genetic variance 中文意思是什麼
genetic variance
解釋
遺傳變量-
Only the additive genetic variance is transmissible by seed.
僅僅加性遺傳方差是由種子遺傳的。 -
The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602.
從半同胞協方差估計出來的，同一性狀的加性遺傳方差為09602。 -
The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed
較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。 -
A side effect of increasing genetic variance following disruptive selection is often greater genetic flexibility of the population.
經分裂選擇后遺傳變量增加的附帶作用，往往使種群的遺傳可塑性有所增加。 -
A side effect of increasing genetic variance following disruptive selection often causes greater genetic flexibility of the population.
經分裂選擇后遺傳變量增加的附帶作用，往往使種群的遺傳可塑性有所增加。 -
Additive genetic variance
加性遣傳方差 -
The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602
從半同胞協方差估計出來的，同一性狀的加性遺傳方差為0 9602 。 -
Application of infaraed image segmentation based on 2d maximum between - cluster variance and genetic algorithm
二維最大類間方差和遺傳演算法在紅外圖像分割中的應用 -
This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits
本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的 -
Several results were concluded : firstly, the population of t. jackii was decreasing sharply and its living area was contracting, so the percentage of genetic variance among t. jackii populations was lower than that within its population ; secondly, its genetic diversity index was relatively high ; thirdly, according to its gene flow index, the population disintegration of the species could be prevented by genetic communication among populations of the species ; finally, the similar index between the populations from jiangshi nature reserve and from xufan reservoir was higher than that between the populations from jiangshi nature reserve and from xufanggeng, corresponding with the fact that it is nearer between jiangshi nature reserve and xufan reservoir than that between jiangshi nature reserve and xufanggeng
2 、長葉榧的遺傳多樣性分析，分析了多態位點百分率（ percentageofpolymorphicsites ） 、 nei氏基因多樣性指數（ nei 』 sgenediversityindex ） 、 shannon信息指數（ shannon 』 sinformationindex ） 、居群間的相似系數（ geneticsimilarityindex ）和遺傳距離（ geneticdistance ） 、遺傳變異在居群間和居群內的分佈（ thepercentageofvarianceamongandwithinpopulation ）及基因流（ geneflow ） 。結論是：分佈在群體間的遺傳變異較分佈在群體內的遺傳變異小，說明該生物的分佈范圍越來越狹小。 -
As a whole, the result of population genetic structure detected by rapd and issr was consistent, yet there was a little difference between intra - population genetic diversity. this was mainly because of the ability of detecting genetic variance of the two techniques
5 ? rapd和issr對于群體遺傳結構的分析結果是一致的，但是在群體內的遺傳二」多樣性上略有差異，這主要是因為兩種技術的對遺傳變異的檢測能力不同，同時在進行群體遺傳分析時issr的取樣量偏少也是影響這個結果的一個主要原因。 -
Then the research of image enhancement based on of plateau equalization algorithm and genetic algorithm is done then in this chapter. image segmentation with algorithm of 2d - maximal variance between - class and region growing is accepted to eliminate the background and the isolated noise points which can not be the target
論文在紅外目標檢測方面，以對經過預處理的圖像進行分割為切入點，採用二維類間方差法和局域生長法來進行圖像的分割，消除了原始圖像中一些不可能為目標的孤立噪聲點和大面積的背景區域。 -
Known susceptibility genes account for less than 25 % of the familial risk of breast cancer, and the residual genetic variance is likely to be due to variants conferring more moderate risks
大家知道乳腺癌的家族危險性的小於25 %是由於易感基因，而剩餘的遺傳變異更多是由於變異體，而這種變異引起更多的風險。 -
The results show that although dbm method can fit the systems with high precision, avoid over - fitting and accurately reflect the time - variance and state - dependency in the systems, it may also reduce the efficiency of the whole method due to the exponentially increasing calculating numbers with the increase of the number of the states. and genetic algorithm is introduced to improve the search efficiency
接著利用dbm方法和其他非線性辨識演算法分別對時變參數方程、 lorenz方程和杜芬方程進行分析和比較，發現盡管方法本身具有擬合精度高，不存在過擬合現象，可以較精確的反應參數對于狀態或者時間的依存關系等特點，但是sdp方法在分析復雜問題時存在搜索效率低，計算時間長的缺點。 -
Solution method of matrix units of genetic variance and covariance in estimating cows ' genetic value
協方差的最優二次型無偏估計
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