Fig. 4.

ELF3-Col is haploinsufficient in a hybrid Col × Ws genetic background. Hypocotyl length under SD was measured in seedlings from parental and F₁ lines. elf3-ws is the elf3-4 loss-of-function mutant in the Ws background; elf3-col is the elf3-200 loss-of-function mutant in the Col background. Reciprocal crosses for each F₁ showed similar results. n = 15–20 for each genotype, except for F₁Ws x elf3-ws (n = 5). Error bars are SEM. Genotypes labeled with different letters differed significantly by Tukey-HSD test with α = 0.05.