MEIOTIC STUDIES IN THE M2 GENERATION OF Helianthus annuus L. VARIETY EKIZ 1 AFTER GAMMA IRRADIATION / LOS ESTUDIOS EN LA GENERACION DE Helianthus annuus L. LA VARIEDAD EKIZ 1 DESPUES DE LA IRRADIACION DE LA GAMMA / APRÉS LE RAYONNEMENT DES GAMMA DANS LA GÉNÉRATION M2 DE LA VARIÉTÉ EKIZ 1 (Helianthus annuus L.)

Abstract

SUMMARYThe effect of gamma rays on meiosis in the M2 generation has been studied in sunflower (Helianthus annuus L.) variety Ekiz 1. Seeds were irradiated with gamma rays at 10, 20, 30, 40 and 50 kR doses. Radiation induced meotic abnormalities. The chromosomal aberrations included univalents, multivalents and stickiness at diakinesis, laggards and stickiness at metaphase I, bridges and laggards at anaphase and telophase I-II, micronuclei at telophase II. The percentage frequencies of anomalies increased generally with the increasing dose of radiation.