• Dr. Girraj Singh Meena

The paper reports the results of application of 5kr, 10kr and 15kr of gamma rays and/ or 0.02% of Nitroso Methyl Urea (NMU) on Khesari ( Lathyrus sativus ) var. P-24. The seeds of Lathyrus were treated with 5 kr, 10 kr and 15 kr doses of gamma rays and 0.02% NMU independently and in combination. Effect of these mutagens was revealed in the form of chromosomal aberrations as stickiness of chromosomes, scattered of chromosomes, ring formation at metaphase, multi polarity, formation of bridges, laggards at anaphase. It was observed that the rate of cell division was affected and measured in term of mitotic index which was decreased with the increase of doses of gamma rays. The combined treatment of physical and chemical mutagens was more effective than independent doses of both mutagens. The higher doses of gamma rays showed deleterious effect when applied separately as well as combined with NMU.

Lathyrus sativus, gamma rays, NMU, mitosis, chromosomal aberrations.

"CHROMOSOMAL ABERRATIONS INDUCED BY SEPARATE AND COMBINED APPLICATION OF GAMMA RAYS AND NITROSO METHYL UREA IN KHESARI (LATHYRUS SATIVUS) VAR. P – 24", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.536-539, April-2019, Available :http://www.jetir.org/papers/JETIR1904F85.pdf

"CHROMOSOMAL ABERRATIONS INDUCED BY SEPARATE AND COMBINED APPLICATION OF GAMMA RAYS AND NITROSO METHYL UREA IN KHESARI (LATHYRUS SATIVUS) VAR. P – 24", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp536-539, April-2019, Available at : http://www.jetir.org/papers/JETIR1904F85.pdf