Abstract
This paper deals with the genetic segregation of gynodioecious individuals found in a strain of castor-bean, Ricinus communis L. Some pedigrees from the natural pollination of these individuals segregated female plants in various grades as seen in Table 1. In one case, tehe prcentage became about 48. From the selfing of nomal individuals in these pedigrees, females were resulted as 15% (Table 2). On the other hand, many of the previous females were also pollinated by the pollen from the normal individuals in the same pedigree. The F1, thus obtained, segregated females denoting 36% as in Table 3. From these results it was mentioned that the female just acted as a simple recessive factor.
