Fertility of Drosophila melanogaster females affected by mutation l(2)M167 DTS

Fertility of Drosophila melanogaster females affected by mutation l(2)M167 DTS We studied the fertility of D. melanogaster females heterozygous for the dominant temperature sensitive mutation l(2)M167 DTS , which exerts a recessive lethal effect at 25°C, under the conditions of stable temperature regimes 25, 28, and 29°C and changing regimes 25 → 29°C and 29 → 25°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)M167 DTS /+ 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)M167 DTS /+ females sharply increased at an elevated temperature (29°C), especially at the pupal stage. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Fertility of Drosophila melanogaster females affected by mutation l(2)M167 DTS

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Copyright © 2006 by Pleiades Publishing, Inc.
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
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