The experiment was carried out with the objective of evaluating the effect of harvest delay on the differentiation of seed quality in soybean. Four different genotypes were utilized: LOX-Lin b (seeds without lipoxygenase and low linolenic acid content); LOX+Lin n (seeds with lipoxygenase and normal linolenic acid content); LOX-Lin n (seeds without lipoxygenase and normal linolenic acid content) and LOX+Lin b (seeds with lipoxygenase and low linolenic acid content). The seeds were harvested at the R8 stage, and at R8+15 days and R8+30 days. Seed physiological quality was evaluated by germination, accelerated aging, germination speed, electric conductivity and seedling emergence tests. It was concluded that: the delayed harvest from R8+15 days was efficient to differentiate genotypes for seed physiological quality. Genotypes without lipoxygenase showed higher seed physiological quality than genotypes with lipoxygenase.
Glycine max; lipoxygenase; linolenic acid; havest; vigour
