A comparison of polymerase chain reaction with and without RNA extraction and virus isolation for detection of bovine viral diarrhea virus in young calves.     

D Deregt  P S Carman  R M Clark  K M Burton  W O Olson  S A Gilbert 《Journal of veterinary diagnostic investigation》2002,14(5):433-437

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利木赞牛改良互助本地黄牛的效果   总被引：1，自引：1，他引：0  

李寿林 《中国牛业科学》2006,33(3):13-14

为了研究利木赞牛对互助黄牛的改良效果,本试验测定了初生、6月龄和1岁利本F1代的体尺、体重,并与本地黄牛进行了比较。结果表明,利本F1代牛的各项被检指标均比本地黄牛有明显的提高(P<0.01)。  相似文献   

Influence of rootstock on the susceptibility of sweet cherry scions to bacterial canker, caused by Pseudomonas syringae pvs morsprunorum and syringae     

CONSTANCE M. E. GARRETT 《Plant pathology》1986,35(1):114-119

In a field trial to determine whether the rootstock influenced the susceptibility of cherry cultivars to bacterial canker three cultivars (Napoleon, Roundel and JI 14039), each grafted on two rootstocks (F 12/1 and Colt), were subjected to natural infectionand to inoculation with three bacterial canker pathogens (Pseudomonas syringae pv. morsprunorum races 1 and 2 and P. syringae pv. syringae). Inoculations were made through leaf scars and through wounds. The high susceptibility of Napoleon and high resistance of JI 14039 were confirmed. Napoleon was more susceptible to inoculation through branches when on F12/1 than when on Colt but the reverse was true for leaf scar inoculations. JI14039 was more susceptible to race 1 inoculated through leaf scars when grown on F12/1 than when on Colt. No rootstock/scion interaction was detected with Roundel.
The complexity of the relationships between the pseudomonad pathogens and their cherry hosts is briefly discussed.  相似文献   

Reproductive emergencies.     

L Ari Jutkowitz 《Veterinary Clinics of North America: Small Animal Practice》2005,35(2):397-420, vii

The emergency clinician is frequently called on to manage problems relating to the female reproductive tract. Because owners sel-dom have the medical knowledge needed to differentiate normal from abnormal reproductive behaviors, they frequently look to the emergency veterinarian for guidance and information during and after parturition. For this reason, it is essential that the veterinarian have a good understanding of the normal reproductive cycle as well as the common emergencies that may occur. This article reviews the events surrounding normal parturition in the dog and cat and the reproductive emergencies seen most commonly in practice.  相似文献   

添加物对精子体外获能的影响及其分子机制     

李东全罗光彬  张晓华袁水桥 朱增娟 《现代畜牧兽医》2005,(10):20-22

获能是哺乳动物精子的成熟过程和受精的必要前提,获能液中添加物从不同方面影响精子获能;本文阐述了肝素、Ca2 载体A23187、葡萄糖、孕酮、咖啡因等添加物对精子体外获能的影响及其作用机制。  相似文献   

论会计谨慎性原则在茶业企业资产管理中的应用     

刘丽英 《茶叶科学技术》2005,(2):8-9

随着我国成为WT0成员国,茶叶出口政策的调整和我国经济市场化程度日益提高,茶业企业面临各种不确定因素急剧增加,作为会计第一基础要素的资产所受到的冲击更加显著,只有充分估计各种风险和损失,进行合理的资产确认、计量,才能保证财务信息的真实、可靠,避免出现因夸大或缩小资产可能发生的风险造成错误决策,确保茶业企业可持续发展.  相似文献   

Solar elastosis associated with neoplasia in two dalmations     

D P Knowles  A M Hargis 《Veterinary pathology》1986,23(4):512-514

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Light and electron microscopy studies of the developmental cycle and effect of pentamidine on the morphology of intra-erythrocyte stages of Babesia microti     

H Mehlhorn  W Raether  E Schein  M Weber  M Uphoff 《DTW. Deutsche tier?rztliche Wochenschrift》1986,93(9):400-405

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Effect of various plant factors on the expression of creeping-rootedness in lucerne (Medicago sativa L. complex)     

L. Pecetti  E. Piano  M. Romani 《Euphytica》2004,135(1):89-97

Although agronomically interesting, selection of creeping-rootedness inlucerne, that is, the ability to form adventitious shoots on horizontal,spreading roots, remains difficult because of the complex and still unclear geneticcontrol of this character, coupled with the possible occurrence of external factorsthat affect unpredictably its expression. Two experiments were undertaken onprogenies of creeping-rooted plants, to verify previous findings and inferences,and test novel hypotheses, concerning the effect of various plant factors on theexpression of creeping-rootedness. The ultimate aim was to provide information onthe most appropriate germplasm, procedures, or indirect selection criteria, that wouldimprove the efficiency of breeding for this character. The factors here examinedincluded genotype, age, kind of progeny, vigour, spreading ability, and undergroundmorphology. Some genotypes appeared to be good donors of the character, whereasothers did not. The proportion of creeping-rooted plants increased in allcases with the plant age. Selfing consistently depressed the expression ofthe character compared with clonal propagation or crossing. It is suggestedthat the effect of age and selfing on the penetrance of creeping-rootedness ismediated through their effect on plant vigour. Both aerial and root vigour showedindeed an effect per se on the presence of the character. Beside thevigour, possible indirect selection criteria were identified in the frequenciesof swollen zones and latent stem primordia on horizontal roots. Proportion ofcreeping-rooted plants in progenies after one year of growth appeared as a simple anduseful criterion to predict future trends. Consistent with previous conclusions, theresults provided evidence that a combination of family and individualselection may enhance the character expression.  相似文献   

迟熟杂交中稻新组合福优98-5     

李洪胜  王修文  卓宁敏  童孝年  谢瑞礼 《农业科技通讯》2005,(11):21-21

福优98—5是湖北清江种业有限责任公司利用福建省农科院稻麦研究所抗病不育系福伊A与选育恢复系98—5配组选育而成。2005年通过湖北省农作物品种审定委员会审定．品种审定编号为鄂审稻2005013。  相似文献