01782naa a2200241 a 450000100080000000500110000800800410001902400440006010000180010424501140012226000090023652010650024565000200131065000250133065000190135565000110137465000170138565300270140265300090142965300180143865300230145677300610147915229262023-03-31       1956    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/BF029827792DOI1 aROBERTSON, A.  aThe effect of selection against extreme deviants based on deviation or on homozygosis.h[electronic resource]  c1956  aAbstract: The genetic consequences of selection of intermediates or extremes for metric characters has been analysed- Selection of intermediates leads to fixation and selection of extremes (disassortative mating) will lead to a stable genetic situation with intermediate gene frequencies. The selection of intermediates is similar to the higher natural fitness of metric . intermediates often found in nature. The alternative model for the latter situation, in which the extremes hare a low fitness because they are homozygotes, was also analysed. It was found that several different phenomena could be interrelated on this model?the relationship of fitness to deviation both in the equilibrium population and after artificial selection, the decline in fitness after such selection and the rate of return to the equilibrium position when selection was suspended. The constant integrating these, called the homo-eostatic strength of the character, is related to the mean fitness of homozygotes compared to that of heterozygotes at the individual loci concerned.  aAnimal genetics  aArtificial selection  aGene frequency  aAnimal  aMelhoramento  aEquilibrium Population  aGese  aHeterozygotes  aRestricting Parent  tJournal Geneticalgv. 54, n. 236, p. 236-248, May, 1956.