Meiotic Aberrations Induced by Varying Doses of Gamma Radiations in Coriandrum sativum L.
Bilques Aashiq
School of Agricultural Science, Glocal University, Mirzapur Pole, Saharanpur-247121, India.
Rayees Afzal Mir *
School of Agricultural Science, Glocal University, Mirzapur Pole, Saharanpur-247121, India.
Mohd Gulfishan
School of Agricultural Science, Glocal University, Mirzapur Pole, Saharanpur-247121, India.
*Author to whom correspondence should be addressed.
Abstract
With 2n=22 chromosomes, coriander (Coriandrum sativum L.) is a significant spice and vegetable crop as well. Five distinct irradiation doses (100, 200, 300, 400, and 500Gy) were applied to dry and healthy coriander seeds in order to evaluate the effects of radiation. A broad range of meiotic defects were seen in the gamma-irradiated seed offspring, with uni and multivalent, laggards and stickiness of chromosomes, stray bivalents, bridges, and micronuclei being the most common. Chromosome dispersion, disrupted polarity, and premature chromosomal migration are among the other abnormalities found. Compared to anaphase/telophase, the entire range of these meiotic anomalies was shown to be greater during metaphase. Furthermore, a positive association was seen between the magnitude of aberrations and the rising dose of gamma irradiation. Furthermore, gamma radiation dosages also reduced the percentage of plant survival and seed germination. It was discovered that radiation doses between 200 and 300Gy were advantageous in causing quick cytogenetic changes and average mortality, which may be helpful in upcoming cytological and mutant breeding programs.
Keywords: Gamma rays, meiotic abnormality, coriander, germination, plant survival, chromosome