Figure 1
The genetic relationship between Brassica species of the "Triangle of U" [1]. Diploid species are indicated by red font, allotetraploid (amphidiploid) species by blue. The background shading for species text boxes is for ease of identification and is also adopted within the Brassica gene registry [5] and Brassica reference chromosome assignment site [3]. Cytodemes are indicated below the species names, with the number of chromosomes in the haploid genomes indicated in parenthesis.