Abstract
It was reported preliminarily that the triploid mulberry plant (3n=42) was obtained by crossing the female flower with diploidized egg cell caused by the treatmcnt of 0.2% colchicme aqucous solutron and normal pollens. Out of 190 scecllings survived from O.2% colchrcme treatment only one was found to be triploid in somatrc cells. In the induced triploid leaves the size of stomata was larger and the distribution density of them was lower than its parents.
