Effects of Agro-Chemicals On Mitotic Chromosome Behaviour in Tetraploid and Hexaploid Wheats

Effects of fungicides (Dithane-Z-78 and Daconil-2787), insecticides (Sevin and BHC) and weedicide (2,4-D) on the somatic division in tetraploid and hexaploid wheats studied have indicated BHC to affect interphase-prophase and metaphase relatively to the maximum extent and least effects were recorded for the weedicide. The abnormalities at interphase-prophase include amoeboid nuclei, multinucleated cells and enlarged nuclei, at metaphase, euploidy, aneuploidy, mixoploidy, chromosome break and stickiness and at anatelophases, bridges, laggards, unequal distribution of chromosomes and division of pole Relatively hexaploid wheats have been found to be affected more than the tetrapoid wheats by these agro-chemicals except for 2,4-D, Sevin treatment induced multipolar situations.