On the Interspecific Hybridization between the Adzuki Bean. Phaseolus angularis (WILLD) W.F. WIGHT and the Green Gram, P. radiatus L. II. On the Characteristics of Amphidiploid in CI Generation from the Cross Green Gram x Rice Bean, P.calcaratus ROXB

Abstract

In order to restore the cornplete sterility of F₁ hy-brids from the cross Phaseolus radiatus L. cv.“Merryokuto”× P.calcaratus ROXB, endemic narne“Bakaso”, colchicine ranolin method (0.1%) was applied to the buds of 10 F₁ clones, and 14 seeds were obtained from one clone treated. Then, the 11 amphidiploid plants in C₁ generation were com-pared with the parents and F₁s from morphological and cytological viewpoint. Incidentally speaking, though“Bakaso”was treated as a semi-wild relative of the adzuki bean in my previous paper (1973), it was later identified with a local variety of rice bean, P.calcaratus ROXB.