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Science 12 April 1968:
Vol. 160. no. 3824, pp. 199 - 200
DOI: 10.1126/science.160.3824.199
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Articles

Selection for Higher Fitness in Populations of Drosophila pseudoobscura

Dragoslav Marinkovic 1

1 Rockefeller University, New York, and Faculty of Science, University of Belgrade, Belgrade, Yugoslavia

Four laboratory populations, each consisting of flies homozygous for a wild second chromosome, were maintained in population cages. Three of them were initially characterized by low fecundity of the females; the fourth was a control. After 15 months, in all three populations with low fecundity this character was much improved; two of them, have reached the control level. The changes observed were presumably due to mutation and selection under highly competitive conditions.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)