Article Abstract:
Cross-environment correlations in traits in larval and in adult Drosophila buzzatii exposed or not exposed to one heat-stress bout are discussed as they relate to evolutionary effects of stress to populations. All life-history traits varied significantly among isofemale lines, of which 100 were studied for survival in benign conditions, larval-development time, longevity and fecundity, and it can be seen that even small stress increases in the environment can have profound effects on evolutionary relationships of life-history traits.
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Article Abstract:
The authors have carried out the study on cactophilic Drosophila buzzatii. They report that they have tested the effects of second chromosome inversions on shape and body size across the natural breeding substrates, and that the results support the hypothesis that size-related traits and wing loading have a genetic basis associated with inversion polymorphism.
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Article Abstract:
A genetic (chromosomal) analysis of the variation of the number of abdominal spots in D. mediopunctata is presented. The results show that the idea that the factors or genes determining a conspicuous polymorphism are likely to be associated, forming a supergene and this association would be most efficiently accomplished through a chromosome inversion.
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