tianrong Chen Xinxin Xu Ao Sun Haobang Li Jianbo Li Fang He Cheng Huan Yang Luo Jiakun Wang Institute of Dairy Science College of Animal SciencesZhejiang UniversityHangzhou310058China School of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou310023China Hunan Institute of Animal and Veterinary Science Changsha410131China

Eco-friendly and efficient strategies for eliminating cadmium (Cd) phytoremediation plant residues are needed. The present study investigated the feasibility of feeding Cd accumulator maize to beef cattle. In total, 20 cattle at 6 months of age were selected and randomly allocated into two groups fed with 85.82%(fresh basis) Cd accumulator maize (CAM) or normal maize (control [Con]) silage diets for 107 d. Feeding CAM did not affect the body weight (P=0.24), while it decreased feed intake and increased feed efficiency of beef cattle (P beef cattle, but did present risks to cattle health and production safety, and decreased the meat nutrition and flavor. Further research must be performed to determine whether a lower proper dose of phytoremediation maize and an appropriate feeding period may be possible to ensure no risk to cattle health and the supply of safe meat for humans.

关键词： beef cattle Cadmium Performance Health

Sequence Variations in the Bovine IGF-I and IGFBP3 Genes and Their Association with Growth and Development Traits in Chinese beef cattle

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Agricultural Sciences in China 2009年第6期8卷 717-722页

作者： GAO Xue SHI Ming-yan XU Xiu-rong LI Jun-ya REN Hong-yan XU Shang-zhong Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 P.R.China Life Science Department Luoyang Normal College Luoyang 471022 P.R.China College of Animal Science Northwest A＆F University Yangling 712100 P.R. China

The objective of this study was to determine the genotype effects of the bovine insulin-like growth factor Ⅰ （IGF-Ⅰ） and its binding protein 3 （IGFBP3） genes on growth and development traits in beef cows, including 130 Chinese Simmental, 42 Nanyang, and 47 Luxi Yellow cattle. Sequence variations in the bovine IGF-Ⅰ and IGFBP3 genes were investigated by single strand conformation polymorphism （SSCP）. SSCPs were detected in 6 fragments, which is the 5＇-flanking region, the 2nd exon, the 5th exon, and the 5th intron of the IGF-1 gene, and the 2nd exon, the 3rd exon of the 1GFBP3 gene. Two polymorphisms, an A-to-G transition in the 2rid exon of the IGF-Ⅰ gene and a T-to-C transition in the 2rid exon of IGFBP3 gene were detected in 3 breeds. The allele frequencies of 2 polymorphisms were 0.0411 （A）, 0.9589 （B）, and 0.7237 （A）, 0.2763 （B）, respectively. These 2 loci were analyzed to associate with body weight, height at withers, body length, heart girth, rump width, and beef production index （BPI） at 0, 6, 12, 24, and 36-month old. The IGFBP3 locus was shown to be associated with rump width, heart girth at 24-month and 36-month. Animals with BB genotype had higher rump width （24.86 ± 0.47） cm at 24-month and （27.50 ± 0.63） em at 36-month. The heart girth was highest for the individuals with BB genotype （171.33 ± 1.84） cm and higher than those with AB genotype （166.68 ± 1.13） cm （P〈 0.05） at 36-month.

关键词： beef cattle IGF-1 gene 1GFBP3 gene growth and development traits PCR-SSCP

Residual feed intake in beef cattle and its association with carcass traits, ruminal solid-fraction bacteria, and epithelium gene expression

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Journal of Animal Science and Biotechnology 2018年第4期9卷 878-890页

作者： Ahmed A.Elolimy Mohamed K.Abdelmegeid Joshua C.McCann Daniel W.Shike Juan J.Loor Mammalian NutriPhysioGenomics Department of Animal SciencesUniversity of Illinois Department of Animal Sciences University of Illinois Faculty of Veterinary Medicine Kafrelsheikh University Division of Nutritional Sciences Illinois Informatics Institute University of Illinois

Background: Residual feed intake(RFI) describes an animal’s feed efficiency independent of growth *** objective of this study was to determine differences in growth performance, carcass traits, major bacteria attached to ruminal solids-fraction, and ruminal epithelium gene expression between the most-efficient and the least-efficient beef cattle. One-hundred and forty-nine Red Angus cattle were allocated to three contemporary groups according to sex and herd origin. Animals were fed a finishing diet in confinement for 70 d to determine the RFI category for each. Within each group, the two most-efficient(n = 6; RFI coefficient =-2.69 ± 0.58 kg dry matter intake(DMI)/d) and the two least-efficient animals(n = 6; RFI coefficient = 3.08 ± 0.55 kg DMI/d) were selected. Immediately after slaughter, ruminal solids-fraction and ruminal epithelium were collected for bacteria relative abundance and epithelial gene expression analyses, respectively, using real-time ***: The most-efficient animals consumed less feed(P = 0.01; 5.03 kg less DMI/d) compared with the leastefficient animals. No differences(P > 0.10) in initial body weight(BW), final BW, and average daily gain(ADG) were observed between the two RFI classes. There were no significant RFI × sex effects(P > 0.10) on growth *** with the least-efficient group, hot carcass weight(HCW), ribeye area(REA), and kidney, pelvic, and heart fat(KPH) were greater(P ≤ 0.05) in the most-efficient cattle. No RFI × sex effect(P > 0.10) for carcass traits was detected between RFI groups. Of the 10 bacterial species evaluated, the most-efficient compared with least efficient cattle had greater(P ≤ 0.05) relative abundance of Eubacterium ruminantium, Fibrobacter succinogenes, and Megasphaera elsdenii, and lower(P ≤ 0.05) Succinimonas amylolytica and total bacterial density. No RFI × sex effect on ruminal bacteria was detected between RFI groups. Of the 34 genes evaluated in ruminal epithelium, the most

关键词： beef cattle Carcass Gene expression Growth RFI Ruminal bacteria Ruminal epithelium Sex

Effects of Plant Oil Mixture on Production Performance,Carcass and beef Quality in beef cattle

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Animal Husbandry and Feed Science 2011年第6期3卷 12-16页

作者： XIA Guang-jun YAN Chang-guo LIU Cheng-ming Agricultural College Yanbian University Yanji 133000 China Hunchun Tianyi Livestock Husbandry Co. Ltd. Hunchun 133300 China

[Objective] To study the effects of plant oil mixture on production performance, carcass and beef quality in beef cattle. [Method] Single-factor randomized blocks design was used. Sixteen healthy Yanbian yellow bulls having close body weight were selected and randomly divided into four groups, four cattle per group. Been oil, safflower oil and sunflower oil were mixed respectively at a volume ratio of 11：5：4. The oil blend was added to the daily diets of beef cattle respectively at a proportion of 4%, 5% and 6%. The effects of the plant oil mixture on production performance, carcass and beef quality were investigated. [ Result.] Compared with the control cattle, the experimental cattle had significantly lower feed intake （P 〈 0.05）, non-significantly higher efficiency of feed utilization, and significantly lower digestibility of crude fiber and calcium （P 〈 0.05）. With the increasing level of plant oil, the digestibility of dry matter showed a decreasing trend. The digestibility of dry matter was significantly lower in the cattle fed on the plant oil mixture at a level of 6% than in the control （ P 〈 0.05）. The plant oil mixture had no effect on the digestibility of crude protein, ether extract, crude ash, nitrogen-free extract and phosphorus. With the increasing level of plant oil, the serum content of high-density lipoprotein showed an increasing trend. The serum content of high-density lipoprotein was significantly higher in the cattle fed on the plant oil mixture at a level of 6% than in the control （ P 〈 0.05）. With the increasing level of plant oil, the content of total cholesterol showed an increasing trend, whereas the content of low-density lipoprotein showed a decreasing trend. Moreover, other indicators did not change significantly. The experimental cattle had larger eye muscle area and better beef quality than the control group. The content of crude protein and ether extract in beef increased with the increasing level of plant oil. [ Conclusion] The plan

关键词： Plant oil beef cattle Production performance Carcass beef quality

Variations in Reproductive Hormones during Estrus Cycle in Local beef cattle from Jilin of China

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Animal Husbandry and Feed Science 2010年第4期2卷 14-17页

作者： LI Cheng-jiao WANG Hong-juan LI Chun-jin ZHOU Xu College of Animal Science and Veterinary Medicine Jilin University Changchun 130062 China

[ Objective] To provide a theoretical basis for improving reproductive efficiency of domestic beef cattle in Jilin of China. [ Method] China Red Steppe cattle, Yanbian yellow cattle and Simmental cattle in Jilin Province were used for detection. The levels of progesterone （P4）, estradiol （ E2 ）, follicle-stimulating hormone （FSH） and luteinizing hormone （LH） in serum and urine during estrus cycle were determined. [ Result] The levels of P4 and E2 were significantly different between pregnant cattle and non-pregnant cattle on Day 21 post estrus （ P 〈 0.01 ）. The level of LH on estrus day was significantly different from that on the other days of estrus cycle （ P 〈 0.05）. [ Conclusion] It is feasible to detect P4 level for diagnosis of estrus and eady pregnancy in beef cattle.

关键词： Reproductive hormones Estrus cycle beef cattle

Rumen Degradation Characteristics of Six Types of Common Roughage in Khorchin beef cattle in Tongliao City

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Animal Husbandry and Feed Science 2018年第3期10卷 201-205页

作者： Huo Xiaowei Wuha Gantu College of Animal Science and Technology Inner Mongolia University for Nationalities Tongliao 028000 China Epidemic Control Center of Ongniud Bannar Agriculture and Animal Husbandry Bureau Chifeng 024500 China

[Objective] The paper was to study the degradation characteristics of different types of roughage in Khorchin beef cattle. [Method] The nylon bag method was used to determine the rumen degradability of six types of roughage： dry matter （DM）, crude protein （CP）, neutral detergent fiber （NDF） and acid detergent fiber （ADF）. [Result] Among the six types of roughage, alfalfa hay had the highest effective degradability of DM and CP in rumen; followed by alfalfa block, corn silage, leymus chinensis and corn stover, and the effective degradability of rice straw was lowest. In terms of effective degradability of NDF and ADF, alfalfa hay was the most effective, while leymus chinensis was the least effective. [Conclusion] Considering degradation characteristics of six types of roughage in Khorchin beef cattle, alfalfa hay possesses the highest nutritional value, while rice straw has the lowest value.

关键词： beef cattle Rumen degradability Nylon-bag method

Discovery of novel genetic networks associated with 19 economically important traits in beef cattle

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Discovery of novel genetic networks associated with 19 econo...

Effects of Maize Silage Harvest Stage on Growth Performance and Economic Benefits of beef cattle

中国畜牧兽医学会第七届养牛学分会2009年学术研讨会

作者： Jennifer J.Michal Tyler F.Daniels Tanja Kunej Charles T.Gaskins Jan R.Busboom Leeson J.Alexander Raymond W.Wright Michael D.MacNeil Department of Animal Sciences Washington State UniversityPullmanWA 99164-6351 USDA-ARS Fort Keogh Livestock and Range Research LaboratoryMiles CityMT 59301

Quantitative or complex traits are determined by the combined effects of many loci,and are affected by genetic networks or molecular *** the present study,we genotyped a total of 138 mutations,mainly single nucleotide polymorphisms derived from 71 functional genes on a Wagyu x Limousin reference *** hundred forty six F animals were measured for 5 carcass,6 eating quality and 8 fatty acid composition traits.A total of 2,280 single marker-trait association runs with 120 tagged mutations selected based on the HAPLOVIEW analysis revealed 144 significant associations(P<0.05),but 50 of them were removed from the analysis due to the small number of animals(≤9) in one genotype group or absence of one genotype among three *** remaining 94 single-trait associations were then placed into three groups of quantitative trait modes(QTMs) with additive,dominant and overdominant *** significant markers and their QTMs associated with each of these 19 traits were involved in a linear regression model analysis,which confirmed single-gene associations for 4 traits,but revealed two-gene networks for 8 traits and three-gene networks for 5 *** genetic networks involving both genotypes and QTMs resulted in high correlations between predicted and actual values of performance,thus providing evidence that the classical Mendelian principals of inheritance can be applied in understanding genetic complexity of complex *** present study also indicated that carcass, eating quality and fatty acid composition traits rarely share genetic ***,marker-assisted selection for improvement of one category of these traits would not interfere with improvement of another.

关键词： Quantitative traits quantitative trait modes genetic networks beef cattle

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Agricultural Biotechnology 2023年第2期12卷 48-50页

作者： Shuo YANG Miaoyi ZHANG Yancheng ZHOU Huihui LIU Yuping LIU Yuqi LIU Boyang LI Yi LI Mingjie YIN Xiaoliang PEI Tangshan Food and Drug Comprehensive Testing Center Tangshan 063000China The Academician Workstation of Tangshan Food and Drug Comprehensive Testing Center Tangshan 063000China Tangshan Functional Agricultural Products Industrial Technology Research Institute Tangshan 063000China

[Objectives]This study aimed to investigate the effects of whole-crop maize silage harvested at different stages on growth and economic benefits of beef cattle.[Methods]A total of 30 Simmental crossbred cattle weighing about 378 kg were randomly divided into three groups,respectively fed for 70 days with whole-crop maize silage harvested at milk stage(GroupⅠ),dough stage(GroupⅡ)and physiological maturity stage(GroupⅢ).Moreover,the cattle in all groups were given the same concentrate diet.[Results]There were significant differences in dry matter,crude protein and neutral detergent fiber between whole-crop maize silages harvested at different stages(P0.05).The dry matter intake in GroupⅡwas significantly higher than that in GroupⅠ(P0.05).The economic benefit in GroupⅡwas the highest,up to 9.99 yuan/day per capita.,followed by that in GroupⅢ,9.79 yuan/day per capita,and that in GroupⅠwas the lowest,only 8.03 yuan/day per capita.[Conclusions]The whole-crop maize silage harvested at dough stage has the best quality and produces the highest economic returns for beef cattle.

关键词： Harvest stage Whole-crop maize silage beef cattle Growth performance Economic benefits

Prevalence and fuoroquinolone resistance of Campylobacter *** from beef cattle in Japan

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Animal Diseases 2022年第3期2卷 181-186页

作者： Yoshimasa Sasaki Hiroshi Asakura Tetsuo Asai Division of Biomedical Food Research National Institute of Health Sciences3‑25‑26TonomachiKawasaki‑kuKawasakiKanagawa 210‑9501Japan The United Graduate School of Veterinary Science Gifu University1‑1YanagidoGifu 501‑1193Japan

beef is a source of human Campylobacter *** treatment is needed when patients are immuno‑compromised or have other ***,we investigated the prevalence and antimicrobial resistance of Campylobacter *** beef cattle in *** swab samples were collected from 164 beef cattle at an abattoir between March 2021 and August 2021,and Campylobacter *** isolated from 94(57.3%)*** and *** were isolated from 68 and 26 cattle,*** Campylobacter jejuni,the resistant rates against ampicillin,tetracycline and ciprofoxacin were 20.6,75.0 and 64.7%,*** ***,the resistant rates against ampicil‑lin,tetracycline and ciprofoxacin were 53.8,76.9 and 88.5%,*** Campylobacter isolates were resistant to *** multilocus sequence typing,*** and *** isolates were classifed into 22 and 2 sequence types(STs).The top three STs of *** were ST806(12 isolates),ST21(nine isolates),and ST459(eight isolates).The most frequent ST of *** was ST1068(23 isolates).The results suggest that Campylobacter *** prevalent in the gastrointestinal tract of beef cattle slaughtered at ***,the administration of erythromycin is efec‑tive against human campylobacteriosis caused by beef *** the prevalence and antimicrobial resistance of Campylobacter *** beef cattle could be useful for managing the risk of human campylobacteriosis.

关键词： Antimicrobial resistance beef cattle Campylobacter Fluoroquinolone resistance Multilocus sequence typing

Effects of Different Wind Speeds behind Windbreak Wall of Fattening cattle Farm on Farm Environment and Performance of beef cattle in Zhangye District

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Animal Husbandry and Feed Science 2019年第5期11卷 140-144页

作者： Xiong Haozhe Chen Zhaohui Xu Yiming Yang Hao Liu Jijun College of Animal Science and Technology China Agricultural University/State Key Laboratory of Animal NutritionBeijing 100193China

[Objective]The paper was to study the wind-reducing effect of windbreak wall at different sheltering distances and the effects of wind speed on cattle performance.[Method]The 40 cattle with insignificant difference in initial weight were randomly distributed in four selected stalls,and were divided into two groups according to the distance between stalls and windbreak wall to measure their daily *** to the actual conditions and weather conditions of fattening cattle farm,the wind speed,temperature and other environmental indexes of measuring point and heat production of beef cattle were carried out field measurement and analysis.[Result]The windbreak wall in fattening cattle farm reduced the wind speed by 40%-70%within a horizontal distance of 10 times of the wall height at a height of 1.2 *** best sheltered area behind windbreak wall was 2-4 times of the height of windbreak *** the distance of 6 times of the wall height,the wind speed reduction effect was obvious and the maximum reduction rate reached 70%.With an external WCI of-15.61 and average beef cattle weight of 480 kg,the WCI of fattening cattle farm equipped with windbreak wall reached-9.00,and the heat loss reduced by each cow was 3.31 MJ/***,due to the difference in distance from windbreak wall,the daily gain difference of beef cattle was 0.15 kg/head day,but the difference was not significant(P>0.05).

关键词： beef cattle Windbreak wall Daily gain