Abstract
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.
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References
Sirlin, J. L., and Edwards, R. G., Nature, 179, 725 (1957).
Oakberg, E. F., Amer. J. Anat., 99, 507 (1956).
Roosen-Runge, E. C., and Giesel, L. O., Amer. J. Anat., 87, 1 (1950). Leblond, C. P., and Clermont, Y., ibid., 90, 167 (1952).
Ortavant, R., Arch. Anat. Micr. Morph. Exp., 45, 1 (1956).
Edwards, R. G., and Sirlin, J. L., Endeavour (in the press).
Swift, H. H., Physiol. Zool., 23, 169 (1950).
Oakberg, E. F., Amer. J. Anat., 99, 391 (1956).
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SIRLIN, J., EDWARDS, R. Duration of Spermatogenesis in the Mouse. Nature 180, 1138–1139 (1957). https://doi.org/10.1038/1801138a0
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DOI: https://doi.org/10.1038/1801138a0
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Duration of Spermatogenesis in the Mouse
Nature (1957)