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jumping gene
相关语句
  跳跃基因
     Jordan Gene:Jumping Gene Found in Volvox Carteri
     乔丹基因:在团藻中发现的跳跃基因
短句来源
  相似匹配句对
     Jordan Gene:Jumping Gene Found in Volvox Carteri
     乔丹基因:在团藻中发现的跳跃基因
短句来源
     Gene Therapy
     基因治疗
短句来源
     Gene Sequences
     基因序列(英文)
短句来源
     Research on Jumping Robots
     跳跃式机器人研究
短句来源
     Jumping Jack flash
     跳动性闪光
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  jumping gene
Jumping Gene gs of Lycopersicon lycopersicum (L.) Karsten ex Farw
      
Jumping gene--A gene that moves from one gene to another or from one place on a chromosome to another; also known as a transposon.
      


Jumping-gene,the epoch-making concept was discovered and put forward by B. McClintock, an American genetist who ~made many cytogenetical researches on maize during 1940—1950. In the middle of Italy there is a genetical institute where some of the maize researchers are using the jumping-genes for changing dominant oPaco-2 gene into reccesive opaco-2 gene in accordance with the character of the jumping-genes' being non-fixed on the maize chromosomes. In this way...

Jumping-gene,the epoch-making concept was discovered and put forward by B. McClintock, an American genetist who ~made many cytogenetical researches on maize during 1940—1950. In the middle of Italy there is a genetical institute where some of the maize researchers are using the jumping-genes for changing dominant oPaco-2 gene into reccesive opaco-2 gene in accordance with the character of the jumping-genes' being non-fixed on the maize chromosomes. In this way the non-ziene protein content of maize can be increased. This has broken new ground for the imProVement of the maize qaulity.

关于跳跃基因这一划时代的概念是由美国的McClintock在四十年代未五十年代初在玉米的遗传研究中发现和提出的。意大利中部的一个玉米遗传研究所根据跳跃基因在染色体上的位置不固定的特点,应用它们来定向地把玉米的显性Opaco—2基因突变为隐性opaco—2基因,从而使玉米籽粒含非醇溶性蛋白质的量提高。这为玉米的品质改良开辟了一条新途径。

P elements in D.melanogaster are DNA transposons and received greater attention within the last few decades.P elements are used for identifying genes of interest,for cloning them,and for placing them back into the genome.The high mobility of P elements and their retention of this mobility and drastic modiffications to their internal sequences are also essential features.Another most important use of P elements is that of making transgenic flies.Desired gene is placed between P element ends,usually...

P elements in D.melanogaster are DNA transposons and received greater attention within the last few decades.P elements are used for identifying genes of interest,for cloning them,and for placing them back into the genome.The high mobility of P elements and their retention of this mobility and drastic modiffications to their internal sequences are also essential features.Another most important use of P elements is that of making transgenic flies.Desired gene is placed between P element ends,usually within a plasmid,and injected into preblastoderm embryos in the presence of transposase.This P element then transposes from the plasmid to a random chromosomal site.Reported in a typical experiment,10%~20% of the fertile injected flies produce transformant progeny.But the instability of the transferred gene carried on a piece of mobile DNA as a vector and its interaction with endogenous jumping genes.This paper introduced the studies advances of P transposable element in Drosophila.The genetic mobility of these elements can also make them suitable for the construction of vectors to create transgenic organisms.If so,the genetic stability of the vectors introduced to a foreign genome should be a important subject.

果蝇P因子是DNA转座子 ,在近几十年里受到很大关注。可用于确认有关基因 ,克隆基因以及安置基因回到基因组。P因子的高易动性及其保持和对内部序列强烈的修饰作用也是P因子的本质特征。P因子的另一重要用途是用于产生转基因果蝇。目的基因置于质粒内P因子中可在转座酶的作用下插入前胚盘胚。携带目的基因的P因子可从质粒转座到任意染色体上。据报道 ,在典型实验中 ,插入可育果蝇的10 %~20 %可产生转化体后裔。但是以这种可动DNA片段作为载体尚存在转移基因的不稳定性及与内源跳跃基因的相互影响。本文介绍了果蝇P转座因子的一些研究进展。这些因子的遗传可动性也使它们适用于建造载体产生转基因生物。若如此 ,载体导入外源基因组的遗传稳定性问题将是一个重要课题。

This paper described the control problem on maize pigment in aleurone by multi-pair genes.The ge-netics of purple glutinous maize is rather complicated.The jumping gene discovered by Moclintock,B.in early year had been comfirmed to be a source in1980s which results in the mottled mutation.In effect,the jumping gene is controlled by transposition.The market requirment for youngling ears versus the genetics of pigment becomes a contradiction,Which is hard to be tackled.Therefore,the plant breeding...

This paper described the control problem on maize pigment in aleurone by multi-pair genes.The ge-netics of purple glutinous maize is rather complicated.The jumping gene discovered by Moclintock,B.in early year had been comfirmed to be a source in1980s which results in the mottled mutation.In effect,the jumping gene is controlled by transposition.The market requirment for youngling ears versus the genetics of pigment becomes a contradiction,Which is hard to be tackled.Therefore,the plant breeding methed of purple glutinous is a projects worthly of research.

概述玉米子粒色素在糊粉层受多对基因控制。紫色糯玉米的遗传较为复杂,早年,麦克林托克(Mclintock,B.)指出的跳跃基因,在80年代探明这类跳跃基因导致的玉米花斑色突变,实质上是受转座子控制。紫糯玉米青穗市场的需求与紫糯玉米色素的遗传形成了矛盾,难以克服。紫糯玉米的育种方法是值得研究的课题。

 
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