26 research outputs found

    条纹斑竹鲨IRF-1基因的克隆和特征分析

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    鱼类中IRF-1基因的克隆测序目前仅局限于辐鳍鱼类[1,2],而在软骨鱼类中未见报道。IRF-1是干扰素调节因子家族的成员之一[3]。除作为干扰素的转录调节因子外[4],还具有其他功能[5—10]。作为天然免疫重要的调节因子其基因在哺乳类中得到了广泛的克隆和分析。IRF-1与其他家族成员一样,在氨基末端前115个氨基酸都具较高同源性,具有色氨酸重复特征且包围在DNA绑定域周围

    短尾蝮蛇IRF-2基因的克隆和特征分析

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    报道了短尾蝮蛇Gloydius brevicaudus干扰素调节因子2基因(IRF-2)的克隆和cDNA全序列测定分析。目前除在爬行类外,IRF-2基因在大部分的脊椎动物如鱼类、两栖类、鸟类和哺乳类都有报道。为了获得爬行类IRF-2基因的全序列,从短尾蝮蛇的肾、脾、肝和肠4种组织中使用Trizol试剂盒提取了总RNA。从已知的IRF-2基因序列比对设计了简并引物来扩增保守片段。最后使用RACE方法得到IRF-2的cDNA全序列。结果显示短尾蝮蛇的IRF-2基因开放阅读框包含有978个核苷酸,编码326个氨基酸,其3′UTR包含137个核苷酸。与脊椎动物其他四足动物序列比对分析还发现,短尾蝮蛇的IRF-2基因和推导的氨基酸序列都非常保守,与大部分四足动物的IRF-2相似。从其氨基酸序列中可以辨别出DBD、IDA2和transactivating dom ain等大部分元件和阻遏模体

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    Also received Neglected crops contains a study of 65 crops, mostly of American origin, which at other times or under other conditions, played a fundamental role in the agriculture and food supply of indigenous peoples. Neglected crops 1492 from a different perspective by J Hernandez Bermejo and J Leon 1994 341pp ISBN 92 5 1032173 Publications Division, FAO, Viale delle Terme di Caracalla, 00100 Rorne, ITALY Directory of forestry research organizations 1995 - Compiled jointly by FAO and the International Union of Forestry Research Organizations (IUFRO). In cooperation with the European Tropical Forestry Research Network (ETFRN), this handy directory provides a concise guide to about 750 forestry research organizations in 112 countries. Directory of forestry research organizations 1995 - 1995 227pp Contact Dr Friedrich Shlegel FAO (FORC) Room B.363, FAO An annotated list of diseases, pathogens and associated fungi of the common bean in eastern and southern Africa. This list brings together many widely scattered, unpublished records. It is confined to pathogens and diseases recorded on the common bean (Phaseolus vulgaris) in 20 countries of eastern, central and southern Africa and its off-shore islands. Information is given on their prevalence and pathogenic variability, with a comprehensive bibliography of more than 150 references. An annotated list of diseases, pathogens and associated fungi of the common bean in eastern and southern Africa by D Allen 1995 42pp ISBN 0 85198 938 1 CAB International, Wallingford, Oxon OX10 8DE, UK Agricultural engineering in development: agricultural tyres FAO agricultural services bulletin 104 1993 69pp ISBN 92 5 103287 4 Testing and evaluation of agricultural machinery and equipment FAO agricultural services bulletin 110 1994 272pp ISBN 92 5 103458 3 Selection, testing and evaluation of agricultural machines and equipment FAO agricultural services bulletin 115 1995 68pp ISBN 92 5 103603 9 Publications Division, FAO, Viale delle Terme di Caracalla, 00100 Rome, ITALY Diagnostic farming systems survey in south western Hammassien, Eritrea 1995 61pp College of Agriculture and Aquatic Sciences, University of Asmara, PO Box 1220, Asmara, ERITREA The Caribbean Development Bank by Chandra Hardy 1995 133pp ISBN 1 85339 298 7 IT Publications, 103/105 Southampton Row, London WC1B 4HH, UK Screening methods and sources of resistance to rust and late leaf spot of groundnut. This bulletin describes simple and effective field screening methods to identify genotypes with resistance to these diseases. Production of inoculum, sowing and inoculation of test genotypes, and disease assessment in the field are discussed. Screening methods and sources of resistance to rust and late leaf spot of groundnut Information bulettin 47 1995 20pp ISBN 92 9066 319 7 ICRISAT, Patancheru 502 324, Andhra Pradesh, INDIANeglected crops contains a study of 65 crops, mostly of American origin, which at other times or under other conditions, played a fundamental role in the agriculture and food supply of indigenous peoples. Neglected crops 1492..

    基于线粒体COⅠ基因的沙鳅亚科鱼类DNA条形码及其分子系统发育研究

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    选择线粒体 COⅠ基因作为分子标记,进行沙鳅亚科鱼类(Botiinae)DNA 条形码及其分子系统发育研究。研究获得了沙鳅亚科7属19种共131个个体的COⅠ基因序列,利用MEGA5.0软件分析了沙鳅亚科鱼类COⅠ基因的序列特征,计算了种内及种间遗传距离。沙鳅亚科鱼类的分子系统发育关系的重建分别采用NJ法和Bayesian法。研究发现,沙鳅亚科COⅠ基因的碱基组成为:A 24.4%、T 29.5%、G 18.0%、C 28.1%。沙鳅亚科鱼类种内平均遗传距离为0.002±0.000,种间平均遗传距离为0.148±0.008。DNA条形码研究结果显示,所分析的19种沙鳅鱼类各自分别聚成单系分支,表明 COⅠ基因在本研究中具有100%的物种鉴别率。同时,系统发育分析支持各属的单系性,并且结果显示沙鳅亚科鱼类聚为两个分支,其中一支由薄鳅属和副沙鳅属构成,另一分支则包括:(沙鳅属、色鳅属)和中华沙鳅属、(缨须鳅属、安彦鳅属)。因此, COⅠ基因可以作为有效的分子标记对沙鳅亚科进行DNA条形码研究以及分子系统发育研究

    肺鱼干扰素调节因子1基因(irf-1)的克隆及其在肉鳍类中的分子进化

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    肉鳍类是脊椎动物的重要类群,分为总鳍鱼类和四足类.其中总鳍鱼类现生的物种包括腔棘鱼和肺鱼.四足动物则包括两栖类、爬行类、鸟类和哺乳类.为了比较肉鳍类irf-1基因的结构特点和系统发育意义,本研究克隆了肺鱼irf-1基因cDNA全序列,并与肉鳍类中其他物种的irf-1基因进行了比对分析.IRF是与自然免疫相关的蛋白质,目前已发现了11个家族成员,其中irf-1和irf-2是最先被发现的2个成员,在天然免疫中起着重要的作用.但有关IRF-1的报道主要集中在哺乳动物,其他类群中鲜有报道.与已报道的irf-1基因一样,肺鱼的irf-1基因可读框的前345核苷酸非常保守,在其C端也含有1个反式激活区(transactivationdomain)和1个IRF结合域2(IAD2)的模体.虽然肺鱼与四足动物最近的共同祖先距今有417个百万年之久,但跨肉鳍类的序列分析显示,IRF-1氨基酸及其基因序列在肉鳍类中都具有较强的保守性和显著的系统发育意义.用IRF-1氨基酸序列所构建的肉鳍类系统发育与已有报道的结果也是一致的

    鲤科鱼类的c-myc CDS及其系统发育关系

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    鲤科鱼类在东亚的物种多样,分布广泛,物种特征尺寸差异明显,弄清其功能基因的系统演变,对于理解物种分化和功能进化具有重要意义.以具有重要生长调控作用的c-myc基因为标记,通过PCR扩增、克隆和测序,共获得41种鲤科鱼类和外类群c-myc基因全序列,发现并分析了c-myc编码区的两个高变异区.基于c-myc CDS序列,分别采用最大简约法(MP)、最大似然法(ML)和Bayesian法重建了鲤科鱼类的系统发育关系.3种方法所得系统发育关系较为相似.当以亚口鱼科的胭脂鱼(Myxocyprinus asiat

    红球藻水生748株营养需求的研究

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    红球藻水生748株营养需求的研究金传荫,宋立荣,刘永定,甘小妮(中国科学院水生生物研究所,武汉430072)关键词红球藻,培养基,维生素B_(12),水生1号培养基,醋酸钠THENUTRIENTREQUIREMENTOFAGREENALGAHAEMA..

    肺鱼干扰素调节因子1基因(irf-1)的克隆及其在肉鳍类中的分子进化

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    肉鳍类是脊椎动物的重要类群,分为总鳍鱼类和四足类.其中总鳍鱼类现生的物种包括腔棘鱼和肺鱼.四足动物则包括两栖类、爬行类、鸟类和哺乳类.为了比较肉鳍类irf-1基因的结构特点和系统发育意义,本研究克隆了肺鱼irf-1基因cDNA全序列,并与肉鳍类中其他物种的irf-1基因进行了比对分析.IRF是与自然免疫相关的蛋白质,目前已发现了11个家族成员,其中irf-1和irf-2是最先被发现的2个成员,在天然免疫中起着重要的作用.但有关IRF-1的报道主要集中在哺乳动物,其他类群中鲜有报道.与已报道的irf-1基因一样,肺鱼的irf-1基因可读框的前345核苷酸非常保守,在其C端也含有1个反式激活区(transactivationdomain)和1个IRF结合域2(IAD2)的模体.虽然肺鱼与四足动物最近的共同祖先距今有417个百万年之久,但跨肉鳍类的序列分析显示,IRF-1氨基酸及其基因序列在肉鳍类中都具有较强的保守性和显著的系统发育意义.用IRF-1氨基酸序列所构建的肉鳍类系统发育与已有报道的结果也是一致的
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