Cytogenetic effects
of gamma radiation-induced seed extracts of Panicum miliaceum L. on the somatic
chromosomes of Allium cepa L.
Amitha Nanggia R. and Manimozhi V.
Res. J. Biotech.; Vol. 20(6); 25-30;
doi: https://doi.org/10.25303/206rjbt025030; (2025)
Abstract
Studies on the interaction between biological systems and Gamma radiation have been
used as an efficient approach for determining both its beneficial and damaging effects.
The present study was carried out to assess the induced Gamma irradiation effects
on cytogenetic parameters in proso millet (Panicum miliaceum L.) variety CO(PV)
5 by exposing the seeds to Gamma source - Cobalt-60 (60Co) at doses ranging from
50, 100, 150 and 200 Gy.
The results of cytological studies with Allium cepa bioassay revealed a wide range
of chromosomal aberrations viz. stickiness, bridges, laggards, fragments, nuclear
lesions, binucleated cells, precession, promiscuous chromosomes, disoriented oblique
spindles and chromosome degeneration. The study concluded that the results were
concentration-dependent, time-dependent and Gamma-dose-dependent.
