Variation in body size and life history traits in Drosophila aldrichi and D. buzzatii from a latitudinal cline in eastern Australia

Article Abstract:

Drosophila aldrichi and D. buzzatii from an eastern Australian latitudinal cline have been studied relative to thorax and wing size and life history variations. Size in general was greater going north to south. Differences in the laboratory-reared flies are likely mostly genetic. These flies had body-size traits that did not show any identifiable trend to go up with latitude. They probably reflect adaptation to specific, though unknown, environmental factors. These do not show linear latitudinal variation on the geographical scale studied.

Denmark, Body size, Body weights and measures, Adaptation (Biology), Evolutionary adaptation, Biogeography, Latitude

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Genetic architecture of a wing size measure in Drosophila hibisci from two populations in eastern Australia

Article Abstract:

Two Drosophila hibisci populations in eastern Australia have been studied relative to genetics of a wing size measure. Genetic correlation matrix for ovariole number and wing width would seem to indicate there is negative genetic correlation between additive effects on one trait and epistatic effects on the other. Evidence of genetic effects that are consistent with assumptions of Wright's shifting balance theory of evolution was seen.

United Kingdom, Evolution (Biology), Evolution, Heredity, Wings (Animal), Animal wings, Flowers, Ecological genetics, Genetic epistasis, Epistasis

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Climatic adaptation of Drosophila buzzatii populations in southeast Australia

Article Abstract:

A study was conducted to identify traits important for thermal adaptation, that is, those showing some kind of clinical variation. Clinical variation was found in 13 of the 19 traits studied in the thermal adaptation of D. buzzatii, ten of which were influenced by several of the variables used in the analysis. Results indicate a complex relationship between geographic coordinates, climatic variables and trait response.

Analysis, Physiological aspects, Acclimatization, Acclimatization (Biology)

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