Post-Irradiation Ageing Effect on Cytological Characters of Crotalaria Saltiana

Abstract

Post-irradiation ageing effect on different cytological characters of Crotalaria saltiana were studied. Mitotic index followed no decreasing or increasing tendency based on the doses of gamma rays. Interphase chromosome volume was not found to increase with an increase of gamma rays. Percentage of pollen sterility was found to be lower in the lower doses and higher in the higher doses. Irregularities such as, formation of fragments, bridges, laggards, single and multiple chromatid bridges, unequal distribution and abnormal nuclear arrangement were recorded. This study reflects that irradiated seeds of Crotalaria saltiana showed no such dose wise effect and that might be due to ageing effect for long time.

DOI: http://dx.doi.org/10.3329/rujs.v38i0.16551

Rajshahi University J. of Sci. 38, 87-95 (2010)