The reciprocal crosses between A. tuberculatus and A. esculentus were made, and in the progeny of their hybridization a new amphidiploid plant was obtained. The reciprocal crossing between them was possible, and their crossability was about 20 %; and the germination percentage of the F
1 seeds obtained was about 60-80 %. The size of the F
1 seeds obtained from the cross A. tuberculatus x A. esculentus was similar to that of A. tuberculatus ; and that obtained from the cross A. esculentus x A. tuberculatus were intermediate between their parents.
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