DISRUPTIVE SELECTION ON BODY WEIGHT IN DROSOPHILA MELANOGASTER
نویسندگان
چکیده
منابع مشابه
Disruptive Selection on I-Maze Activity in DROSOPHILA MELANOGASTER.
YMPATRIC speciation as one theoretical consequence of disruptive selection has not gained wide acceptance due, in part, to the paucity of laboratory evidence confirming the efficacy of this process. Only one study to date (THODAY and GIBSON 1962) has shown reproductive isolation as a result of disruptive selection on a meristic trait (sternopleural chaeta number in Drosophila melanogaster) ; at...
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Disruptive and stabilizing selection were applied to thorax and wing length in Drosophila melanogaster. Disruptive selection with negative assortative mating (D(-)) practiced on thorax length caused a large increase of the phenotypic variance; practiced on wing length the increase was less striking. Disruptive selection with random mating (D(R)) caused in most lines only a temporary increase in...
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The effect of genotype-temperature interactions on body weight has been studied in a natural population of Drosophila melanogaster using four isogenic strains derived from it, and their hybrid F(1) and F(2) progenies. Measurements were made at four constant temperatures-25 degrees , 21 degrees , 17 degrees and 13 degrees C-and at a temperature oscillating between 17 degrees and 25 degrees C.-Lo...
متن کاملSelection on wing allometry in Drosophila melanogaster.
Five bivariate distributions of wing dimensions of Drosophila melanogaster were measured, in flies 1) subjected to four defined environmental regimes during development, 2) taken directly from nature in seven U.S. states, 3) selected in ten populations for change in wing form, and 4) sampled from 21 long inbred wild-type lines. Environmental stresses during development altered both wing size an...
متن کاملThe effects of disruptive and stabilizing selection on body size in Drosophila melanogaster. II. Analysis of responses in the thorax selection lines.
An analysis was made of changes in mean and variance in some thorax selection lines. The decrease of mean thorax length in the stabilizing selection lines (S) was a consequence of a directional selection component, caused by the skewness of the frequency distributions. The slight or temporary increase of the phenotypic variance and the large increase of the mean value in the disruptive selectio...
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ژورنال
عنوان ژورنال: Evolution
سال: 1986
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1986.tb00469.x