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GAMMA RAY - INDUCED MITOTIC ABNORMALITIES IN Helianthus annuus L. VARIETY EKIZ 1 / LOS RAYOS DE GAMMA CAUSA ANORMALIDADES MITOTICAS EN Helianthus annuus L. VARIEDAD DE EKIZ 1 / LES ANORMALITÉS MITOTIQUES CHARGÉÉS DES RAYONS GAMMA

Author:
Arslan, Orhan, Bal, Şenol, Venice, Nilgün, Mirici, Semra
Source:
Helia 2013 v.24 no.35 pp. 39-46
ISSN:
2197-0483
Subject:
Helianthus annuus, chromosomes, gamma radiation, mitosis, seeds, stickiness
Abstract:
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.
Agid:
4812274