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Male fertility in a female-sterile mutant ofDrosophila melanogaster

โœ Scribed by Trippa, G. ;Loverre, A. ;Cicchetti, R.

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
686 KB
Volume
214
Category
Article
ISSN
0022-104X

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โœฆ Synopsis

Abstract

The fertility and the fecundity of males homozygous for the recessive femaleโ€sterile factor fs(2)^TLM^ have been investigated. Both for standard mating and for observed mating procedures, there was a more than 35% male sterility. Moreover, in a total fecundity experiment the fertile males (about 70%) were effectively fertile for a shorter time than the control males, and the mean progeny per male was about a third that of the controls.

It can thus be concluded that the penetrance of the fs(2)^TLM^ factor is different in the two sexes, being complete in the females and incomplete (0.35) in the males. Furthermore, in the males it shows two different degrees of expressivity: complete sterility and fecundity lowered by about 70%.

It is suggested that the resultant sterility of these males is a consequence not merely of altered processes causing testicular abnormalities, but also of independent events directly affecting spermatogenesis.

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