The competitive ability and fitness components of the methoprene-tolerant (Met) Drosophila mutant resistant to junenile hormone analog insecticides
Article Abstract:
Drosophila melanogaster may become resistant to methoprene, a juvenile hormone (JH) analog, via mutations in the Met locus. Although mutations in thislocus is expected to result in an inability to regulate JH, previous results show that Met mutants are highly fecund. Because of these findings, the fitnessof Met flies was carefully studied. The results showed that Met flies are positively selected in the presence of methoprene, but are out-competed by the wild type in its absence. Furthermore, although Met mutants have a disrupted JHregulatory system, the mutants remain viable and reproductive.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
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Components of genetic variation in a natural population of Drosophila mercatorum
Article Abstract:
The levels of genetic variation for the three major molecular components of abnormal abdomen (aa) in Drosophila mercatorum were measured. Selective underreplication, R1 inserts and Y chromosomes with and without D bands components were noted to be highly polymorphic in D. mercatorum natural populations. The two X-linked components displayed a large number of variations in the natural population of D. mercatorum and were randomly associated. These two components were also found to form a supergene comples that regulated the aa expression in females.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
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Polygenic mutation in Drosophila melanogaster: the causal relationship of bristle number to fitness
Article Abstract:
The technique of divergent artificial selection for about 150 generations and arbitrary mating for 180 generations is used for determining the relationship between abdominal bristle number and sternopleural bristle number in Drosophila melanogaster. The bristle number for replicate selection lines is found to be larger than that of the lines maintained without artificial selection. The unselected lines exhibit an average fitness level which is higher than that of the selection lines.
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1995
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