Distribution of Three Multigene Families That Encode NBS-LRR, Cytochrome P450, and LRR Kinase Proteins in the Arabidopsis Col-0 Genome Relative to Segmental Duplications

Gene Family Class NBS-LRR Cytochrome P450 LRR Kinase No. of pairs of segmental duplications 81 81 81 No. of pairs with gene(s) in either or both segments 34 47 52 No. of pairs with gene(s) in only one segment 25 19 24 No. of pairs with gene(s) in both segments 9 28 28 No. of pairs with simple duplication of a genea 4 15 21 Total genes in family 149 245 206 No. (%) of genes residing in segmental duplications 124 (83%) 199 (81%) 163 (79%) No. (%) of genes in simple segmental duplicationsa 14 (9%) 81 (33%) 66 (32%)

^a Each pair of genes had to have at least 40% identity, and their element on the diagonal plot is located along the duplication diagonal (see supplemental data online).