Thermal induction of diploid gynogenesis
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چکیده
Sporadic diploid gynogenetic fry resulted from fertilization with y-irradiated sperm. Their frequency increased appreciably when thermal shock treatments, beginning during the first hour of development (―0.4 OC lasting 6 hrs 45 min ; 26-30 °C lasting 10 min), were used. When the eggs were fertilized with normal sperm, a good triploidization rate was induced by means of heat shocks (27-30 °C lasting 10 min). It is supposed that the retention of the second polar body caused the gynogenetic diploidy observed.
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