|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Effects of thymol and carvacrol supplementation on intestinal integrity and immune responses of broiler chickens challenged with Clostridium perfringens显示文摘Background: Necrotic enteritis caused by Clostridium perfringens infection leads to serious economic losses in the global poultry production. In the present study, we investigated the protective effects of essential oils(EO, which contained 25 % thymol and 25 % carvacrol as active components) supplementation on growth performance, gut lesions, intestinal morphology, and immune responses of the broiler chickens infected with C. perfringens. A total of448 1-day-old male broiler chicks were allocated into eight treatment groups following a 4 × 2 factorial arrangement with four dietary EO dosages(0, 60, 120, or 240 mg/kg) and two infection status(with or without C. perfringens challenge from d 14 to 20).Results: The challenge did not impair the growth performance of birds, but induced gut lesions and increased crypt depth in the ileum(P ≤ 0.05). It also down-regulated the claudin-1 and occludin m RNA expression(P ≤ 0.05),up-regulated the m RNA expression of interleukin-1β(P ≤ 0.05), tended to increase the toll-like receptor(TLR)2 m RNA expression(P < 0.10) in the ileum, and enhanced the mucosal secretory Ig A production(P ≤ 0.05). In the challenged birds, dietary EO supplementation linearly alleviated the gut lesions and improved the ratio of vil us height to crypt depth(P ≤ 0.05), and the supplementation of 120 and 240 mg/kg EO increased the serum antibody titers against Newcastle disease virus(P ≤ 0.05). Regardless of challenge, the EO supplementation showed a tendency to linearly elevate the feed conversion efficiency between 14 and 28 d of age as well as the occludin m RNA expression(P < 0.10), and linearly inhibited the m RNA expression of TLR2 and tumor necrotic factor-α in the ileum(P ≤ 0.05).Conclusions: The dietary supplementation of EO could alleviate the intestinal injury by improving intestinal integrity and modulating immune responses in the C. perfringens-challenged broiler chickens. | Encun Du Weiwei Wang Liping Gan Zhui Li Shuangshuang Guo Yuming Guo | 2016 | Journal of Animal Science and Biotechnology2016，7，4： | 43 |
| 2 | Effects of Lactobacillus acidophilus on the growth performance and intestinal health of broilers challenged with Clostridium perfringens显示文摘Background: Clostridium perfringens is the main etiological agent of necrotic enteritis. Lactobacil i show beneficial effects on intestinal health in infectious disease, but the protective functions of lactobacil i in C. perfringens-infected chickens are scarcely described. This study examined the effects of Lactobacil us acidophilus(L. acidophilus) on the growth performance and intestinal health of broiler chickens chal enged with Clostridium perfringens(C. perfringens) over a 28-day period. Using a 2 × 2 factorial arrangement of treatments, a total of 308 1-day-old male Arbor Acres broiler chicks were included to investigate the effects of Lactobacil us acidophilus(L. acidophilus) on the growth performance and intestinal health of broiler chickens chal enged with Clostridium perfringens(C. perfringens) during a 28-day trial.Results: During infection(d 14–21), C. perfringens challenge decreased the average daily gain(P < 0.05), and increased feed conversion ratio and the mortality rate(P < 0.05). However, dietary supplementation with L. acidophilus increased the body weight of C. perfringens-infected broilers on d 21(P < 0.05), and tended to decrease the mortality(P = 0.061).C. perfringens challenge decreased the villus height(P < 0.05), the ratio of villus height to crypt depth(P < 0.05) and OCLN(occludin) m RNA expression(P < 0.05), and increased the pro-inflammatory cytokine expression in the spleen and jejunum, the intestinal populations of C. perfringens and Escherichia(P < 0.05), and the serum content of endotoxin(P < 0.05), regardless of L. acidophilus supplementation. In contrast, dietary L. acidophilus reducedthe intestinal lesion score of challenged broilers(P < 0.05), the m RNA expression of pro-inflammatory cytokines, ileal populations of Escherichia and serum endotoxin content(P < 0.05), but increased the intestinal Lactobacillus populations(P < 0.05),irrespective of C. perfringens challenge.Conclusion: Dietary addition of L. acidophilus could improve the intestinal health and reduce the mortality of broilers suffering from necrotic enteritis. | Zhui Li Weiwei Wang Dan Liu Yuming Guo | 2018 | Journal of Animal Science and Biotechnology2018，9，3： | 22 |
| 3 | In vitro antibacterial activity of thymol and carvacrol and their effects on broiler chickens challenged with Clostridium perfringens显示文摘Background:In the post-antibiotic era,essential oils(EO) are promising alternatives to growth-promoting antibiotics.The aim of the present study was to investigate the antibacterial activities of an EO product and its components thymol and carvacrol in vitro,and the efficacy of EO to control Clostridium perfringens challenge in broiler chickens.Results:The in vitro minimum inhibitory concentration assay showed strong antibacterial activity of the EO product,thymol,and carvacrol against pathogenic Escherichia coli,C.perfringens,and Salmonella strains,and weak activity towards beneficial Lactobacillus strains.Besides,an additive effect was observed between thymol and carvacrol.The in vivo study was carried out with 448 male broiler chicks following a 4 × 2 factorial arrangement to test the effects of EO supplementation(0,60,120,or 240 mg/kg EO in wheat-based diet),pathogen challenge(with or without oral gavage of C perfringens from day 14 to day 20) and their interactions.Each treatment consisted of eight replicate pens(seven birds/pen).The challenge led to macroscopic gut lesions,and resulted in a significant increase in ileal populations of C.perfringens and Escherichia subgroup(P< 0.05) on day 21.Dietary EO supplementation did not influence C perfringens numbers,but linearly alleviated intestinal lesions on day 21 and 28(P=0.010 and 0.036,respectively),and decreased Escherichia populations in ileum with increased EO dosages(P=0.027 and 0.071 for day 21 and 28,respectively).For caecum,EO quadratically influenced Lactobacillus populations on day 21(p=0.002),and linearly decreased the numbers of total bacteria and Escherichia on day 28(P=0.026 and 0.060,respectively).Mean thymol and carvacrol concentrations in the small intestine were 0.21 and 0.20 μg/g in intestinal digesta(wet weight),respectively,for birds fed 60 mg/kg EO,and 0.80 and 0.71 μg/g,respectively,for birds fed 240 mg/kg EO.Conclusions:These results indicated that dietary EO supplementation could affect intestinal microbiota and alleviate intestinal lesions in broilers,which may contribute in controlling C.perfringens infection in broiler chickens. | Encun Du Liping Gan Zhui Li Weiwei Wang Dan Liu Yuming Guo | 2016 | Journal of Animal Science and Biotechnology2016，7，1： | 14 |
| 4 | Effect of Yiqibushenhuoxue decoction on chronic obstructive pulmonary disease measured by St. George's respiratory disease questionnaire scores and forced expiratory volume显示文摘OBJECTIVE: To investigate the effects of Yiqibushenhuoxue decoction on stable chronic obstructive pulmonary disease(COPD) by observing its influences on patients' quality of life and airway inflammation.METHODS: Seventy patients with stable COPD were randomly divided into a treatment group(n=35) treated with Yiqibushenhuoxue decoction plus Seretide and a control group(n=35) treated with Seretide only.The dosage of Yiqibushenhuoxue decoction was 100 mL each time, twice a day, and the dosage of Seretide was salmeterol 50 μg/fluticasone 250 μg twice a day. Both groups were treated for 12 weeks. Before and after the treatment, St George's respiratory disease questionnaire(SGRQ)scores,forced expiratory volume,and forced expiratory volume in 1 second/forced vital capacity(FEV1/FVC)were measured.RESULTS:The SGRQ scores in both groups were significantly lower than those before treatment(P<0.05). After treatment, the total SGRQ scores and each subscore in the treatment group were significantly lower than those in the control group(P<0.05). The percentage of the predicted FEV1% and FEV1/FVC were higher in both groups, but no statistical differences were detected from before to after the treatment or between the two groups(P>0.05).CONCLUSION: Yiqibushenhuoxue decoction could significantly decrease the SGRQ scores in patients with stable COPD, which suggests that it is able to improve patient symptoms. | Jianqiu Liu Fengli Gao Zhuying Li | 2014 | Journal of Traditional Chinese Medicine2014，34，4： | 8 |
| 5 | Chemoprophylaxis, diagnosis, treatments, and discharge management of COVID-19: An evidence-based clinical practice guideline(updated version)显示文摘The novel severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is the cause of a rapidly spreading illness,coronavirus disease 2019(COVID-19),affecting more than seventeen million people around the world.Diagnosis and treatment guidelines for clinicians caring for patients are needed.In the early stage,we have issued'A rapid advice guideline for the diagnosis and treatment of 2019 novel coronavirus(2019-nCoV)infected pneumonia(standard version)';now there are many direct evidences emerged and may change some of previous recommendations and it is ripe for develop an evidence-based guideline.We formed a working group of clinical experts and methodologists.The steering group members proposed 29 questions that are relevant to the management of COVID-19 covering the following areas:chemoprophylaxis,diagnosis,treatments,and discharge management.We searched the literature for direct evidence on the management of COVID-19,and assessed its certainty generated recommendations using the Grading of Recommendations,Assessment,Development and Evaluation(GRADE)approach.Recommendations were either strong or weak,or in the form of ungraded consensus-based statement.Finally,we issued 34 statements.Among them,6 were strong recommendations for,14 were weak recommendations for,3 were weak recommendations against and 11 were ungraded consensus-based statement.They covered topics of chemoprophylaxis(including agents and Traditional Chinese Medicine(TCM)agents),diagnosis(including clinical manifestations,reverse transcription-polymerase chain reaction(RT-PCR),respiratory tract specimens,IgM and IgG antibody tests,chest computed tomography,chest X-ray,and CT features of asymptomatic infections),treatments(including lopinavirritonavir,umifenovir,favipiravir,interferon,remdesivir,combination of antiviral drugs,hydroxychloroquine/chloroquine,interleukin-6 inhibitors,interleukin-1 inhibitors,glucocorticoid,qingfei paidu decoction,lianhua qingwen granules/capsules,convalescent plasma,lung transplantation,invasive or noninvasive ventilation,and extracorporeal membrane oxygenation(ECMO)),and discharge management(including discharge criteria and management plan in patients whose RT-PCR retesting shows SARS-CoV-2 positive after discharge).We also created two figures of these recommendations for the implementation purpose.We hope these recommendations can help support healthcare workers caring for COVID-19 patients. | Ying-Hui Jin Qing-Yuan Zhan Zhi-Yong Peng Xue-Qun Ren Xun-Tao Yin Lin Cai Yu-Feng Yuan Ji-Rong Yue Xiao-Chun Zhang Qi-Wen Yang Jianguang Ji Jian Xia Yi-Rong Li Fu-Xiang Zhou Ya-Dong Gao Zhui Yu Feng Xu Ming-Li Tu Li-Ming Tan Min Yang Fang Chen Xiao-Ju Zhang Mei Zeng Yu Zhu Xin-Can Liu Jian Yang Dong-Chi Zhao Yu-Feng Ding Ning Hou Fu-Bing Wang Hao Chen Yong-Gang Zhang Wei Li Wen Chen Yue-Xian Shi Xiu-Zhi Yang Xue-Jun Wang Yan-Jun Zhong Ming-Juan Zhao Bing-Hui Li Lin-Lu Ma Hao Zi Na Wang Yun-Yun Wang Shao-Fu Yu Lu-Yao Li Qiao Huang Hong Weng Xiang-Ying Ren Li-Sha Luo Man-Ru Fan Di Huang Hong-Yang Xue Lin-Xin Yu Jin-Ping Gao Tong Deng Xian-Tao Zeng Hong-Jun Li Zhen-Shun Cheng Xiao-Mei Yao Xing-Huan Wang | 2020 | Military Medical Research2020，7，3： | 6 |
| 6 | Symptom network topological features predict the effectiveness of herbal treatment for pediatric cough显示文摘Pediatric cough is a heterogeneous condition in terms of symptoms and the underlying disease mechanisms.Symptom phenotypes hold complicated interactions between each other to form an intricate network structure.This study aims to investigate whether the network structure of pediatric cough symptoms is associated with the prognosis and outcome of patients.A total of 384 cases were derived from the electronic medical records of a highly experienced traditional Chinese medicine (TCM) physician.The data were divided into two groups according to the therapeutic effect,namely,an invalid group (group A with 40 cases of poor efficacy) and a valid group (group B with 344 cases of good efficacy).Several well-established analysis methods,namely,statistical test,correlation analysis,and complex network analysis,were used to analyze the data.This study reports that symptom networks of patients with pediatric cough are related to the effectiveness of treatment: a dense network of symptoms is associated with great difficulty in treatment.Interventions with the most different symptoms in the symptom network may have improved therapeutic effects. | Mengxue Huang Jingjing Wang Runshun Zhang Zhuying Ni Xiaoying Liu Wenwen Liu Weilian Kong Yao Chen Tiantian Huang Guihua Li Dan Wei Jianzhong Liu Xuezhong Zhou | 2020 | Frontiers of Medicine2020，14，3： | 4 |
| 7 | Composition-structure-property relationships of the CaO-MxOy-SiO2-P2O5 (M =Zr,Mg,Sr) mesoporous bioactive glass (MBG) scaffolds显示文摘 | ZhuY Li X YaugJ | 2011 | J Mater Chem2011，21，25： | 1 |
| 8 | Effect of 15-HETE on potassium channels of rabbit pulmonary arterial smooth muscles during hypoxia显示文摘 | Han Weina Li Xianghui Jiang Zhuying | 2004 | Acta Physiol Sin2004，56，5： | 1 |
| 9 | Matrix attachment regions included in a bicistronic vector enhances and stabilizes follistatin gene expressions in both transgenic cells and transgenic mice显示文摘In the present study, follistatin(FST) gene expression vectors with either a bicistronic gene transfer cassette alone, or a bicistron gene cassette carrying a matrix attachment region(MAR) were constructed and transfected to bovine fetal fibroblasts. Evaluations of both the integration and expression of exogenous FST indicated that the p MAR-CAG-FST-IRES-Ac GFP1-poly A-MAR(pMAR-FST) vector had higher capacity to form monoclonal transgenic cells than the vector without MAR,though transient transfection and integration efficiency were similar with either construct. Remarkably, protein expression in transgenic cells with the p MAR-FST vector was significantly higher than that from the bicistronic vector. Exogenous FST was expressed in all of the p MARFST transgenic mice at F_0, F_1 and F_2. Total muscle growth in F_0 mice was significantly greater than in wild-type mice,with larger muscles in fore and hind limbs of transgenic mice. p MAR-FST transgenic mice were also found with more evenly distributed muscle bundles and thinner spaces between sarcolemma, which suggests a correlation between transgene expression-associated muscle development and the trend of muscle growth. In conclusion, a p MAR-FST vector, which excluded the resistant genes and frame structure, enhances and stabilizes FST gene expressions in both transfected cells and transgenic mice. | Xiaoming HU Jing GUO Chunling BAI Zhuying WEI Li GAO Tingmao HU Shorgan BOU Guangpeng LI | 2016 | Frontiers of Agricultural Science and Engineering2016，3，1： | 1 |
| 10 | Production of cloned transgenic cow expressing omega-3 fatty acids显示文摘 | Xia Wu Hongsheng Ouyang Biao Duan Daxin Pang Li Zhang Ting Yuan Lian Xue Daibang Ni Lei Cheng Shuhua Dong Zhuying Wei Lin Li Ming Yu Qing-Yuan Sun Da-Yuan Chen Liangxue Lai Yifan Dai Guang-Peng Li | 2012 | Transgenic Research2012，，3： | 1 |
| 11 | Effects of 1,25-(OH)_2D_3 on Stimulation of Osteoclast-like Cells Formationand Expression of ODF mRNA in Murine Marrow Cells in Vitro显示文摘目的 :观察不同浓度的 1,2 5 - (OH) 2 D3 对破骨细胞形成及对骨髓细胞ODFmRNA表达的影响。进一步阐明骨吸收刺激因子在正畸牙周组织改建中的作用。方法 :应用不同浓度的 1,2 5 - (OH) 2 D3 (0、10 -10 、10 -8、10 -6mol/L)诱导大鼠骨髓细胞破骨样细胞的形成 ,采用体外破骨细胞溶骨模型 ,观察牙本质片上骨吸收陷窝数目 ,采用原位杂交技术检测骨髓基质细胞ODF的mRNA表达。结果 :随着 1,2 5 - (OH) 2 D3 浓度的增加 ,骨陷窝数明显增多 ,陷窝面积增大 ;ODFmRNA表达的阳性信号显著增强。结论 :在体外 ,1,2 5 - (OH) 2 D3 可以调节破骨细胞的骨吸收活性 。 | WANG Feng LIN Zhui LI Yong-ruing YU ANLu | 2004 | 口腔医学研究2004，20，4： | 1 |
| 12 | In vivo and in vitro development of Tibetan antelope(Pantholops hodgsonii)interspecific cloned embryos显示文摘The Tibetan antelope is endemic to the Tibetan Plateau,China,and is now considered an endangered species.As a possible rescue strategy,the development of embryos constructed by interspecies somatic cell nuclear transfer(iSCNT)was examined.Tibetan antelope fibroblast cells were transferred into enucleated bovine,ovine and caprine oocytes.These cloned embryos were then cultured in vitro or in the oviducts of intermediate animals.Less than 0.5%of the reconstructed antelope-bovine embryos cultured in vitro developed to the blastocyst stage.However,when the cloned antelope-bovine embryos were transferred to caprine oviducts,about 1.6%of the embryos developed to the blastocyst stage.In contrast,only 0.7%of the antelope-ovine embryos developed to the morula stage and none developed to blastocysts in ovine oviducts.The treatment of donor cells and bovine oocytes with trichostatin A did not improve the embryo development even when cultured in the oviducts of ovine and caprine.When the antelope-bovine embryos,constructed from oocytes treated with roscovitine or trichostatin A,were cultured in rabbit oviducts 2.3%and 14.3%developed to blastocysts,respectively.It is concluded that although some success was achieved with the protocols used,interspecies cloning of Tibetan antelope presents difficulties still to be overcome.The mechanisms resulting in the low embryo development need investigation and progress might require a deeper understanding of cellular reprogramming. | Guanghua SU Lei CHENG Yu GAO Kun LIU Zhuying WEI Chunling BAI Fengxia YIN Li GAO Guangpeng LI Shorgan BOU | 2014 | Frontiers of Agricultural Science and Engineering2014，1，1： | 1 |
| 13 | Magnetospheric Physics in China: 2002-2004显示文摘This brief report presents the latest advances of the magnetospheric physics researches in China during the period of 2002-2004. The progress of the magnetospheric space mission DSP is given in another dedicated paper of this issue. | CAO Jinbin LIU Zhenxing LI Lei PU Zhuying | 2004 | 空间科学学报2004，24，z1： | 1 |
| 14 | GsZFPl,a new Cys2/His2-type zinc-finger protein,is a posi-tive regulator of plant tolerance to cold and drought stress显示文摘 | LUO X BAI X ZHU D LI Y JI W CAI H WU J LIU B1 ZHUY | 2012 | Planta2012，235，6： | 1 |
| 15 | Removal of superior wheat kernels promotes filling of inferior kernels by changing carbohydrate metabolism and sink strength显示文摘Poor filling and low weight of inferior kernels limit the further improvement of wheat yield. Two cultivars, Shuangda 1 and Xinong 538, with different grain weights, were selected to investigate the physiological changes of inferior kernels by removal of superior kernels(RS) at the flowering stage. i TRAQ combined with physiological indexes was used to identify factors limiting the filling of inferior kernels.Removal of superior kernels significantly increased the mean filling rate of inferior kernels and thus increased their weight. A set of 6012 proteins in inferior wheat kernels were differentially expressed between the RS and control. These differentially expressed proteins were involved mainly in carbon metabolism and energy metabolism. The main reason for the promoting effect of RS on the filling of inferior kernels may be that RS downregulated proteins involved in glycolysis and pyruvate metabolism while upregulating proteins involved in carbon fixation and photosynthesis. Consequently, RS greatly increased the ATP content in inferior kernels, supplying energy for them to absorb photosynthetic assimilates. Removal of superior kernels increased the activities of sucrose synthase, soluble starch synthase,adenosine diphosphate glucose pyrophosphorylase, and starch branching enzyme in inferior kernels and promoted starch accumulation in them. Thus, RS promoted the filling of inferior kernels and increased their weight. The promoting effect of RS on starch synthesis in inferior kernels was associated with their endogenous IAA and ABA levels. | Jian Luo Zhui Li Fei Mo Yuncheng Liao Yang Liu | 2021 | The Crop Journal2021，9，6： | 1 |
| 16 | Parenteral Nutrition Support in China and Its Modern Trends显示文摘Parenteral mutrition support (PN)is one of the most important achievements in surgical science and practice of the last 40 years.From 1971,clinical applications of PN have spread from Beijing and Shanghai to Nanking,Tianjin,and to other big cities throughout the country.Over the past decade,clinical and laboratory research activities have also expanded from what once only a few medical colleges to encompass many medical centers. | Jiang ZM ,Li KW ,Wang XR,Zhang SY ,Yang NF,He KZ,Shu H ,Qi Y ,Chen TY ,ZhuY and Wu WRFrom Department of Surgery ,Peking Union Medical College Hospital,Beijing 100730,China. | 1993 | 中华临床营养杂志1993，11，1： | 0 |
| 17 | 组蛋白脱甲基酶LSD1通过抑制Wnt信号传导促进脂肪细胞分化显示文摘脂肪组织对于动物的生理活动至关重要。白色脂肪的主要作用是储存能量,而棕色脂肪通过UCP1-介导的能量消耗过程调控非颤抖性产热。虽然我们对表观遗传学机制在多种分化过程中的调节作用有所认识,但对于棕色脂肪细胞分化的表观遗传调控了解甚少。 | Yan Chen Jeesun Kim Ruipeng Zhang Xiaoqin Yang Yong Zhang Jianwu Fang Zhui Chen Lin Teng Xiaowei Chen Hui Ge Peter Atadja En Li Taiping Chen 戚炜 | 2017 | 科学新闻2017，19，4： | 0 |
| 18 | Quality of life and influencing factors between local and itinerant populations during the COVID-19 pandemic显示文摘Objective:To determine the difference in quality of life and its influencing factors between local and itinerant populations in Nanjing during COVID-19.Methods:The quality of life questionnaire,which was based on the Brief Scale of WHO Quality of Life and redesigned by the research group,was used to randomly investigate 1150 people in 5 districts of Nanjing.Results:A total of 1112 valid questionnaires were collected(local population,n=558;itinerant population,n=554).The quality of life of the itinerant population was significantly lower than the local population.The itinerant population scores in physiology,psychology,social relationships,and environment were lower than the local population(all P values<0.05).COVID-19 had a greater impact on the itinerant population than on the local population,especially in medical assistance,enjoyment of life,and interpersonal relationships(all P values<0.05).Conclusion:The itinerant population had a lower quality of life than that of the local population during the prevention and control pandemic of COVID-19,thus more social support and help is warranted. | Han-Lu Cao Yi-Yang Cao Xie Wei Wen-Shu Zhao Yi Zhang Wen-Fei Kong Xiang-Ning Yang Wan-Xuan Li Ze-Han Yu Zhui Zhang Jing-Ning Zhao Xuan Han Cao Chen Ning Ding | 2022 | Psychosomatic Medicine Research2022，4，3： | 0 |
| 19 | Progress in the expression of P-glycoprotein in brain metastases of lung cancer andrelated TCM research显示文摘脑转移瘤是常见的颅内肿瘤,其发生不仅代表恶性程度高,往往也是治疗失败、预后差的主要因素.脑转移癌原发灶以肺癌最多.P-糖蛋白为ABC(ATPbindingcassette)转运蛋白超家族成员,与肺癌脑转移瘤的发生发展密切相关.并且是影响药物通过血脑屏障进入脑组织中的主要原因,也是影响脑转移瘤治疗的重要因素.传统中医将脑转移瘤的病机归结为痰、毒、瘀、虚等方面,治则以醒脑开窍、活血化瘀、化痰祛浊等为主.近年来,关于中药对P-糖蛋白影响的报道日渐增多,本文根据己有的国内外研究,归纳了相关中药及其成分对P-糖蛋白的影响及作用机制,以系统了解并指导该领域的研究,并为临床合理用药提供参考. | Shuai Zhui Ling-Yu Qi Xue Wang Hua-Yao Li Jia Li Jing Yang | 2018 | TMR Theory and Hypothesis2018，1，1： | 0 |
| 20 | The ecological adaptability of cloned sheep to free-grazing in the Tengger Desert of Inner Mongolia,China显示文摘Since the birth of the first cloned sheep,somatic cell nuclear transfer technology has been successfully used to clone a variety of mammals.Cloned livestock have no apparent health risks,and the quality and safety of the cloned animal products are similar to non-cloned animals.The social behavior and environmental adaptability of postnatal cloned animals,especially when used for grassland farm production purposes,is unknown.In the present study,the cloned Dorper sheep equipped with GPS location devices were free-grazed in a harsh natural environment similar to conditions commonly experienced by Mongolian sheep.The main findings of this research were as follows.(1)Under free-grazing conditions,the cloned sheep showed excellent climatic and ecological adaptability.In extreme temperature conditions ranging from–30 to 40°C,the cloned sheep maintained acceptable body condition and behaved as other sheep.(2)The cloned sheep quickly adapted from a herd feeding strategy to the harsh environment and quickly exhibited a grazing regimen as other free-grazing sheep.(3)The cloned sheep exhibited free-grazing patterns and social behavior as other sheep.(4)The cloned sheep in the harsh environment thrived and produced healthy lambs.Overall,the cloned Dorper sheep exhibited excellent ecological adaptation,which is an important consideration for breeding meat sheep by cloning.The Dorper sheep readily adapted to the free-grazing conditions on the Mongolian plateau grassland,which attests to their ability to withstand harsh environmental conditions. | Xinxin LI Huijuan WANG Guanghua SU Zhuying WEI Chunling BAI Wuni-MENGHE Yanhui HOU Changqing YU Shorgan BOU Guangpeng LI | 2014 | Frontiers of Agricultural Science and Engineering2014，1，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员