Abstract
1) A detailed description is given in this paper, on the morphological characteristics of polyhaploid plants of S. tuberosuem (variety Deodara) (2n=24), in comparison with those of the maternal plants (2n=48) from which they arose. 2) The polyhaploids differ from Deodara in most of the characters examined, but the degree of difference varies in different characters, indicating that it is low in the qualitative characters related to shape and color and high in the quantitative ones concerned with size, number and weight. 3) It is discussed that this study gives certain suggestions for detecting polyhaploid plants of S. tuberosum from the F1 populaticns involving this species as one of the parents, and to consider the polyploid nature of S. tuberosum and the morphological relationships of the polyhaploids to wild diploid Solamum species.
