遗传力

经换算，连续三胎产仔数及活仔数的n次遗传力值分别为0.35及0.36，接近于高遗传力。

Through conversion , the heritability estimates of litter size and live-litter size for three continous birthes are 0.35 and 0.36 in proper order , they are near high heritability .

MDA含量的广义遗传力为66.78%，狭义遗传力为56.27%。

The broad heritability of MDA content was 66 . 78 % and the narrow heritability of MDA content was 56 . 27 % .

采用MonteCarlo模拟方法，研究了家系数目，家系大小，性状遗传力大小等3个因素在不同组合下，ML法和REML法方差组分估计的准确性。

The effect of ML and REML methods for variance components estimation were studied by using Monte Carlo simulation .

随着群体大小、遗传力的增加，QTL定位越准确。

With the increasing of population size and heritability , the results of Bayesian QTL mapping were more accurate .

各类型组合F1和F2代各节节间长度均表现遗传力较高。说明每节节间长度是一个比较稳定的性状，从早代就可选择。

Inheritance of internode length is relatively high for all three types of crosses , indicating that the character is stable and can be selected at early generations .

从F2∶3估计的主基因遗传力分别为0.54%和18.23%，估计的微效基因遗传力分别为83.56%和16.32%。

And those of the minor genes were estimated as 83.56 % and 16.32 % , respectively .

番茄果实中AI活性的广义遗传力为36.8%，狭义遗传力为21.7%。

A. . The broad sense hereditability of AI in tomato fruit is 36.8 % , the narrow sense hereditability is 21.7 % .

随着遗传力提高和样本容量变大发现QTL的能力提高，但效率下降。

The increase of heritability and sample size can enhance the power of detecting QTL , but the efficiency decreased .

依据模拟结果此时QTL的检测效率主要取决于在指数中所占权重较大的性状的起始遗传力。

According to the simulation results , now power is primarily decided by heritability of the trait with large weight .

地径广义遗传力（h2）为（82.61±8.42）%，遗传变异系数为15.28%。

Broad heritability of collar diameter is ( 82.61 ± 8.42 ) % , genetic variation coefficient is 15.28 % .

本文主要研究杨树（Poplar）双列杂交株高性状亲本配合力效应（CombiningAbilityEffect）的分析和遗传力的估算。

This article mainly deals with the analysis of the combining ability effect of the poplar in the complete diallel cross on the high growth character of the parent and the estimate of such heritability .

遗传力较高时，群体近交系数上升的速度较为缓慢，而QTL方差对群体近交系数上升速度的影响则不甚明显。

When the heritability was higher , the inbreeding coefficient would increase slower , but QTL variance has less effect on it .

对于遗传力较低而QTL方差贡献较大的性状，采用标记辅助遗传评定效果较好；将QTL效应作为随机效应，可以提高种畜效应值估计的效果。

The lower the heritability and the larger the QTL variance component of the trait , the more accuracy of the marker assisted evaluation .

GOT、GPT比活力遗传力分别达87.44%、80.4%，可作为产丝量选择的重要生化指标。

The H of specific activities of GOT and GPT are 87.44 % and 80.4 % , respectively , which can be an effective biochemical criterium for selection of silk yielding .

耐盐性诱导率的广义遗传力为97.9%，说明F1的耐盐突变体诱导率的变异，是以遗传变异为主，受环境影响甚微；

Hereditary capacity in a broad sense of salt-tolerant induction rate is 97.9 % , showing that the variation of induction rate for salt-tolerant mutants mainly depended on genetic variation with less influence of environment .

在现代动物育种实践中，应用分子标记辅助选择（Marker-AssistedSelection，MAS）对低遗传力性状、伴性性状或表达较晚的性状进行选育具有非常重要的意义。

In the modern animal breeding practice , it 's very important to improve breeding efficiency for sex linked , low heritability or late-expressive traits by Marker-assisted selection ( MAS ) .

披垂角的广义遗传力最低（0.277），环境效应则最高（0.723），表明F1叶片披垂角主要受栽培条件等环境因子的影响。

Drooping angle showed lowest heritability of 0.277 and highest environmental effect of 0.723 , which indicated that leaf drooping angle were mainly affected by environmental conditions .

秆长的表现型值及其CRI值受少数主效基因控制，具有较高的狭义遗传力。

Culm length and its CRI were affected by a few major genes , and these traits had high narrow-sense heritability .

F2代部分组合中的广义遗传力表现较高，可以在F2代进行初步的遗传选择；

The broad sense heritability of F2 generations was higher in some crosses . It predicted the selection might be carried out preliminarily in F2 generations .

来自C0和C1的2个S1家系群单株产量的狭义遗传力分别为9.5%和7.5%。

The narrow heritability of yield of two S1 family groups from C0 and C1 populations were 9.59 % and 7.5 % , respectively .

研究结果表明：（1）在遗传力和个体育种值的估计准确度方面，GLM方法具有一定的优势；

GLM has a great advantage in heritability and breeding value estimation , and has nice accuracy for discrete traits .

因此，在QTL遗传力较低时，为了提高QTL位置和效应估计的准确度与精确度，适当的样本容量是必要的。

This result indicates that the appropriate sample size will be necessary for QTL mapping in low QTL heritability to improve the precision of estimates of QTL position and effects .

随着QTL遗传力、样本容量和标记信息含量的增大，QTL位置以及效应估计值的准确度和精确度逐步提高。

The accuracy and precision of estimates of QTL position and effects will be enhanced as the increasing of QTL heritability , sample size and polymorphism information content of molecular marker .

采用计算机模拟方法系统比较了目标数量性状的遗传力和标记密度对F2设计下单个性状数量性状座位（QTL）区间定位效果的影响。

The effects of interval mapping for quantitative trait loci ( QTL ) of single trait under different heritabilities and marker densities in a F2 population were compared by computer simulation .

通过对山杏进行种源苗期、林期试验和RAPD分子标记实验，结果表明：种源间苗高、地径、冠幅等性状存在极显著差异，且广义遗传力较高；

The result of provenance trial and RAPD molecular markers experiment of Armeniaca sibirica showed that the characters such as height , ground diameter and crown , were distinct different among provenance , genetic ability is high .

特别是在高QTL效应和低遗传力的情况下标记辅助BLUP的优势最为明显，个体遗传评定的相对准确性增加幅度也最大。

However , with the increase of QTL effect , the relative advantage of the MBLUP improved correspondingly , especially in the case with low heritability and high QTL effect .

尽管抗蚜性的遗传力较高，由于F2代抗性个体很少，而野生大豆又带有许多难以克服的不利性状，因此，选择的世代应适当推迟。

Despite of the high heritability of aphid resistance , It is recommended that the selection of resistance should be postponed to later generations such as F3 or F4 , because of the scarcity of resistant plants and the undesired wild soybean characters in F2 generation .

由此作者认为这个微效QTL有着很高的遗传力，可以通过NIL-F2群体将该基因图位克隆。

Therefore , we suggested that minor QTLs for traits with high heritability could be isolated using a map-based cloning strategy in a large NIL-F2 population .

如QTL的遗传力10%、标记间距15cM，则样本容量300就可保证QTL的发现能力达80%以上。

For instance , the heritability of a QTL was 10 % and the marker density was 15 cM , F 2 population of 300 individuals can ensure the power of detecting QTL high 80 % .

应用数量遗传学的方法分析了水稻二化螟（Chilosuppressalis）对杀螟硫磷抗药性的遗传力，并就遗传力和杀虫剂的杀死率对抗性发展速率的影响进行了预测。

With the method of probit analysis , we estimated the realized heritability ( h2 ) of resistance to fenitrothion in the rice stem borer ( Chilo suppressalis Walker ) .