Abstract
The anthocyanin color of the apiculus, in the Japonica rice varieties, are caused by the existence of three genes, C (chromogen for anthocyanin), A (anthocyanin activator) and P (completely colored apiculus). In the Indica rice varieties, no definite information with respect to the applicability of this genic scheme has been existent. However, it is said that, as far as anthocyanin color of apiculus is concerned, the Indica and the Japonica rice varieties have at least the basic gene system in common.