Fig. 2

Patterns of the diurnal gene expression. Quantitative gene expression data from plants grown in short days (0–9 h light period) in а climatic chamber. Gray shadowing indicates the dark period (9–24 h). The graphs compare the expression between the photoperiod sensitive parental line PSL2 (red) and the photoperiod insensitive NILs (“Ppd-m” (green), “Ppd-w” (purple)) and parent Sonora (blue). Values are expressed as the relative levels normalized against 18S ribosomal RNA. Error bars indicate the SE of the means. Asterisks indicate significant (P < 0.05) differences in a one-way ANOVA with a post hoc Tukey test comparing the photoperiod insensitive NILs (“Ppd-m”, “Ppd-w”) and the parent Sonora with the photoperiod sensitive parental line PSL2 in each time point