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Étude des Gonades des Intersexués Triploïdes de Drosophila Melanogaster. Description Morphologique Ontogenese des Structures Histologiques.

Étude des Gonades des Intersexués Triploïdes de Drosophila Melanogaster. Description... SUMMARY Five categories may be distinguished in the gonads of adult intersexes, according to morphological characters. The study of larvae, pupae and adults showed that these five categories arose from three fundamental types of histological structures: testes, ovaries, mosaïcs. Identifying of intersexual gonads is depending on chronology of the development of true male testes and that of true female ovaries. No intersexual gonad gives evidence in favour of a sexual reversal with transformation from male into female. Intersexual gonads are determined from the beginning; there is no turning point. These results corroborate experimental ones. Testes of 3A.2X intersexes develop spermatids, those of 3A.2X.Y intersexes develop spermatozoa. All these cells are abnormal. Moreover, primary spermatocytes of 3A.2X intersexes have crystal needles. Most of ovarian follicles contain cystocytes. These cells increase in number by mitosis, even in aging adults. Trophocytes and spermatocytes differentiate, the last ones only in ovaries of adults 5 days old or more. The fonction of the whole intersexual ovaries is anarchic. Vitellogenesis is possible, but exceptional. There are two kinds of mosaïcs. The first are « ovary + testis »; here, the two parts have independant fate. The second are « ovary + seminal vesicle ». Gonia go out from the gonads of pupae; they stay in body cavity. In intersexes with ovaries, free cystocytes give important groups. In intersexes with mosaïcs, cystocytes are less numerous and differentiated into primary spermatocytes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annales de la Société entomologique de France (N S ) Taylor & Francis

Étude des Gonades des Intersexués Triploïdes de Drosophila Melanogaster. Description Morphologique Ontogenese des Structures Histologiques.

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Publisher
Taylor & Francis
Copyright
© 1969 Société entomologique de France
ISSN
2168-6351
eISSN
0037-9271
DOI
10.1080/21686351.1969.12277774
Publisher site
See Article on Publisher Site

Abstract

SUMMARY Five categories may be distinguished in the gonads of adult intersexes, according to morphological characters. The study of larvae, pupae and adults showed that these five categories arose from three fundamental types of histological structures: testes, ovaries, mosaïcs. Identifying of intersexual gonads is depending on chronology of the development of true male testes and that of true female ovaries. No intersexual gonad gives evidence in favour of a sexual reversal with transformation from male into female. Intersexual gonads are determined from the beginning; there is no turning point. These results corroborate experimental ones. Testes of 3A.2X intersexes develop spermatids, those of 3A.2X.Y intersexes develop spermatozoa. All these cells are abnormal. Moreover, primary spermatocytes of 3A.2X intersexes have crystal needles. Most of ovarian follicles contain cystocytes. These cells increase in number by mitosis, even in aging adults. Trophocytes and spermatocytes differentiate, the last ones only in ovaries of adults 5 days old or more. The fonction of the whole intersexual ovaries is anarchic. Vitellogenesis is possible, but exceptional. There are two kinds of mosaïcs. The first are « ovary + testis »; here, the two parts have independant fate. The second are « ovary + seminal vesicle ». Gonia go out from the gonads of pupae; they stay in body cavity. In intersexes with ovaries, free cystocytes give important groups. In intersexes with mosaïcs, cystocytes are less numerous and differentiated into primary spermatocytes.

Journal

Annales de la Société entomologique de France (N S ) – Taylor & Francis

Published: Apr 30, 1969

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