Helia, cilt.24, sa.35, ss.39-46, 2013 (Scopus)
In this study, mitotic effects of gamma rays on Ekiz 1 variety belonging to
Helianthus annuus L. (2n= 34) in the M0 (first irradiated seeds), M1 and M2
generations have been investigated. Seeds (M0) were irradiated with gamma
rays at 10, 20, 30, 40 and 50 kR doses. Percentage of total abnormalities in the
M0, M1 and M2 generations increased parallel to the increasing dose of radiation. These abnormalites have been observed as C-metaphase, chromosome
stickiness, laggards and bridges with or without fragment. Mitotic index (M.I.)
in the M0, M1 and M2 generations has decreased parallel to the dose increase.
When the generations are compared, both the amounts of decrease in mitotic
index and in the percentage of mitotic abnormalities were mostly observed in
M0.