Abstract
IT is proposed here to outline some recent biological and cytological studies in experimental parthenogenesis. The rearing of reproductive parthenogones and parthenogenetic strains after experimental treatment has been achieved only once. The Russian worker, Astaurov1, after subjecting unfertilized ovarian or newly laid eggs of the silk-moth, Bombyx mori, to increased temperature, obtained adults from which descended three successive parthenogonic generations. Out of 25,770 caterpillars only 11 were males. His work developed from Sato's2 in Japan, adults of both sexes, males predominating, being obtained after the use of hydrochloric acid or other chemicals. As the female in Lepidoptera is the sex-determining sex, these different results are possibly due to the different agents affecting differently the sex-determining mechanism in the eggs, or to physiological conditions, for example, degree of maturity, in the different eggs.
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PEACOCK, A. Recent Work on Experimental Parthenogenesis*. Nature 144, 1036–1038 (1939). https://doi.org/10.1038/1441036a0
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DOI: https://doi.org/10.1038/1441036a0
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