Genomic distribution of the OsGELP genes in rice chromosomes. The OsGELP genes are numbered 1–114. The white rectangles on the chromosomes (vertical bars) indicate the positions of the centromeres. Chromosome numbers are indicated at the top of each bar, and the number in parentheses corresponds to the number of the OsGELP genes present on that chromosome. The OsGELP genes present on duplicated chromosomal segments are connected by coloured lines (one colour per chromosome). The tandemly duplicated genes present in the same colour box. The roman numerals and vertical black solid lines show the number and specify groups of the closely linked genes identified as clusters. The blue and red triangles indicate the upward and downward directions of transcription, respectively.