The Incidence of Polyspermy and the Number of Cortical Granules in Eggs from Juvenile and Adult Mice

概要

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The incidence of polyspermy and the number of <I>Lens culinaris</I> agglutinin reactive cortical granules were compared between the two groups of eggs; one group was from juvenile mice (30 days old) and the other from adult ones (60 to 90 days old). The incidence of polyspermy was 14.9% in juvenile mice while it was 1.2% in adult ones; the percentage from juvenile mice being significantly higher. On the other hand, the incidence of eggs containing a large number of the above mentioned cortical granules was 69.6% in juvenile mice while it was 92.9% in adult ones; the number of such eggs being significantly fewer in juvenile mice, These findings suggest that the higher incidence of polyspermy in juvenile mice is caused by an insufficient number of cortical granules in their eggs.
日本繁殖生物学会の論文