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1.
绿脓杆菌外毒素A recA基因的融合及融合蛋白的表达 总被引：1，自引：0，他引：1
将绿脓杆菌ｒｅｃＡ基因克隆到ｐＵＣ１８中，构建了中间载体ｐＵＣＲ１８；然后以正确的向位及阅读框架将ｒｅｃＡ基因亚克隆到毒性基因缺失的绿脓杆菌外毒素Ａ（ＰＥＡ）基因中，构建了ＰＥＡ－ｒｅｃＡ融合基因质粒ｐＥＲＡ；融合基因经ＢａｍＨＩ及ＥｃｏＲＩ酶切，以正确阅读框架插入带有Ｔ７表达启动子的质粒ｐＥＴ－１７ｂ，构建了可表达ＰＥＡ－ｒｅｃＡ融合基因的质粒ｐＥＲＡ－１７ｂ。经酶切分析及ＰＣＲ扩增检测证明，绿脓杆菌ｒｅｃＡ已插入ＰＥＡ毒性基因中。ｐＥＲＡ－１７ｂ转化到ＤＥ３溶原态大肠杆菌ＨＭＳ１７４中，经ＩＰＴＧ诱导，表达了ＰＥＡ－ＲｅｃＡ蛋白。ＳＤＳ－ＰＡＧＥ和凝胶薄层扫描ＰＥＡ－ＲｅｃＡ蛋白，表明ＰＥＡ－ＲｅｃＡ的分子量约为９００００，与理论推算相符，表达率占菌体总蛋白量３．４２９％，用ＰＥＡ抗血清和抗ＲｅｃＡ单克隆抗体作免疫印迹分析，ＰＥＡ－ＲｅｃＡ与它们都有免疫学反应 相似文献
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红霉素与青链霉素治疗绵羊恶性腐蹄病的效果比较ＷＥＢＢＷＡＲＥＪＫＳＣＲＩＶＥＮＥＲＣＪＶＩＺＡＲＤＡＬ恶性腐蹄病是由Ｄｉｃｈｅｌｏｂａｃｔｅｒｎｏｄｏｓｕｓ菌株引起的、使绵羊逐渐衰弱的一种疾病，以迅速沿蹄角质下漫延为特征。该病在澳大利亚多雨地区和其它... 相似文献
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蓝舌病病毒单克隆抗体的制备及生物学特性鉴定 总被引：7，自引：0，他引：7
以纯化的蓝舌病病毒（ＢＴＶ）１１型ＶＰ７免疫ＢＡＬＢ／ｃ小鼠,动用淋巴细胞杂交瘤技术,借助间接ＥＬＩＳＡ筛选,获得了３株分泌抗ＢＴＶ１１ ＶＰ７的群特异性单克隆抗体（ＭｃＡｂ）的杂交瘤细胞株,命名为Ｃ１２Ｄ９、Ｂ４Ｆ３、Ｅ１Ａ７。这３株杂交瘤细胞株连续传代３个月再经液氮冻存６个月后复苏培养,仍能稳定分泌特异性ＭｃＡｂ。３株ＭｃＡｂ均具有ＥＬＩＳＡ特性和免疫沉淀特性,其中Ｃ１２Ｄ９株上清液的ＥＬＩＳ 相似文献
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有丝分裂原对离体boPBMC增殖和分泌Ig的作用 总被引：2，自引：1，他引：1
应用＾３Ｈ－ＴｄＲ掺入法，ＥＬＩＳＡ和ＦＡＣＳ研究了离体奶牛外周血单核细胞（ｂｐＰＢＭＣ）对有丝分裂原的免疫应答。ＰＷＭ和ＣｏｎＡ能不同程度地诱导ｂｏＰＢＭＣ增殖和分泌Ｉｇ；而ＳＥＢ只能使ｂｏＰＢＭＣ高度增殖而不分泌Ｉｇ（Ｐ〉０．０５）。ＰＷＭ诱导的ｂｏＰＢＭＣ经１２ｄ培养，其中ＣＤ４＋／ＣＤ８＋细胞的比率为２．９：１；而ＳＥＢ诱导的细胞为０．３：１。离体ｂｏＰＢＭＣ主要分泌ＩｇＭ和ＩｇＧ１，只有 相似文献
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用ＳＰ２／０骨髓瘤细胞与以羊源细粒棘球蚴原头节可溶性抗原免疫的Ｂａｌｌ／ｃ鼠脾细胞融合，经克隆和筛选后获得８株分泌抗ＳＰＡ的杂交瘤细胞株，即３Ａ４，１ＩＣ２，２Ｂ３，２Ｃ２，２Ｅ３，３Ｅ６，３Ｆ１０和２Ｃ２。亚类鉴定为ＩｇＧ１（３Ａ４，３Ｅ６，１Ｃ２，３Ｆ１０和３Ｃ２），ＩｇＧ２ｂ（２Ｃ２），ＩｇＧ３（２Ｅ３），ＩｇＧ总（２Ｂ３）。免疫双扩散法显示２Ｃ２腹水及２Ｂ３，２Ｃ２，２Ｅ３培养上清粗提物与 相似文献
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以纯化的兔出血症病毒免疫ＢＡＬＢ／Ｃ鼠，应用杂交瘤技术获得了分泌抗ＲＨＤＶ单抗杂交瘤细胞１７株，其中有３株杂交瘤细胞分泌单抗的ＥＬＩＳＡ效价为１：４０９６００，１：４０９６；５株单抗具有血凝抑制活性。兔抗ＲＨＤＶ高兔血清对１７株ＭｃＡｂ的ＥＬＩＳＡ抑株为ＩｇＧ２ｂ。各株ＭｃＡｂ与欧洲棕色兔病病毒无抗原交叉反应，也无沉淀反应特性。 相似文献
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采用腹腔的接种１次脾内注射禽呼肠孤病毒（ＡＲＶ）蛋白免疫小鼠，经３次融合后，共筛选８株分泌抗禽呼肠孤病毒（单克隆抗体杂交瘤细胞株，这８株ＭｃＡｂ均可与ＡＲＶＳ１１３３株，ＦＤＯ株发生反应，而与ＩＢＤＶ，ＭＤＶ，ＥＤＳ－７６病毒不发生反应，经亚类鉴定，ＡＥ７，ＡＦ８，ＢＤ１，ＤＨ１０，ＥＥ５为ＩｇＧ１；ＡＤ６，ＣＧ４为ＩｇＣ２ａ，ＡＧ７为ＩｇＧ２ｂ。腹水效价在１０＾３～１０＾５之间。 相似文献
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青海细毛羊血清运铁蛋白多态性的研究 总被引：8，自引：0，他引：8
采用聚丙烯酰胺凝胶电泳法对４０１只青海细毛羊的血清运铁蛋白多态性进行了研究。结果表明：①青海细毛羊血清运铁蛋白座位上有ＴＦＡ，ＴＦＧ，ＴＦＢ，ＴＦＣ，ＴＦＤ，ＴＦＭ，ＴＦＥ和ＴＦＱ８个等位基因，其中ＴＦＣ（０．３８７８）和ＴＦＡ（０．２４９４）为优势等位基因；②已发现ＴＦＡＡ，ＴＦＡＧ，ＴＦＡＢ，ＴＦＡＣ，ＴＦＡＤ，ＴＦＡＭ，ＴＦＡＥ，ＴＦＡＱ，ＴＦＧＧ，ＴＦＧＢ，ＴＦＧＣ，ＴＦＧＤ，ＴＦＢＢ，ＴＦＢＣ，ＴＦＢＤ，ＴＦＢＭ，ＴＦＣＣ，ＴＦＣＤ，ＴＦＣＭ，ＴＦＣＱ，ＴＦＤＤ，ＴＦＤＭ，ＴＦＤＥ２３种基因型，以ＴＦＡＣ（２０．９５％）的出现频率最高；③ＴＦ座位的基因杂合度为０．７３８１；④在公羊组和母羊组，ＴＦ基因型与体重、毛长和产毛量之间无显著性联系。 相似文献
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囊虫病循环抗原酶联免疫试剂检测盒的研制 总被引：7，自引：1，他引：6
以部分纯化囊虫抗原免疫 Ｂ Ａ Ｌ Ｂ／ｃ 小鼠,取其脾细胞与 Ｓ Ｐ２／０ 细胞融合制备抗囊虫循环抗原（ Ｃ Ａ） Ｍｃ Ａｂ ,共获得 ８ 株分泌抗囊虫 Ｃ Ａ Ｍ ｃ Ａｂ 细胞株。经鉴定,筛选出组合后能获得最佳检测效果的 Ｃ Ａ Ｍ ｃ Ａｂ细胞株 Ｍ ｃ Ａｂ １ Ｃ７（包被）和 Ｈ Ｒ Ｐ１ Ｂ５ 作为检测用的 Ｍ ｃ Ａｂ,用其建立了检测囊虫 Ｃ Ａ 的双抗体夹心 Ｅ Ｌ Ｉ Ｓ Ａ方法,并研制了囊虫病 Ｃ Ａ 检测试剂盒。试剂盒用于检测囊虫病 Ｃ Ａ,敏感、特异、快速、简便,囊虫病血清 Ｃ Ａ的检出率为 ９１．４３％ ,脑脊液 Ｃ Ａ 的检出率为 ９４．４４％ 。 相似文献
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A total of 2102 urine samples of 49 sows from three farms was collected. The relationship between creatinine or the urinary colour respectively and the urinary mineral concentration was investigated. A highly significant, negative correlation between the flow of urine (3.2 to 61.1 ml/min) and the creatinine concentration could be established (n = 330, r2 = 0.84). The correlation between the urinary colour and the flow of urine showed to be comparably close (r2 = 0.80). The urinary sodium, potassium, calcium, and phosphorus content was closely correlated with the creatinine concentration or the urinary colour respectively. The corrected mineral concentration (mmol/l:creatinine and/or mmol/l:urinary colour, E 405 nm) proved to be a useful parameter of the renal mineral excretion (mmol/min). It can be expected that the additional measurement of the two parameters creatinine and/or urinary colour may increase the indicative value of urine examination. In the three sow herds investigated the correlations between urinary colour and creatinine were higher than r2 = 0.85 in all cases. The relevance of the results with respect to urine examinations is discussed. 相似文献
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Coat colour inheritance in horses 总被引：1，自引：0，他引：1
The colours of the horses have long been a subject of interest to owners and breeders of horses as well as to scientists. Though, the colour of horses has little to do with its performance, it is a primary means of identification and also the first indicator of questionable parentage. Probably the ancestral colour of the horse was a black-based pattern that provided camouflage protection against predators. Horse colours are mostly controlled by genes at 12 different loci. The three basic colours of horses are black, bay and chestnut. The genetic control of the basic colours of horses resides at two genetic loci, namely Extension (E) and Agouti (A) loci. Among the basic colours bay is dominant to black and both are epistatic to chestnut. Dilution of basic colours of horses as a result of four colour dilution genes such as cream dilution, dun, silver dapple and champagne resulted in extensive array of possible colours of horses. The most widespread and familiar of the horse colour dilution gene is the one that produces the golden body colour and are called as palomino or buckskin based on the colour of the points. The grey coat colour is due to the presence of dominant gene (G) at the grey locus. Grey is epistatic to all coat colour genes except white and a grey horse must have at least one grey parent. Roan is due to a dominant gene (Rn) at roan locus and this combines with any base colour to produce the various shades of roan pattern. White coat is due to a single dominant gene (W) and it is epistatic to the genes controlling all other colours. White marking in the face and legs are due to genetic and non-genetic factors. Several genes are involved in producing white markings. During recent years, comparative genomics and whole genome scanning have been used to develop DNA tests for different variety of horse colours. Molecular genetic studies on coat colour in horses helped in identification of the genes and mutation responsible for coat colour variants. In future, this will be applied to breeding programmes to reduce the incidence of diseases and to increase the efficiency of race horse population. 相似文献
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苏丹草品种纯度鉴定技术的研究：胚芽鞘颜色及种子形态特征 总被引：8，自引：2，他引：6
根据我国审定登记的５个苏丹草品种的种子特征幼功胚芽鞘在温室３种不同营养液及田间条件下的颜色特征,探讨了苏丹草品种决策和纯度鉴定的方法。结果表明,供试苏丹草与蓁个品种在上述性状上均存在显著差异,极易区分;其余４个品种间可以由于千粒重进一步划分为２组。与高梁幼功胚芽鞘的颜色组成相似,苏丹草幼苗的胚芽鞘颜色也可以分为紫红色和绿色,并可作为品种真实性鉴定的特异性状。 相似文献
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通过野外采样对青藏高原东部高寒草甸4个海拔梯度间3种花色钝裂银莲花的繁殖性状和繁殖分配进行了研究。结果发现: 1) 3种花色钝裂银莲花对花和茎的投入比例均随着海拔的升高而增大,叶的投入比例均随着海拔的升高而减少。2) 3种花色钝裂银莲花的花数目均随着海拔升高而减少;单花面积和单花重均随着海拔升高极显著增大;花展示面积、繁殖投入和繁殖分配随着海拔升高而增大。3) 不同海拔梯度下,同花色钝裂银莲花其个体大小与花数目、单花重、花展示面积及繁殖投入均呈极显著正相关,与单花面积均呈显著正相关,且海拔直接对这些繁殖特征产生了影响;同一花色钝裂银莲花的个体大小与繁殖分配间均无固定模式。研究表明,海拔对不同花色钝裂银莲花的繁殖特征和繁殖分配有着重要的影响,且不同花色钝裂银莲花繁殖特征和繁殖分配对海拔的升高均做出了提高繁殖适合度的适应性调整,但海拔并不是影响钝裂银莲花繁殖策略的唯一因子。 相似文献
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1. Egg‐shell colour, egg specific gravity, shell thickness and egg weight were determined for 2080 eggs from three varieties of the Vasca, a Spanish brown‐egg‐laying hen. 2. Intermediate, positive and significant (P < 0·01) correlation coefficients were found between egg‐shell colour and specific gravity (0·25), or shell thickness (0·21). There was a very high (0·84), significant (P < 0·01) correlation between the measures of shell strength. 3. Shell thickness was accurately predicted with both specific gravity and egg weight as independent variables (determination coefficient 0·74); eggshell colour did not explain any further variation. 4. All traits showed considerable departure from normality in the form of negative kurtosis (shell colour and specific gravity), positive kurtosis (shell thickness and egg weight), negative skewness (shell thickness) or positive skewness (egg weight). 5. Egg‐shell colour, specific gravity and shell thickness were less in July, in old birds and in eggs laid in the morning. Differences in egg quality traits between the three varieties were not significant. 相似文献
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Palle Vistisen Rasmussen 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(1):12-18
Microspectrophotometric methods were used to provide objective correlates to the visually judged colour shade (CS) of the underfur in scanbrown mink pelts. The study included 21 scanbrown mink pelts (winter coat), representing a larger group of 87 mink pelts coming from a feeding trial with experimental and control animals. The pelts were visually graded from 1 (blue-greyish) to 5 (reddish), primarily in respect of the CS (in auction classification=clarity of colour) of the underfur seen on the edge of the pelt. Prepared samples of underfur fibres showed in visual inspection a gliding change of colour from paler to darker in a proximal-distal direction and were consequently examined at three levels above the skin surface. The means of the dominant wavelengths (hues) were 589.40, 588.00 and 586.70 nm, respectively, indicating that the variation between levels was small. Investigation of the small pelt material concerned showed that CS was significantly correlated with the measured lightness (L*) and with the yellow chromaticity coordinate (b*) of the underfur samples. In this investigation it was also shown that the underfur fibres with a visually blue-greyish colour shade were relatively dark and less yellow compared with underfur fibres with a reddish colour shade. However, data and the model estimating the colour shade demonstrated that, for the material concerned, visually very reddish underfur colour shades were not found in the lightest coloured pelts. 相似文献
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L.J. Royo I. Álvarez I. Fernández J.J. Arranz E. Gómez & F. Goyache 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2005,122(5):357-360
The aim of this study was to ascertain the role of the Agouti signaling peptide (ASIP) gene coding region in the Agouti locus variation within wild‐type coat colour in cattle. We determined the Extension genotype in 241 individuals from six Spanish and three French brown cattle breeds representative of wild‐type coat variation. Polymerase chain reaction–single‐strand conformation polymorphism (PCR‐SSCP) analysis was carried out in individuals of each Extension genotypes within the same breed in an attempt to identify variants in the three coding exons of the ASIP gene. No SSCP variants were found. Results were confirmed by sequencing the coding exons of the ASIP gene in 20 individuals. Our results suggest that the ASIP coding region does not play a central role in coat colour variation in cattle. 相似文献
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Abdellatif MA 《British poultry science》2001,42(3):327-332
1. The study was on a population of the Egyptian local strain Dandarawi. Hatching records were obtained from three lines over two generations (1996 and 1997). Sex ratios were calculated using a total of 5,822 1-d-old chicks. 2. Sex could be identified at hatch by down colour. Female chicks showed a black spot on the head or irregular strips on the back, whereas males had no marks on head and back. At 8 weeks of age, progeny could be easily sexed by feather colour, which was black and white for males and brown for females. The sexual dimorphism in feather colour at that age is due to the presence of the autosomal recessive wild type allele CO*N. Accuracy for autosexing at hatching time was 89-02% for males and 92-42% for females. 3. Sex ratio deviated significantly from the expected value, 1:1, in one line (line E) where the number of female chicks exceeded that of males, over the two generations. Chicks of both sexes exhibited the same survival rate up to 8 weeks of age. 相似文献
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Juraschko K Meyer-Lindenberg A Nolte I Distl O 《Veterinary journal (London, England : 1997)》2003,166(2):164-169
We have analysed the systematic influences, phenotypic colour markers and the additive genetic variation for congenital sensorineural deafness (CSD) in German Dalmatian dogs in order to help elucidate the importance of phenotypic breed characteristics for genetic differences of CSD. Linear animal models using restricted maximum likelihood methods were employed to estimate variance components. Data were obtained from all three German Dalmatian kennel clubs associated with the German Association for Dog Breeding and Husbandry (VDH). CSD was recorded by standardized protocols for brainstem auditory-evoked response (BAER). The material included 1899 German Dalmatian dogs from 354 litters in 169 different kennels. BAER testing results were from the years 1986 to 1999. Pedigree information was available for up to seven generations. The animal model regarded the fixed effects of sex, coat colour, eye colour, presence of patches, litter size, percentage of examined puppies per litter, kennel club, and inbreeding coefficient. The common environment of the litter and kennel as well as the additive genetic effect of the animal were taken into account as randomly distributed effects. The fixed effects of eye colour, percentage of puppies examined per litter and kennel club were significant in the mixed model analysis. A significant proportion of additive genetic variation could be shown despite corrections for phenotypic colour variants. The heritability estimate for CSD in German Dalmatian dogs was h(2)=0.27+/-0.07. The additive genetic correlation of CSD with presence of blue eyes was r(g)=0.53+/-0.41 and with presence of patches r(g)=-0.36+/-0.24. We concluded that additional genes other than those associated with phenotypic colour markers in German Dalmatian dogs significantly contribute to the occurrence of CSD. 相似文献