Relation Between Numbers of B-Chromosomes and C-Bands in Allium schoenoprasum L

抄録

The relation between the numbers of B-chromosomes and C-bands was examined in 7 populations of Allium schoenoprasum from eastern North America. Correlations between those two variables were positive and significant both over all plants studied (n=68) and for population means (n=7). However, excluding either the two populations devoid of B-chromosomes or all plants without B-chromosomes, these correlations were not significant. Within the 5 populations possessing B-chromosomes, correlations between C-bands and B-chromosomes ranged from 0.47 to -0.50, but none reached significance levels. These results are discussed in relation with those reported for Ornithogalum montanum, where a strong negative association between numbers of B-chromosomes and Q-bands has been reported.