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上位性基因
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  “上位性基因”译为未确定词的双语例句
     There is only one pairs of epistatic QTLs for root length, root surface area and root tips, respectively.
     其中根体积和平均根直径各检测到4对和5对上位性数量基因座,而根长、根表面积和根尖数量都分别只检测到一对上位性基因位点。
短句来源
     The main result was as followed:(1) Additive e ffect, and dominant e ffect were detected in a 11 of the crosses.
     结果表明:(1)依据六参数联合尺度测验,温带与热带自交系间杂交种的穗部几个性状的遗传中,除加性效应、显性效应外,还普遍存在着上位性基因效应。
短句来源
     The results showed that under low latitude environment the growth stages of F_1 was close to or earlier than P_1, and the ranges of F_2 population and F_ 2:3 family were wider than that of parents. Indicating that the growth stages were controlled mainly by dominance gene effect along with addictive and epistatic gene effects under low latitude environment.
     结果表明:在低纬度环境下,玉米生育期,F1平均值早于或接近黄早4 ,负向杂种优势明显,F2 和F2 :3家系普遍存在超亲单株和株系,说明低纬度环境,生育期是以显性为主,受加性、显性和上位性基因的共同作用;
短句来源
     These results indi-cated that both single and epistatic loci were involved in the ABA sensitivity in rice, and the genetic basis of ABA sensitivity at seed germination and seedling stage was largely different.
     这些研究结果说明,水稻对ABA的敏感性同时受单位点的多基因和上位性基因控制; 而且控制种子萌发阶段发芽势和苗期对ABA敏感性的遗传基础有很大的不同。
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  相似匹配句对
     4 new genes were obtained.
     U基因
短句来源
     Genetic Information Carrier Gene
     基因简史
短句来源
     The main cause produced the heterosis is the dominance or the epistasis of gene there are.
     产生杂种优势的主要原因是这些性状存在基因显性或上位性优势。
短句来源
     Both the independent two major genes and polygenes had additive-dominance-epistatic effects.
     独立的2对主基因和多基因都存在加性显性上位性效应。
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  epistasis gene
Epistasis gene interactions were observed in colored resistance × white resistance cross.
      
Of particular relevance is the evaluation of the frequency and magnitude of epistasis (gene-gene and gene-environment interaction) as it plays a controversial role in models of adaptation within and among populations.
      


Generation means analyses which were introduced by K.Mather andJ.L.Jinks(1977)were used to study weight of grain per plant,weightof ears per plant,weight per 100 seeds,number of kernels per row,row number of kernels per ear,number of ears per plant and ear lengthin corn(Zea mays L.).Eight inbred line parents,P_1,P_2,their se-ven F_1 hybrids,their seven F_2,and 14 backcross populations,B_1,B_2,were used in the analysis.G.S.Chahal and J.L.Jinks(1978)introduced general method ofdetecting the additive,dominance...

Generation means analyses which were introduced by K.Mather andJ.L.Jinks(1977)were used to study weight of grain per plant,weightof ears per plant,weight per 100 seeds,number of kernels per row,row number of kernels per ear,number of ears per plant and ear lengthin corn(Zea mays L.).Eight inbred line parents,P_1,P_2,their se-ven F_1 hybrids,their seven F_2,and 14 backcross populations,B_1,B_2,were used in the analysis.G.S.Chahal and J.L.Jinks(1978)introduced general method ofdetecting the additive,dominance and epistatic variation that inbred li-nes can generate using a single tester.This method was simultaneouslyused to study the several characters.In connection with the specific group of parents studied,the resultsof these experiments indicate that additive,dominance and epistaticgene effects were all important in the inheritance of weight of grainper plant,weight of ears per plant,number of kernels per row and-ear length.weight per 100 seeds was controlled by additive and cpista-tic gene effects.The genetic variation of the number of ears per plant may mostlybe attributed to additive gene effects and in part to epistasis.In addi-tion,the genetic variation may mostly be attributed to additive gene ef-fects and partly to dominance and epistasis for row number of kernelsper ear.

用世代均数分析法研究了玉米单株籽粒产量、穗重、百粒重、行粒数、穗行数、穗数以及穗长7个性状的遗传。对8个亲本自交系组成的7个杂交组合进行了分析。每个组合群体都由 P_1、P_2、F_1、F_2、B_1和 B_2世代组成。同时用G.S.Chahal 和 J.L.Jinks(1978)提出的用单一测验种探测一群近交系可能产生的加性、显性和上位性变异的一般方法进行二级统计量基因效应分析。本试验分析表明,单株籽粒产量、穗重、行粒数、穗长和百粒重五个性状都存在着显著的加性基因效应和上位性基因效应。除百粒重的显性基因效应较不重要外,这几个性状的显性基因效应也都有重要表现。分析结果表明:单株有效穗数的基因效应以加性效应为主,上位性效应次之,关于穗行数,虽然用二级统计量分析发现了显性效应的作用,但从杂种优势表现不明显,和一级统计量分析结果表明,穗行数主要表现为被加性基因效应控制。

An attempt was made to investigate the variation, segregation and gene effect of some agronomic characters of interspecific crosses in soybeans (Glycine max x G. soja, G. max x G, gracilis). Effect of backcrossing with cultivated soybean as recurrent parent was analysed in order to find out reasonable and effective methods for utilizing wild and semi-wild soybean germplasms.Parsnts (Pw, Pc) and F1, F2, F3, Bw, Bc, BF2 generations of two G, max x G. sofa crosses and four G, max x G, gracilis crosses were investigated...

An attempt was made to investigate the variation, segregation and gene effect of some agronomic characters of interspecific crosses in soybeans (Glycine max x G. soja, G. max x G, gracilis). Effect of backcrossing with cultivated soybean as recurrent parent was analysed in order to find out reasonable and effective methods for utilizing wild and semi-wild soybean germplasms.Parsnts (Pw, Pc) and F1, F2, F3, Bw, Bc, BF2 generations of two G, max x G. sofa crosses and four G, max x G, gracilis crosses were investigated in the present study. The results show that F1 generation is not completely fertile; epistatic gene effect is a common existing and important genetic component. There exists a wide range of variation of the characters studied in F2 and F3 generations so that in interspecific crosses potential of selection for new types is high. The key point in utilizing wild and semi-wild soybean germplasms lies on choosing appropriate parental materials for crossing.Backcrossing is an effective method to utilize wild and semi-wild soybean germplasms. But backcrossing induces reduction of protein content, so it is not proper to take too numerous cycles of backcrossing. If suitable parents are used, it is possible to abtain an ideal type through one or two cycles of backcrosses in G.max x G. soja crosses, and one or even no backcross in G, max x G. gracilis crosses.From a long-term point of view, the high protein content and some other desirable characters of wild soybeane (G. soja) are very valuable. At present, however, it seems more effective and more rapid to use semi-wild soybeans (G. gracilis) as parental materials to develop new lines or cultivars.

本文对大豆种间杂交(Glycine max (L) Merril×G. soja Sieb. and Zucc., G. max×G.gracilis Skvok Tzow)后代的性状表现及基因效应进行了研究,并初步分析了以栽培大豆为轮回亲本的回交效应。结果表明:F_1代育性不完全正常。上位性基因效应是普遍存在的、不可忽视的重要遗传组成成分。种间杂交后代分离广泛,类型丰富。利用野生资源成败的关键在于亲本选配。回交是利用野生资源的一条有效途径。半野生大豆的价值不容忽视。

This paper is concerned in estimating gene effects of 9 quantitative characters in barley and finding the differences of gene effects betwween six—rowed x two—rowed, two—rowed x two—rowed and six—rowed x six—rowed crosses. Materials for the experment consisted of 8 different ear—type barley varieties and their 9 F_1 's and F_2 's hybrids, backcrosses B_1 's and B_2 's. Estimates of gene effect of. 9 crosses on 9 quantitative charactes, including d, h, i, j,l effects, together with their variances and percentage...

This paper is concerned in estimating gene effects of 9 quantitative characters in barley and finding the differences of gene effects betwween six—rowed x two—rowed, two—rowed x two—rowed and six—rowed x six—rowed crosses. Materials for the experment consisted of 8 different ear—type barley varieties and their 9 F_1 's and F_2 's hybrids, backcrosses B_1 's and B_2 's. Estimates of gene effect of. 9 crosses on 9 quantitative charactes, including d, h, i, j,l effects, together with their variances and percentage of squre sum, were obtained by Mather's generation mean analysis method. The results showed that there were significant epistatic gene effects in all crosses for the 9 investigated characters, Ear type gene had significant pleiotropic effects on the inheritance of other traits, including the relative role of additive gene effect (d), the relative role and direction of h,i, j,l ger(?) effects. This study indicates that both are very important in barley breeding to notice the genetic characteristics of traits and to attend to the speciality of gene offects in different ear type crosses.

以棱型有别的8个大麦品种杂交得到的9个组合的P_1、P_2、F_1、F_2、B_1和B_2为材料,用世代均数法或世代小区均数法估算了各组合9个性状的各类基因效应及效应平方和百分比,分析比较了二棱×二棱、六棱×六棱和六棱×二棱三种组合的各类基因效应的异同。结果表明,上位性基因效应对大麦的性状遗传具有重要影响;棱型基因对其它性状的遗传有明显的多效性效应,表现为对加性效应(d)的相对作用大小和对显性(h)、上位性效应的方向及相对作用大小有效应。结果认为,在大麦杂交育种中,不仅要考虑性状的遗传规律,而且要注意不同棱型组合的基因效应特点。

 
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