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1.
青海细毛羊生化遗传多态性的研究   总被引:7,自引:0,他引:7  
采用聚丙烯酰胺凝胶电泳和火焰光度法对509只青海细毛羊细血液和乳汁中HB,EP-1,EP-2,KE,TF,AMY1,AMY2,ES,ALP,RBC-LDH,Hpα-LA和β-LG总共13个位点的多态性进行了研究。结果为:(1)在青海细毛羊的HB,KE,TF,AMY2,ES,ALP,RBC-LDH1,Hp,β-LG总共9个位点上发现多态性,多态性位点的比例为69.23%;(2)每个位点实有的平均等位  相似文献   

2.
参照澳大利亚鸡传染性法氏囊病病毒( I B D V)00273 毒株基因组序列设计的 1 对引物,位于 V P2 高可变区两端,通过 R T P C R,扩增了 5 个 I B D V 山东分离株 V P2 基因的 607~1 080 位核苷酸片段(aa203~306)。 P C R 产物经纯化后,分别用 Dra Ⅰ、 Sac Ⅰ、 Ssp Ⅰ、 Pst Ⅰ和 Sau3 A I共 5 种限制性内切酶( R E)进行消化处理,结果 5 个分离株均为 Dra Ⅰ(- )、 Sac Ⅰ(- )和 Sau 3 A I(+ ), L C2 和 T A 株为 Ssp Ⅰ(+ ), L C1 和 J N 株为 Ssp Ⅰ(- ), L C1 和 L C2 株为 Pst Ⅰ(+ ), J N、 L L 和 T A 株为 Pst Ⅰ(- );5 个分离株的酶切图谱与美国变异株迥异,而 T A 株与日本超强毒株 9011 相类似。5 个分离株与现用疫苗株对比,至少在 V P2 可变区内存在着一定的差异,这可能是 I B D V 接种免疫鸡群仍然暴发 I B D 的原因之一。  相似文献   

3.
比较了 1~3 月龄( n = 15)和 4~6 月龄( n = 15)鸵鸟血液的 38 项生化参数。结果,1~3 月龄和 4~6 月龄鸵鸟之间血清 C K、 T G、 B U N、 B U N/ C R E、 U A、 M g、 P含量差异极显著( P < 001);血清 T B A、 L D L C、 C H O、 T T T、 Na、 K 含量的组间差异显著( P < 005);其他指标 2 组间差异不显著。该结果提示,不同月龄鸵鸟的营养物质代谢过程存在一定差异。  相似文献   

4.
甜菜碱代替部分蛋氨酸对肉仔鸡生产性能和胴体品质影响的研究EFFECTOFSUBSTITUTIONOFBETAINGFORSOMEPARTOFMETHIONINGONPERFORMANCEANDCARCASSQUALITYOFBROILERSDengY...  相似文献   

5.
不同生理时期不同水平大豆抗营养因子对生长蛋鸡器官重的影响EFFECTSOFTHEDIETSCONTAININGVARINGLEVELSOFRAWSOYBEANONORGANWEIGHTSOFPULLETSDURINGDIFFERENTGROWINGP...  相似文献   

6.
从中国发病鸡群中分离的鸡减蛋综合征病毒(EDSV)AA-2株,经常规方法提取其病毒核酸后,构建了限制性内切酶PstⅠ及HindⅢ水解片段的基因文库。对其中HindⅢ-F片段(52.9~58.9mu)的正反2条链的序列测定发现,其反链存在1个编码容量为387个氨基酸(aa)的开放读码框架(openreadingframe,ORF),经Genebank/EMBL同源搜寻后证实其编码产物为EDSV的DNA结合蛋白(DBP)。与其他腺病毒DBP的氨基酸序列进行同源比较,其N端同源性在19.0%~46.2%之间,C端同源性在27.7%~60.4%之间。腺病毒DBP的3个保守序列CR1,CR2,CR3在EDSVDBP中有较大变化,但EDSVDBP的锌指框架(Zn2+fingermotif)却保留了对其功能必需的残基。  相似文献   

7.
仔猪断奶应激对血液和生化的影响   总被引:13,自引:0,他引:13  
随机选取 10 头健康的42~45 天断奶长白仔猪,分别于断奶时、断奶后7 天、14 天上午采血,检验血液学、血清生化等多项指标,结果如下:仔猪血清 A S T、 C K、 L D H 活性在断奶后 7 天时都升高,其中 A S T、 L D H活性与断奶时相比差异极显著( P< 001);血清 A M Y L 活性,断奶后均比断奶时高,但无统计学上差异( P>005);血清 T P、 G L O B、 A L B、 B U N、 C H O L 含量在断奶后极显著或显著降低( P< 001 或 P< 005); G L U、 C R E A、 T C O2 含量降低,但无统计学上差异( P> 005)。血液 R B C、 H G B、 H C T、 M C V 断奶后极显著降低( P<001), M C H C 断奶后极显著升高( P< 001); W B C、 P L T 等断奶后虽有变化,但均无统计学上差异( P>005)。结果表明,仔猪在断奶后一段时间,处于营养缺乏性单纯小红细胞性贫血状态。  相似文献   

8.
应用间接免疫荧光法检测鸡传染性贫血病病毒抗体的研究   总被引:4,自引:0,他引:4  
用鸡传染性贫血病病毒(CIAV)MSBI-TK5803毒株感染的MDCC-MSB;细胞涂片为抗原,建立了检测CIAV抗体的间接免疫荧光法(IIFA)。应用该IIFA方法对人工感染的SPF鸡进行了检测15只1日龄SPF鸡在接种后第7、14天时均呈阴性反应;21天时2只鸡呈弱阳性反应,28天时均呈弱阳性反应,21天时2只鸡呈弱阳性反应,28天时均呈弱阳性反应,35天时呈明显阳性反应;14只40日龄SP  相似文献   

9.
采用超速离心、热变性处理、硫酸铵沉淀和亲和层析方法,从鸡肝脏中分离提纯了β-羟-β-甲戊二酸单酰辅酶A(HMG-CoA)还原酶。提纯倍数为209倍,比活力188.5U/mg,Km值1.8×10-4mol/L。SDS-PAGE测得分子量为3.2×104。温度对该酶活性影响较大,37℃时活性最高。最适反应pH为7.2。甘氨酸在10mmol/L浓度以上时对该酶呈现明显抑制作用,l-组氨酸、l-精氨酸则无明显抑制作用。Zn2+、Mg2+、Cu2+离子对该酶有明显抑制作用,Zn2+在1.5mmol/L、Cu2+和Mg2+在2.0mmol/L浓度以上时抑制作用明显。中药山楂(CHS)和决明子(CHZ)的水煎液对酶的抑制作用明显  相似文献   

10.
应用HI、AGP、PAT等方法,对毕节地区9种鸡疫病感染情况进行调查,结果阳性率ND52.54%,CRD45.95%,SP43.52%,FC31.05%,MD23.12%,ILT0.47%,AL、AI、IB均为0。CRD、MD、ILT在我区历史上从未记载,属首次发现。  相似文献   

11.
In experiments to investigate the time taken by pigs to negotiate ramps with different slopes it was found that they ascended with greater facility than they descended. Between 0 degrees and 20 degrees, the slope appeared to have little effect on the time taken to ascend or descend. Above 20 degrees the time taken to ascend increased linearly. The relationship between the time taken to descend and the slope above 20 degrees was biphasic with times increasing substantially above 35 degrees. There were also differences between the times taken on different days but no evidence of habituation. Pigs took longer to climb steeper ramps with wider spaces between cleats but there was no significant effect on the time taken to descend.  相似文献   

12.
试验选择客土回填后的山地荒沟,在已建植的雀麦属禾草草地设置试验区,连续2年研究禾草种植对客土理化性质的影响,结果得出:自然条件下,春季播种雀麦属禾草,可以加速山区荒沟植被恢复,改善客土理化性质,播种后2年,地上生物量可达3018.0kg/hm^2,0~10cm土层中pH值明显降低,全氮、碱解氮含量显著提高,达0.562g/kg和30.89mg/kg;播种后3年,植株密度与草地覆盖度达到最大,0~10cm土层土壤容重显著减小,达1.282g/cm^3,总孔隙度显著增加,0~25cm土层土壤紧实度明显降低,同时,0~10cm土层速效磷含量下降速度相对减缓,土壤有机质、速效钾含量显著提高,达到9.603g/kg和189.20mg/kg。  相似文献   

13.
该试验旨在观察新研制的中药制剂百呼清药效。试验将人工感染鸡毒支原体的15日龄肉鸡,按常规方法随机分为6组,每组每天给2次,连续5d,停药后继续观察10d。结果给组增重显著或极显著高于感染对照组(P<0.05 或 P<0.01),但与健康组比较差异不显著(P>0.05);给药组均能明显降低抗体阳性鸡毒支原体感染疗效显著,其作用优于或相当于泰乐菌素。  相似文献   

14.
Groups of white leghorn hens were vaccinated twice with a Mycoplasma gallisepticum (MG) bacterin, once with bacterin, or left unvaccinated. Four weeks after vaccination, they were challenged with virulent R strain MG. Egg production was significantly higher in challenged vaccinated groups than in the challenged control group. Four challenged control hens went out of production, whereas only one twice-vaccinated hen did. MG was first isolated directly from eggs 5 days postchallenge (PC) in twice-vaccinated hens, 4 days PC in once-vaccinated hens, and 2 days PC in controls, and the hens continued to lay positive eggs till the end of the experiment 7 weeks PC. MG was found in 17.65%, 38.55%, and 45.90% of eggs cultured in twice-vaccinated, once-vaccinated, and control groups, respectively. Nine of 16 twice-vaccinated hens were found to be shedding MG through their eggs, whereas 15 of 17 once-vaccinated hens and 14 of 16 controls were shedding MG through their eggs.  相似文献   

15.
本研究旨在探明4个时间段褐黄血蜱(采自刺猬体表)中肠蛋白质成分,揭示参与血餐消化的蛋白种类及其含量变化规律。采用液相色谱-串联质谱法(LC-MS/MS)对采集于刺猬体表的4个时间段褐黄血蜱的中肠蛋白组成分进行检测。基于该蜱的唾液、中肠转录组翻译文库及Uniprot数据库,利用软件Mascot 2.2对所获肽段及蛋白质进行鉴定。结果显示:在褐黄血蜱中肠蛋白提取液中共检测出特异性肽段3 046条,鉴定303种蛋白,其中271种为高可信蛋白;在所有的高可信蛋白中,23种含量较为丰富,125种在后期消化阶段(第2至第4阶段)的含量为0,123种的含量发生不同程度的变化(24种蛋白的含量变化明显,其中12种含量上升明显,12种含量下降明显)。确定148种高可信蛋白来自于刺猬血清,推断24种可信蛋白可能参与蜱虫对血餐的消化。  相似文献   

16.
Fourteen horses and one pony, 1 to 16 years of age, were castrated with a technique designed to promote primary healing and ablation of the scrotum following removal of descended testicles. Twenty-six testicles (10 nondescended, 15 normal descended testicles, and 1 neoplastic descended testicle) were removed. Nondescended testicles were removed through a skin incision over the external inguinal ring. Descended testicles were removed, and the scrotum was ablated by excision of the ventral scrotum. All testicles were removed by emasculation. The common vaginal tunic was not opened prior to emasculation of the descended testicles, and transfixation liqation sutures were used in only two horses. All incisions were closed with multiple layers of synthetic absorbable sutures in the subcutaneous and subcuticular tissues. All incisions healed by primary intention, and 14 recovered without complications. As a result of incomplete scrotal ablation, one horse had temporary lameness and swelling of the scrotal area that resembled the presurgical appearance.  相似文献   

17.
为了解不同放牧利用强度对荒漠草原土壤水分含量的影响,采用随机区组设计,研究轻度(LG)、中度(MG)、重度(HG)放牧对短花针茅荒漠草原土壤水分含量的影响。不同放牧强度的载畜率分别为O.93(LG)、1.82(MG)、2.71(HG)sheep/(hm^2half year),放牧羊只数分别为4、8、12只,放牧期为6个月/年。采用对应分析法比较不同放牧强度下近地表层0~10cm、10~20cm、20~30cm土壤的水分含量。结果表明,不同放牧梯度条件下,土壤含水量总体变化规律为LG〉CK〉MG〉HG.不同土层土壤含水量总体变化规律为0~10cm〉20-30cm〉10-20cm。各放牧强度对总特征值贡献率大小趋势为CK〉MG〉HG〉LG。随着放牧强度的增加,土壤含水量差异明显且呈梯度下降趋势。0-10cm土层土壤含水量受放牧强度的影响最大,其次为10~20cm和20~30cm土层.  相似文献   

18.
Lam KM 《Avian diseases》2004,48(3):488-493
Mycoplasma gallisepticum (MG) was used to expose chicken peripheral blood lymphocytes (PBLs), red blood cells (RBCs), heterophils, and chicken tumor cells (MSB-1 and HD-11 cells). Incubation of PBLs with MG for 3 hr resulted in extensive clumping of lymphocytes. Incubation of the MSB-1 cells with MG also caused clumping of the cells, with many of the cells showing perforations and others showing capping of the surface projections. Incubation of RBCs with MG resulted in an altered cell surface morphology, a decrease in cell size, and perforation. There were no discernible changes on the surface of the heterophils and the HD-11 cells. However, the HD-11 cells appeared to have a decreased ability to attach to the surface of the plastic and to have a decreased ability to respond to chemoattractant fMLP after 24 hr of incubation. These results suggest that, under the conditions used, MG caused certain damage to peripheral blood cells and a significant decrease in chemotactic response in the HD-11 cells.  相似文献   

19.
试验以2株乳杆菌MG2 1、L casei zhang按不同剂量分别饲喂小鼠,在5,10,15,20,25,30天测定其血清中IgG及肠道内SIgA含量。结果表明:饲喂不同剂量2株菌的乳悬液均能极显著地提高IgG、SIgA的含量(P<0.01)。在提高IgG含量方面,2菌株均表现出低、中剂量饲喂组随着饲喂时间的不断增加,有超过高剂量组的趋势。在第25天时,菌株MG2 1中剂量组极显著地高于高剂量组;L casei zhang低剂量组极显著地高于中、高剂量组。而SIgA高剂量组比低、中剂量组高。  相似文献   

20.
饲喂乳酸菌对小白鼠血清中IgG及肠道中SIgA影响的研究   总被引:4,自引:0,他引:4  
本试验以2株乳杆菌MG2-1、L.casei.zhang按不同剂量分别饲喂小鼠,在5、10、15、20、25、30d测定其血清中IgG及肠道内SIgA含量,结果表明饲喂不同剂量的2株菌的乳悬液均能极显著提高IgG、SIgA含量(P<0.01)。对提高IgG含量方面两菌株均表现出低、中剂量饲喂组随着饲喂时间不断增加,有超过高剂量组的趋势。在第25d时,菌株MG2-1组,中剂量组极显著的高于高剂量组,L.casei.zhang组低剂量极显著的高于中、高剂量组。而SIgA水平高剂量组比低、中剂量组高。  相似文献   

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