PMID: 16523657Mar 10, 2006Paper

Fertility of Drosophila melanogaster females affected by mutation l(2)M167DTS

Ontogenez
A M Kulikov, E N Miasniankina

Abstract

We studied the fertility of D. melanogaster females heterozygous for the dominant temperature sensitive mutation l(2)M167DTS, which exerts a recessive lethal effect at 25 degrees C, under the conditions of stable temperature regimes 25, 28, and 29 degrees C and changing regimes 25-->29 degrees C and 29-->25 degrees C. It was shown that inhibition of total activity of oogenesis due to a decreased number of functioning ovarioles is one of the mechanisms underlying the decreased fertility of l(2)M167DTS /+ females. Analysis of individual fertility of each female confirmed also the role of sterility as a component of fertility of the females. Sterilization was realized due both to full depletion of functioning ovarioles and disturbed mechanism of laying the mature eggs onto a substrate as a result of violation of the feedback blocking normal ovulation, which led to the breakdown of ovarioles and filling of the abdominal cavity with mature oocytes. A significant polymorphism of heterozygous females by their fertility was observed. The intensity of sterilization and mortality of l(2)M167DTS/+ females sharply increased at an elevated temperature (29 degrees C), especially at the pupal stage.

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