Effects of temperature and X-ray irradiation on intrinsic growth rate in populations ofDrosophila pseudoobscura (original) (raw)

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Abstract

An experiment was designed using populations of_Drosophila pseudoobscura_ with different gene arrangements on the third chromosome, to study the effects of various temperatures and different dosages of radiation on the innate capacity for increase.

The innate capacity for increase was found to increase with temperature and decrease with higher in radiation dosages. The mean generation length showed a decline with both treatments with a greater decrease in the former treatments.

Net reproductive rate showed a decrease in both cases while the finite rate of increase (λ) showed an increase in the temperature experiment and a decrease in the radiation experiment.

Percentage contribution of each age group to the rate of muliplication per generation depends on temperature and dosages of radiation as well as the genetic background of the population.

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Authors and Affiliations

1. Faculty of Agriculture, University of Alexandria, Alexandria, Egypt, U.A.R.
   A. O. Tantawy

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1. A. O. Tantawy
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Tantawy, A.O. Effects of temperature and X-ray irradiation on intrinsic growth rate in populations of_Drosophila pseudoobscura_.Genetica 34, 34–45 (1964). https://doi.org/10.1007/BF01664177

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• Received: 20 September 1962
• Issue Date: December 1964
• DOI: https://doi.org/10.1007/BF01664177

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