コイ科魚類における交雑実験-I : タモロコとモツゴの正逆交雑

概要

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1) Artificial intergeneric hybrids, Gnathopogon elongatus elongatus ?? ×Pseudorasbora parva ?? and the reciprocal, are reared to the adult stage with the similar survival rate to the controls. 2) The hatching times of cross bred eggs are nearly intermediate between those of the two parental forms, Furthermore, F1 hybrids are not only intermediate morphologically but also have an intermediate spawning behavior and produce eggs intermediate between their parental forms in external characters. 3) The both of the F2 and the backcross hybrids can be produced. though all of them die before hatching.