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The Journal of Heredity 1985:76(4):295-300
© 1985 The American Genetic Association 76:295-300

research-article

Argentophilic structures of spermatogenesis in the yellow fever mosquito

M. A. Motara, S. Pathak, K. L. Satya-Prakash, and T. C. Hsu

The authors are affiliated with the Department of Genetics, the University of Texas M.D. Anderson Hospital and Tumor Institute, Houston, Texas, 77030. This research was supported, in part, by grant R808582 from the U.S. Environmental Protection Agency. The senior author is on sabbatical leave from the Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa, and wishes to thank the University Research Division, C.S.I.R., Pretoria and Rhodes University for providing financial assistance to undertake this study. He also thanks Dr. G. R. Holmquist, Baylor College of Medicine, Houston, for permitting him the time away from his laboratory to pursue this study. Please address reprint requests to Dr. S. Pathak, Section of Cellular Genetics, Box HMB 181, M.D. Anderson Hospital and Tumor Institute, Houston, Texas, 77030.

Abstract

Application of the silver-staining technique to air-dried chromosome preparations of the yellow fever mosquito, Aedes aegyptl, revealed the following: 1) Intensely stained perlcentromeric regions in all chromosomes including the Y chromosome in spermatogonla, and during the primary and secondary spermatocytes; 2) the presence of prepachytene that were not reported earlier; 3) a nucleolus organizing region that persisted up to the late pachytene stage; and 4) rod or ring-like centrioles in pachytene and diplotene stages. In addition, varying numbers (1–4) of silver-stained, ring-like structures were observed during spermiogenesis. The exact nature and function of these ring-like structures is not understood.


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