Comparative Radiosensitivity of Different Varieties of Impatiens balsamina L.

抄録

Comparative radiosensitivity of five varieties of Impatiens balsamina has been studied. Different parameters like germination/survival, growth, meiotic anomalies, pollen fertility and seed setting were taken into consideration. Response of varieties to germination survival and growth parameters was fairly uniform, but not so with regard to other parameters. A new approach for comparing radiosensi-tivity has been discussed. Stimulatory effect of radiation on chiasma frequency and seed setting in one of the variety has been reported. Insignificant difference in INV and ICV of five varieties have been reported. ICV appears not to reflect on the radiosensitivity. Genotypic constitution is responsible for the varietal difference in radiosensitivity. Study of trisomic in M₂ has been presented.