Duration Of Spermatogenesis Research Articles

Duration of spermatogenesis in the mouse.

WE wish to comment on Dr. Oakberg's criticism of our communication1. We stated there that the transcription of frequency of tubule stages from rat to mouse could provide only “approximate intervals”. However, when our communication was written, Oakberg's paper on the timing of spermatogenic stages in the mouse2 was not available to us, and we had to extrapolate from the rat3 on the assumption that spermatogenesis in these species was similar : this we clearly stated1. We realized, therefore, that only “reasonable agreement” could be expected between the cytological and tracer results as we presented them, and that work similar to that of Ortavant in the ram4 gives a clearer indication of the duration of spermatogenesis5. Furthermore, Oakberg has obviously overlooked the assumption, based on the work of Swift6, that we made in our calculations on the tracer results1, namely, that preleptotene spermatocytes were initially labelled by adenine.

Duration of spermatogenesis in the mouse.

A RISE in frequency of dominant lethals in matings at successive intervals during the first few weeks after irradiation of male mice has been observed by Brenneke1 and Hertwig2 for X-rays, and by Russell et al.3 for neutrons. Thus Bateman's4 results with exposure to 200 r. of X-rays confirm the earlier observations. Bateman's4 interpretation of his data and the subsequent discussions by Auerbach5 and Sirlin and Edwards6 concern the determination of the stage in which gametes available at successive weeks were irradiated. As emphasized by Auerbach5, and now accepted by Bateman7, Bateman's results4 do not contradict the essentially parallel response of mice and Drosophila that had been partially demonstrated in the earlier work. However, in spite of the attention this subject now has received, several points need clarification, especially in relation to the description and timing of normal Spermatogenesis in mice.

Duration of spermatogenesis in the mouse and timing of stages of the cycle of the seminiferous epithelium.

Duration of spermatogenesis in the mouse and timing of stages of the cycle of the seminiferous epithelium.

Quantitative studies on spermatogenesis in the albino rat. II. The duration of spermatogenesis and some effects of colchicine.

Quantitative studies on spermatogenesis in the albino rat. II. The duration of spermatogenesis and some effects of colchicine.