Abstract
A study was undertaken to determine the relationship between differential amphiplasty and chromosome complements in hybrid offspring of C. capillaris×C. vesicaria ssp. taraxacifolia. In cells of offspring plants with somatic chromosome complement of capillaris and vesicaria, the satellite of 4v chromosome of vesicaria disappeared. In a plant without 1c chromosome of capillaris (2n=10=2c+3c+1v+1v+2v+2v+3v+3v+4v+4v), disappearance of the satellite of 4v chromosome was observed. The satellite of 4v chromosomes which had disappeared in F1 hybrid reappeared in the B1 offspring by eliminating the chromosomes of capillaris. Further, it was confirmed that differential amphiplasty recovered under the condition of nucleus substitution. As the result, 2c or 3c chromosome of capillaris may have induced differential amphiplasty.
