Abstract: Abnormal behaviors were observed throughout the whole melosis process of regenerated plants (R0 from somatic cell of Triticum aestivum cv. Ningmai 3. There was variation of chromosome numbers. The type of 2n–2 was frequently found, then the type of 2n–l, while the 2n+l and 2n–4 types were rarely observed. Anomalous ph-nomena such as univalent, multivalent, lagging chromosome, chromosome bridge, fragment and micronuclei were emerged at the meiotic stage of pollen mother cells of the regenerated plants (R1). These variations were different in degree in the 5 tested genotypes.

Key words: Wheat, Regenerated plant, Chromosome variation