Fig. 3

Circos diagram showing the frequency of IBD tracts on the 17 pear chromosomes in 500-kb windows. The rings in the diagram, from outer to inner, represent the chromosomes, and these include the following: (I) chromosomes and (II–VII red) chromosomal distribution of IBD tracts in comparison with the different populations; IBD-ERs in European and Asian pears are highlighted in red and blue, respectively. (II) Cultivated European-wild European; red bars indicate IBD-enriched regions (IBD-ERs, the number of IBD tracts in the top 5% of regions). (III) Cultivated Asian-wild Asian; blue bars indicate IBD-enriched regions (IBD-ERs, the number of IBD tracts in the top 5% of regions). (IV) Wild Asian-wild European. (V) Cultivated Asian-wild European. (VI) Cultivated European-wild Asian. (VII) Cultivated Asian-wild European. (VIII–XI blue) Chromosomal distribution of IBD tracts within the four pear populations: (VIII) cultivated European-cultivated European, (IX) cultivated Asian-cultivated Asian, (X) wild Asian-wild Asian, and (XI) wild European-wild European pears