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加性遗传方差
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  additive genetic variance
     Such factors as proportion of additive genetic variance due to major loci, heritability, correlation between traits, gene frequency on major loci, major genotypic value, dominant genotypic value within major loci and substitution effect of major loci were mainly considered.
     主要考虑了以下几个决定因素:主效基因位点的加性遗传方差比例、遗传力、性状间相关、主效位点基因频率、主效位点基因型效应、显性效应和主效基因位点的替代效应。 这些因素在二性状育种目标情况下对RSE的影响程度各不相同,其变化模式也有所不同。
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     The therotical equation for additive genetic variance of mark gene was established for individual level and seperate population level in linkage equilibrium.
     分别在个体水平上以及在复合连续平衡的分离群体水平上建立了标记基因加性遗传方差值的理论方程。
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     Theestimates of additive genetic variance are larger than those of dominance,and the stability of the former estimate is also obviously larger than thatof the latter.
     而且,加性遗传方差估值多大于显性方差,前者的估值稳定性也明显大于后者。
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     The results showed that additive-dominance effects of five traits were a significance level at 1% and additive genetic variance components rate was bigger than dominance,the genetic was mainly controlled by additive effects and controlled by both additive-dominance genetic effects too.
     结果表明,5个性状的加性及显性效应都达极显著水平,加性遗传方差分量比率较显性大,其遗传以加性效应为主,受加性及显性基因共同控制;
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     Additive genetic variance of mark gene of parents can be used for detecting the select efficiency.
     亲代由标记基因遗传给后代的加性遗传方差值可以用来测定标记基因这种效益。
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  “加性遗传方差”译为未确定词的双语例句
     A sire and dam model and a sire and maternal grandsire model are fitted for weight at birth and weight at weaning of sheep to estimate the direct genetic and maternal additive genetic variances.
     本文利用公畜母畜模型和公畜外祖父模型估计了初生重、断奶重的直接加性遗传方差、母本遗传方差和遗传参数,得出初生重的直接加性遗传效应、母本遗传效应和总的加性遗传效应的遗传力分别为:0.164、0.101、0.103;
短句来源
     Estimates of the additive,dominant and environmental variances were 45.922,20.321 and 1.210,suggesting that additive component was the main genetic variance.
     加性、显性和环境方差的估计数依次为45.922、20.321和1.210,说明加性遗传方差比非加性遗传方差更重要;
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     The largest contribution of dominant variance to yield was due to the length of middle leaves. All agronomic traits investigated had small contribution to yield due to additive × environment interaction effects and dominant × environment interaction effects.
     结果表明,株高对产量的加性遗传方差贡献率最高,腰叶长对产量的显性遗传方差贡献率最高,各农艺性状对产量的加性×环境互作遗传方差、显性×环境互作遗传方差的贡献率均较小。
短句来源
     But the latter were significantly and negatively associated with the coefficient of environmental variation.
     性状加性遗传方差占总遗传方差的百分率与环境的变异系数呈显著的负相关,秩相关系数为—0.832。
短句来源
     When the sample size reaches a certain level (e.g. 40 families with 100 sons per family), or when the QTL effect is large (e.g. the QTL explains 50% of the genetic variance), the decrease of MSE will be only slightly affected by otrher factors.
     当样本含量达到一定水平时(如40个家系,每个家系100个儿子),或当QTL效应达到一个较高水平时(如QTL方差占加性遗传方差的50%),MSE随标记密度加大而下降的幅度几乎不受其他因素的影响,始终保持一个较高的水平(95%左右)。
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  相似匹配句对
     A Genetic Analysis for Generation Variances
     世代方差遗传分析
短句来源
     A Genetic Analysis for Generation Variances (Continued)
     世代方差遗传分析(续)
短句来源
     Special attention should be given to the decrease of the additive variance of yield trait,and this will most possibly make genetic background narrow.
     值得注意的是,产量性状的加性方差有降低的趋势,遗传基础可能变窄。
短句来源
     The variance component analysis revealed that the ratios of additive genetic variance to phenotypic variance of the majority of economic traits were high.
     进一步的方差组分估计表明 ,主要经济性状的加性遗传方差较大。
短句来源
     Components of means and genetic variances in different endosperm generations from a cross between two inbred lines are presented (Tables l and 2).
     给出了加性-显性模型下有关胚乳世代的平均数和遗传方差的分量.
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  additive genetic variance
Significant additive genetic variance has been demonstrated in female pheromone production in monomorphic populations.
      
These results indicate that this pheromone communication system has significant additive genetic variance needed for its evolution.
      
For days taken to flower, the importance of additive genetic variance was greater than that of the dominance component with directional dominance towards the recessive allele.
      
The advantages of CSCS increases as the proportion of non-additive genetic variance increases.
      
In the F2 generation of the cross between burley varieties,Ky 14 andKy Ex 42, estimates of additive genetic variance were significant for yield, days to flower, and number of leaves.
      
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The study conducted during the period of 1981—1983 is to examine some ph-

1982~1983两年内,对影响玉米籽粒产量和千粒重有关的灌浆性状进行了研究,结果表明:籽粒灌浆速率和有效灌浆期是影响千粒重和籽粒产量的两个重要生理因素,有效灌浆期对单株籽粒产量的作用是直接的(相关系数为r=0.885,1982;r=0.5754,1983)。籽粒灌浆速率对单株籽粒产量的作用是间接的,相关系数很小(r=0.015,1982;r=0.012,1983;)其原因主要是受穗粒数的影响较大。在穗粒数一定的情况下,籽粒灌浆速率与籽粒产量的偏相关达十分显著的水平(r_(yx1.X2)=0.9694,1982;r_(YX1.X2)=0.8923,1983)。通径分析表明:籽粒灌浆速率和有效灌浆期主要是通过千粒重影响产量,籽粒灌浆速率对千粒重的直接效应(P=0.849)大于有效灌浆期对千粒重的直接效应(p=0.521)。对单株籽粒产量的直接效应也是籽粒灌浆速率(P=0.2152)大于有效灌浆期(P=0.0681)。因此,在一定穗粒数的基础上,通过提高籽粒灌浆速率增加单株籽粒产量比延长有效灌浆期更为有效。研究结果还表明:杂交种的籽粒灌浆速率与双亲自交系籽粒灌浆速率的中亲值具有较高的相关。杂交种的有效灌浆期与亲本...

1982~1983两年内,对影响玉米籽粒产量和千粒重有关的灌浆性状进行了研究,结果表明:籽粒灌浆速率和有效灌浆期是影响千粒重和籽粒产量的两个重要生理因素,有效灌浆期对单株籽粒产量的作用是直接的(相关系数为r=0.885,1982;r=0.5754,1983)。籽粒灌浆速率对单株籽粒产量的作用是间接的,相关系数很小(r=0.015,1982;r=0.012,1983;)其原因主要是受穗粒数的影响较大。在穗粒数一定的情况下,籽粒灌浆速率与籽粒产量的偏相关达十分显著的水平(r_(yx1.X2)=0.9694,1982;r_(YX1.X2)=0.8923,1983)。通径分析表明:籽粒灌浆速率和有效灌浆期主要是通过千粒重影响产量,籽粒灌浆速率对千粒重的直接效应(P=0.849)大于有效灌浆期对千粒重的直接效应(p=0.521)。对单株籽粒产量的直接效应也是籽粒灌浆速率(P=0.2152)大于有效灌浆期(P=0.0681)。因此,在一定穗粒数的基础上,通过提高籽粒灌浆速率增加单株籽粒产量比延长有效灌浆期更为有效。研究结果还表明:杂交种的籽粒灌浆速率与双亲自交系籽粒灌浆速率的中亲值具有较高的相关。杂交种的有效灌浆期与亲本自交系的高亲值具有较高的相关。高灌浆速率×高灌浆速率的自交系组配的杂种F_1的籽粒灌浆速率显著地高于高灌浆速率×低灌浆速率和低灌浆速率×低灌浆速率自交系组配的杂交种F_1的籽粒灌浆速率。而有效灌浆期的这个效应不显著。配合力分析说明:籽粒灌浆速率和有效灌浆期的一般配合力在遗传上是主要的,其加性遗传方差占总遗传方差的比值分别是85.71%和94.63%。所以着眼于提高一般配合力的育种方法对这两个性状进行选择都是有效的。

Dialled crosses of six parents in Upland cotton(Gossypium hirsutum L.)were analysed for heterosis and genetic effects of yield traits.F: hybrids showed the highest heterosis for lint yield per plant with the average value of 33.13%.There were positive heterosis for number of bolls per plant(17.38%),boll size(10.60%),lint percentage(2.90%)and fiber length(6.50%).Average heterosis for number of fruit nodes per plant of F1 hybrids was 0.96%.Variance associated with general and specific combining ability was highly...

Dialled crosses of six parents in Upland cotton(Gossypium hirsutum L.)were analysed for heterosis and genetic effects of yield traits.F: hybrids showed the highest heterosis for lint yield per plant with the average value of 33.13%.There were positive heterosis for number of bolls per plant(17.38%),boll size(10.60%),lint percentage(2.90%)and fiber length(6.50%).Average heterosis for number of fruit nodes per plant of F1 hybrids was 0.96%.Variance associated with general and specific combining ability was highly significant for every trait,but no significant reciprocal differences were noted.For every trait studied,the parental performance was positively related to its general combining ability which was also associated with the performance of the F1 hybrids.It is,therefore,possible to predict the performance of general combining ability and of the F1 hybrids by the parental phenotype.Additive genetic variances predominated over all traits except boll size,for which the main component of genetic variance was of the dominance type.The dominance effect was relatively small for number of fruit nodes per plant,but large for other traits.The narrow-sense heritability of lint yield per plant was found to be 28.24%.Except for boll size,the yield components had higher heritability than lint yield per plant.Lint yield per plant and lint percentage showed ambidirectional dominance.But other traits were governed by uni-directional dominant genes,and those for number of fruit nodes per plant had negative effect,while those for number of bolls per plant,boll size and fiber length had positive effects.

以陆地棉(Gossypium hirsutum L.)6个品种进行完全双列杂交,分析了产量性状的杂种优势及其遗传效应,F1单株皮棉产量的杂种优势最强,平均为33.13%;单株结铃数、单铃重、衣分和纤维长度的平均杂种优势分别为17`38%、10.60%、2.90%和6.50%;单株果节数的平均杂种优势为0.96%。所有6个性状的一般配合力和特殊配合力都极显著;杂交组合的正反交差异均不显著。亲本品种的产量性状表现与其一般配合力的表现呈正相关,亲本一般配合力与杂交组合的表现也存在一致的趋势。因此,可根据亲本的表现型预测其一般配合力表现和F1的表现。 除了单铃重外,所有往状的加性遗传方差都大于显性方差。单株皮棉产量的狭义遗传力为28.24%;除单铃重外,其它产量性状的狭义遗传力都高于皮棉产量的狭义遗传力。在6个品种中,单株皮棉产量和衣分的显性基因作用方向比较复杂,其它性状的显性基因作用方向一致。单株果节数的显性基因起减少果节数的作用,单株结铃数、单铃重和纤维长度的显性基因起增值作用。

Forty Fl's derived from crosses of eight female parents and five male parents were utilized to make genetic researches on twelve characters of wheat and to evaluate the patents and crosses.The results indicated that effective duration of flag leaves was controlled only by additive genes and all other eleven characters were controlled by both additive andnonadditive genes.The performance of F1's could be predicted by general combining ability of both parents for the characters which were mainly determined by...

Forty Fl's derived from crosses of eight female parents and five male parents were utilized to make genetic researches on twelve characters of wheat and to evaluate the patents and crosses.The results indicated that effective duration of flag leaves was controlled only by additive genes and all other eleven characters were controlled by both additive andnonadditive genes.The performance of F1's could be predicted by general combining ability of both parents for the characters which were mainly determined by additive genes.The predictive reliability was significantly and positively as- sociated with the ratio of additive variance to total genetic variance.But the latter were significantly and negatively associated with the coefficient of environmental variation.Changzhi 6703 and Commune No.5 of agronomic par- ents and 336D3—222 and 759C1—2212 of quality parents possessed many ava- ilable characters.They can be utilized in high yield-high protein breeding.

本试验用八个农艺亲本与五个品质亲本按 P×Q 交配模式配制的40个 F_1为材料,对小麦籽粒蛋白质含量、产量等12个性状的遗传特性进行了研究,对亲本和组合的利用价值进行了评价。结果表明,旗叶功能期主要是由加性基因控制的,其余11个性状是由加性基因和非加性基因共同控制的,但对不同性状,两者所起的作用是不等的。对于以加性效应为主的性状,可以利用双亲的一般配合力来预测 F_1的表现,其可靠程度与一般配合力方差占遗传方差的百分率密切相关(r_s=0.916)。性状加性遗传方差占总遗传方差的百分率与环境的变异系数呈显著的负相关,秩相关系数为—0.832。农艺亲本中长治6703、公社5号,父本中336D_3—222、759C_1—2212表现了较多的优点,可在高产优质育种中加以利用。

 
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