Abstract
Interchange complex involving full complement of chromosomes was induced in Sesbania aculeata Poir. through gamma irradiation. The association of twelve chromosomes was realized in 11.1 per cent cells in M3 generation and rest of the cells were characterized by break up of the complex into smaller units of different sizes and shapes. Low frequency of complete association, together with interstitial chiasma formation and lower terminalization coefficient of interchange heterozygotes indicated the small size of interchange segments.Predominant non-disjunctional orientation, unequal disjunction and break up of large complex into small units led to high percentage of inviable gametes as indicated by low pollen stainability.
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