Six traits were measured to analyze the gibberellic acid sensitivity of wheat genotypes in two environments: greenhouse and laboratory. Plant height first and second leaf height insertion, first and second leaf length and difference between second and first leaf height insertion. These traits were evaluated at 20 and 28 days after germination in genotypes treated with 0 and 100 PPM of gibberellic acid. Differences between treatments with and without gibberellic acid indicated no genotype x environment interaction. High correlation was observed between second leaf height insertion and difference between second and first leaf height insertion at the greenhouse, and between plant height and second leaf length in the laboratory. These results indicate the possible use of the traits. Larger values were observed in greenhouse for almost all traits. However plant height demonstrated a better genotype differentiation in both environments.
Triticum aestivum; plant height; selection
