Fig. 5

Expression profiles of two types GhCKI genes under different diurnal conditions. a and b Expression profiles of the type I and type II CKI genes in G. hirsutum under different diurnal conditions, respectively. Diurnal changes in transcript levels of 36 G. hirsutum CKI genes under short-day (SD) and long-day (LD) conditions. SD, short day (8 h light); LD, long day (16 h light); Black boxes denote dark, while the solid red boxes show light. Values are means ± standard deviations. Asterisks indicate statistically significant differences (*P < 0.05, **P < 0.01) by Student’s t-test. The GhUB7 (Gh_A11G096) was used as the reference gene to normalize the total amount of cDNA in each reaction