Table 3.

The base and variant types of chromosomes bearing or lacking 5S rDNA (red) and 25S rDNA (green) loci in the genomes of Brassicaceae species

Differences in size of these chromosome types and in size of rDNA signals were observed between chromosomes of the same type within and between accessions; thus a type can refer to different chromosomes.

The size of the satellite in types I and VI may differ between accessions.

Non-distension of the secondary constriction and/or smaller size or loss of the satellite possibly produce type I¹ from type I. Alternatively, type I¹ may represent a different chromosome. Type I², probably a variant of type I or I¹, represents a chromosome variant observed so far only in the genome S_ar.

Arrows indicate possible variation in the appearance of a certain chromosome type that leads to its manifestation as another type.