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Plant height is increased in Rht18 overgrowth mutants in tetraploid (A and B) and hexaploid (C and D) wheat. Plant height was measured at maturity and data presented as mean values ± se (n = 12 for each line). Different letters indicate significant differences in plant height of tetraploid (B) and hexaploid (D) wheats (ANOVA, P < 0.05).
