Figure 2

Aliquoting of grape genome into three subgenomes by the aliquote algorithm. Arcs making up the circumference of each circle represent grape chromosomes. Lines within circles represent paralogies established at the time of hexaploidization. Note that between circles defined by the algorithm, hypothesized to reflect the seven pre-hexaploid core eudicot chromosomes, there are virtually no paralogies, and within circles, no paralogies within subgenomes, and many paralogies between subgenomes. Note also that chromosomes 4, 7 and 14 appear in two circles each, reflecting chromosomal fusions in the grape lineage, while one circle is labeled by four chromosomes: 3, 4, 7, 18 because of the incorporation of fissioned parts of an ancient chromosome into chromosome 4 and 7.