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Adult healthy males of short horned Indian grasshopper, Spathosternum praciniferum were irradiated with gamma rays with a dose of 80r and 240r while the untreated specimens served as control. The testes material of treated and untreated specimens fixed at different time intervals were subjected to squashflame-drying-iron-alum-haematoxylin technique. The control specimens showed very negligible frequency of aberrations in some meiotic stages while the treated specimens except only the spermatogonial metaphase, the Diplotene, Diakinesis, Metaphase – I, Anaphase –I, Metaphase –II, and Anaphase – II, yielded various types of aberrations. The comparative analysis of the data showed that maximum effect was at 16 hrs. i.e. somewhat time – dependent and the marker X-chromosome was more sensitive than autosomes and that Treatment – 2 (240r) showed more aberrations (18.74%) than Treatment – 1(80r) (16.20%).

A Comparative Study of 80r and 240r Gamma Rays On Male Meiotic Chromosomes of Grasshopper Spathosternum Praciniferum