Fig. 3

Chromosomal distribution of CRF members in Os, Oi, Osn, and Or. A: Oryza sativa Japonica Group. B: Oryza sativa Indica Group. C: Oryza sativa (circum-Aus1 var. N22). D: Oryza rufipogon. The left scale represents chromosome lengths, with “Chr” indicating chromosomes. Genetic distances were set at 200 kb to calculate the gene density of each chromosome, represented by a gradient color from blue (low gene density) to red (high gene density). Blank regions indicate genetic regions lacking gene distribution information. Red lines indicate segmental duplication gene pairs.