isolation of two translocation homozygotes in mungbean (vigna radiata (L.) Wilczek)

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 γ-rays. When crossed with marker standard type, one translocation homozygote produced semisterile hybrid showing a chain quadrivalent + 9 bivalents while 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.