THE GENETIC STRUCTURE OF NATURAL POPULATIONS OF DROSOPHILA MELANOGASTER. IV. HETEROZYGOUS EFFECTS OF RADIATION-INDUCED MUTATIONS ON VIABILITY IN VARIOUS GENETIC BACKGROUNDS

Genetics ◽  
1966 ◽  
Vol 53 (3) ◽  
pp. 513-527 ◽  
Author(s):  
Terumi Mukai ◽  
Isao Yoshikawa ◽  
Kikue Sano
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Structure ◽  
Natural Populations ◽  
Induced Mutations ◽  
Radiation Induced ◽  
Effects Of Radiation

scholarly journals EVIDENCE FOR COADAPTATION: NEGATIVE CORRELATION BETWEEN LETHAL GENES AND POLYMORPHIC INVERSIONS IN DROSOPHILA MELANOGASTER

Genetics ◽  
1976 ◽  
Vol 82 (4) ◽  
pp. 697-702
Author(s):  
Takao K Watanabe ◽  
Tsuneyuki Yamazaki
Keyword(s):  
Drosophila Melanogaster ◽  
Negative Correlation ◽  
Position Effect ◽  
Natural Populations ◽  
Underlying Mechanism ◽  
Gene Arrangement ◽  
Induced Mutations ◽  
And Inversion ◽  
Lethal Genes ◽  
New Mutations

ABSTRACT Through examination of all available data on lethal and inversion frequencies on the second chromosome in natural populations of Drosophila melanogaster, we have discovered that there is a clear negative correlation between the two quantities. Lethal genes are located more densely on the regions of standard gene arrangement than the inverted regions, and this accounts for the negative correlation. To reveal the underlying mechanism of the phenomena, we have carried out an experiment and found that effect of EMS-induced mutations on the inversion-carrying chromosome is more severe than that on the standard chromosome. We interpret these results as evidence for coadaptation or position-effect within the inversion chromosomes. New mutations within the coadapted gene complex are quickly eliminated from the population and polymorphic inversions are kept free of mutants through selective elimination.

scholarly journals A SEASONAL SURVEY OF THE GENETIC STRUCTURE IN NATURAL POPULATIONS OF DROSOPHILA MELANOGASTER

1969 ◽  
Vol 44 (4) ◽  
pp. 247-258 ◽  
Author(s):  
KAZUHIKO KOSUDA ◽  
OSAMU KITAGAWA ◽  
DAIGORO MORIWAKI
Keyword(s):  
Drosophila Melanogaster ◽  
Genetic Structure ◽  
Natural Populations
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