Cytogenetic disorders of winter wheat root meristem cells under the action of moderate and high concentrations of N-nitroso-N-methylurea

Aim. To study the frequency and spectrum of cytogenetic disorders in Triticum aestivum L., induced by effect moderate high concentrations N-nitroso-N-methylurea. Methods. The seeds winter wheat cultivars Albatros odeskyi Zymoiarka were treated with water solution N-nitroso-N-methylurea such as 0.005 %, 0.01 0.025 %. A analysis cells a root meristem was made help an anatelophase method. Results. mitoses chromosome aberrations amounted to 2.74–23.05 it depended on concentration mutagen plant genotype. significant increase aberrant recorded result which associated radiometric impact caused influence chemical concentration. contained mostly acentric fragments, bridges chromatid type chromosomes lagged behind. As super-mutagen increased, expansion took place at expense even micro-nuclei rings. Conclusions. aberrations, NMU, exceeds control level 3.5–39.7 times, depends directly mutagen. equal % shows classifies mentioned amount one. serious indicator number per cell appeared be typical only when under highest