[PDF] Top 20 SELECTION IN EXPERIMENTAL POPULATIONS. I. LETHAL GENES

... In a population where selection is different in females and males, then, the gene frequency changes approximately as if the two sexes had a common selective value equal to t[r] ... See full document

... of selection indices in selecting experimental strawberry hybrids for in natura consumption and ...from populations derived from their ...hybrid selection, the following indices were used: ... See full document

... positive selection of ...japonicum populations in mountainous regions and those in the lakes area of the middle and lower Yangtze ...of selection in the ... See full document

... I n small populations, however, the random fluctuation of gene frequencies be- comes important, and the mean gene frequency is expected to be smaller than the value given by (9) [r] ... See full document

... positive selection in which selective forces, such as immune responses and drugs, drive the accumulation of mutations and maintain diversity in the population ...that genes involved in infection or main- ... See full document

... non-conditional lethal mutations can be maintained in heterozygosity using chromosome balancers, commonly expressing green fluorescent protein (GFP) in the ...worm populations of interest, particularly at ... See full document

... In order to investigate the possibility of increased selection for duplications of these genes in natural populations exposed to high levels of heavy metals, we compar[r] ... See full document

... Expressions are found for the effects of selection on populations, both random mating, selfed and inbred, where the character selected depends upon several genes, and (as in the[r] ... See full document

... phenotypic selection, in which plants with superior phenotype are ...Marker-assisted selection (MAS) was then proposed as a means of discovering markers linked to quantitative trait loci (QTL) to improve ... See full document

... Using experimental populations of Arabidopsis thaliana and map-based population genetic data, we examined a multigeneration response to selection in populations with differentiated genetic ... See full document

... Experimental results indicate that: (1) relative fecundities of both sexes show density- dependent effects, (2) there is a strong density effect on male and female mat- in[r] ... See full document

... identify selection-nominated candidate genes involved in adaptation to hypoxia in one highland group, Andeans from the South American ...identified genes exhibiting preliminary evidence of recent ... See full document

... The effect of irradiation on the relative genetic loads due to detrimental and lethal genes expressed by inbreeding was studied by extracting 267 second chromosomes of Dro[r] ... See full document

... This was actually observed in the cases of all populations with the gene polished, and in monochromosomal populations with On the other hand, if the adaptive values were cha[r] ... See full document

... His results show that the mean frequency of partially recessive lethal genes is almost independent of population size except in very small populations, while the frequencies [r] ... See full document

... Although the experimental results did not show that the probability of fixation of a new mutant (recombinant) was independent of initial allelic frequency and the ef[r] ... See full document

... FIGURE 2.-Distribution of the estimates of the selection coefficients for heterozygous carriers oE lethal second chromosomes from natural populations of Drosophila pseudoobsc[r] ... See full document

... Likewise, most experiments on breeding populations have been designed to estimate the overall selective values of the genotypes, and our knowledge of how the selection i[r] ... See full document

... Through investiga- tions of lethals it is possible to study the roles played by the basic factors of population genetics: natural selection, mutation pressure, and automatic [r] ... See full document

... Results of the experimental populations indicate that the frequencies of the gene arrangements in nature are determined by natural selection, prob- ably acting throu[r] ... See full document