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The Journal of Heredity 1986:77(5):359-360
© 1986 The American Genetic Association 77:359-360

other

Desiccation resistance in two species of Drosophila

Louis Levine, Robert F. Rockwell, and Michael J. Laverde

The authors are affiliated with the Department of Biology, City College of New York, Convent Avenue at 138th Street, New York, N. Y. 10031. This research was supported in part by U.S. Department of Health and Human Services, PHS grant 2-S07-RR07132 and by a grant from the City University of New York PSC-CUNY Research Award Program to Louis Levine. The senior author would like to dedicate this paper to the memory of Olga Pavlovsky: patient teacher, understanding friend, and wonderful human being. So many of us, students of Th. Dobzhansky, owe Olga a great deal.

Abstract

Three populations of Drosophila pseudoobscura, each one represented by 12 isofemale lines, and one laboratory strain of D. melanogaster were tested for desiccation resistance at two time periods. Except in the case of one population of D. pseudoobscura, the ability to withstand drying was significantly greater in females than in the corresponding males. The males of the three populations of D. pseudoobscura differed significantly among themselves in their resistance to desiccation, as did the females. The females of D. melanogaster exhibited a consistently higher survival rate than those of D. pseudoobscura, but not the males. These results are discussed with reference to the third chromosome inversion polymorphism of D. pseudoobscura and the cosmopolitan distribution of D. melanogaster.


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