Le potentiel reproducteur des adultes de drosophila melanogaster: Variations génétiques en réponse aux régimes lumineux
✍ Scribed by R. Allemand
- Publisher
- Springer Netherlands
- Year
- 1977
- Tongue
- English
- Weight
- 485 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0016-6707
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✦ Synopsis
The number of eggs oviposited, the egg hatchability and the number of offspring produced were measured at 25°C under three light regimes: LL, LD t2 : 12, DD. Two wild genotypes were studied at the same time: a French strain (Colmar) and a tropical African genotype obtained by crossing two strains from Brazzaville and LibreviUe. These data were compared to those previously obtained with F~ heterozygotes between two inbred laboratory strains (vestigial x Champeti6res, Allemand et al., 1976).
Significant differences between strains were observed for all the characters considered. Moreover, the responses to the light regimes changed with the genotypes and the characters studied (see Table 2 and Fig. 3) thus demonstrating their genetic independence. In the cases where the treatments had a significant effect, the maximum total egg production was observed in darkness while the maximum egg-hatchability took place under LD 12 : 12. Possible genetic variation within species should always be taken into account in ecophysiological studies.