Fig. 2

Hierarchical cluster analysis of gene-expression pattern in leaves of five rice genotypes under two water-deficit treatments. The differentially expressed genes under water-deficit treatments with adjusted P < 0.05 and −1 ≤ log₂ratio ≤ +1 (fold change ≥ 2). K-means clustering was performed to identify 8 clusters (I to VIII), each containing various numbers of genes with a similar gene-expression profile under two WD treatments. The numbers are 10 = IR77298-14-1-2-B-10, 13 = IR77298-14-1-2-B-13, 11 = IR77298-5-6-B-11 and 18 = IR77298-5-6-B-18; respectively; 0.2 and 0.5 FTSW are severe and mild WD treatment, respectively. Gene identifiers corresponding to each transcript are from MSU version 6.1 of Rice Oligoarray from Rice Genome Annotation Project (RGAP) 6.1 (http://rice.plantbiology.msu.edu/). A fold change > 2.0 is shown in red (up-regulated), a fold change < −2.0 is shown in green (down-regulated), and no change is shown in black (FDR < 0.05)