| 词汇 | example_english_directional-selection |
| 释义 | directional selectioncollocation in Englishmeanings of directionaland selectionThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with selection. directional adjective uk /daɪˈrek.ʃən.əl/ us /daɪˈrek.ʃən.əl/ electronicsspecialized Directional radio equipment receives or sends stronger signals in ... See more at directional selection noun uk /sɪˈlek.ʃən/ us /səˈlek.ʃən/ the act of choosing someone ... See more at selection Examples of directional selectionThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. They concluded that directionalselection for resistance to attack by the parasitoid, and not any kind of rare advantage, is responsible for their results. Perhaps the clearest prediction is that the effect of directionalselection on heterogeneity is likely to be greatest when selection is intense. Most quantitative characters (apart from fitness) are subject to stabilizing selection, while fitness is subject to directionalselection. Directionalselection can result in very large increases in genetic variance as initially rare alleles increase in frequency. Predictions are based only on information available at generation zero of directionalselection. Directionalselection and the evolution of breeding date in birds. Therefore, directionalselection in moderate to large-sized populations is likely to cause an increase in genetic variance. Alternatively, local selection (without balancing selection within demes) was modelled by assuming directionalselection acting in opposite directions in the two subpopulations. The terms inside the parentheses of (4) and (7) are the genetic coefficient of variation of fitness traits under directionalselection. Effects on phenotypic variability of directionalselection arising through genetic differences in residual variability. Predicting cumulated response to directionalselection in finite panmictic populations. However, if all genes interact via one trait, as here, pairwise epistasis must decrease as 1\#, whereas directionalselection decreases as 1\ (16). These predictions were accurate despite the fact that the genetic variances changed by more than 20 % during the directionalselection phase. The expected average genotypic value for all traits is zero before directionalselection. One possibility is that inversion frequencies are determined by episodes of directionalselection (including shortlived balancing selection) rather than long-lived balancing selection. Effective size and polymorphism of linked neutral loci in populations under directionalselection. To simulate directionalselection, the optimal value for trait 3 is shifted upwards by 10 phenotypic standard deviation units. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of directional Go to the definition of selection See other collocations with selection |
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