Fig. 1.

Ploidy analysis in Aster amellus agg.. Histograms of relative nuclear DNA content of particular Aster amellus agg. cytotypes. Cell nuclei of the diploid Aster amellus agg. individual with known chromosome number were used as an internal standard. The x-axis constitutes relative DNA content, the y-axis number of nuclei. The G₀/G₁ peak of the diploid A. amellus agg. was on channel 187 (CV = 2·4), that of hexaploid A. amellus agg. on channel 484 (CV = 2·33); i.e. the peak ratio is 2·59.