ISOLATION OF TWO TRANSLOCATION HOMOZYGOTES IN MUNGBEAN (VIGNA RADIATA (L.)WILCZEK)

Abstract

Two translocation homozygotes were isolated in M2 generation of two semisterile lines raised from seeds of mungbean variety NP 28 irradiated with interrupted 60 kR y-rays. When crossed with marker standard type, one translocation homozygote produced semisterile hybrid showinga chain quadrivalent+9 bivalentswhile the other translocation homozygote gave rise to semisterile hybrid with a ring quadrivalent + 9 bivalents. The translocation homozygotes, when intercrossed, produced highly sterile hybrid showing two quadrivalents (one chain, one ring) +7 bivalents, indicating that the chromosome pairs involved in interchange in the two lines were different.