Abstract
Cytologital analysis of 65 plants regenerated from callus tissue of a common wheat (T. aestivum) in R 1 and R 2 generations revealed their mixoploid structure. Dominance of haploid cells and cells with near haploid chromosome sets in majority of these plants was observed. Aneuploid cells occured in the plants with significant frequency (from 9.9 to 84.4%). Diploid cells in the plants of 5 lines were very rare and in some cases were absent at all. The frequency of polyploid mitoses was low (up to 8.6%). Young plants regenerated from calli differed from seed plants by the growth rate, height and the number of tillers at early stages of development. Later on these differences disappeared.
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