Fig. 1.

Overview of chromosomal introgressions in the WHEALBI collection. a Boxplot showing the percentage of each chromosome that is part of an introgression in hexaploid genotypes of the WHEALBI collection. Each dot corresponds to one wheat accession. Colour indicates the group. Chromosome 4A was split into three parts, according to the subgenome ancestry of the different segments of chromosome 4A (Dvorak et al. 2018). Boxes indicate the inter-quartile range (IQR) with the central line indicating the median and the whiskers indicating the minimum and maximum values without outliers extending beyond—1.5*IQR and maximum + 1.5*IQR. b Introgression frequencies along wheat chromosomes in 500 kb bins. For each chromosome, the barchart on top shows the percentage of accessions having an introgression in each bin. The heatmap at the bottom shows the coverage of the accession with the lowest coverage for each respective bin. For example, in the case of Chr. 1B, there is one accession in which the entire chromosome is replaced by Chr. 1R from rye. The top track, however, shows that introgressed 1R segments are generally rare in the wheat accessions tested