Genetical Research

Polymorphism of M factors in populations of the housefly, Musca domestica L., in Turkey

S. ÇAKIR a1c1 and A. KENCE a2
a1 Faculty of Art and Science, Biology Department, Kirikkale University, 71100 Kirikkale, Turkey
a2 Department of Biology, Middle East Technical University, 06531 Ankara, Turkey


M factors, which determine maleness in Musca domestica, were found on the second, third, fourth and fifth linkage groups in housefly populations of Turkey. As in European populations, the male-determining factor was more frequently located on linkage group III (MIII). Some males homozygous or double heterozygous for M factors were identified. Deviations from a 1[ratio]1 sex ratio in favour of males, as well as mosaics for somatic marker mutations and sexual mosaics (gynandromorphs), were also observed. The results reveal an extensive polymorphism in the sex-determining system.

(Received April 26 1999)
(Revised October 14 1999)

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