STUDIES ON BREEDING OF SWEET POTATO VARIETIES ADAPTED TO DIRECT PLANTING. : 1. Breeding Process and the Main Characters of Chugoku 18 and Chugoku 25.

Abstract

Selection process and main characters of two strains selected for direct planting were described. Chugoku 18 and Chugoku 25, which are different in root type, root size and growth habit, would provide new point of view in the direct planting cultivation of sweet potato.