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The Journal of Heredity 1983:74(4):283-288
© 1983 The American Genetic Association 74:283-288

research-article

Evidence for assortative mating systems related to the polytene chromosome-band polymorphism in Sciara ocellaris

A. L. P. Perondini, P. A. Otto, A. R. Templeton, and A. Rogatko

Departmento de Biologia, Universidade de Säo Paulo Caixa Postal 11461. 05421 Säo Paulo, SP, Brazil
Department of Biology. Washington University St. Louis, MO 63130

Abstract

Studies on the mating systems of Sciara ocellaris maintained in a population cage for one year (13–14 generations) revealed that flies mate assortatively for 9 out of 15 single polytene chromosome-band variants commonly found in this species. The null hypothesis of random mating could not be rejected for five of the remaining six bands, and for one band none of the systems of mating examined fit the data. The significance of these facts for the maintenance of the cytological visible gene variability in Sciara ocellaris is discussed.


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