Table 2.

Number of clustered groups of genes at different multiplicity levels in five angiosperm species

The statistics are based only on groups that contain genes from at least two different species, as constructed from syntenic alignments. The number of inferred ancestral loci is calculated by ∑¹⁰_m=1N_m, and the number of genes that maintain their ancestral positions is calculated by ∑¹⁰_m=1m ⋅ N_m, where m is the multiplicity level varying from 1 to 10 and N_m is the number of groups for each multiplicity level.

^aExpected multiplicities for Carica, Populus, and Vitis. The multiplicity for Arabidopsis is 12 (yet no gene groups retained all 12 copies), and equivocal for Oryza.