extremely significantp < 0.01
Germination Test and Seedling Growth Test According to a comparative analysis of the physiological indices of ten seeds from the 24 maize hybrid seed lots of eight cultivars, the indices of three seed lots of the same cultivar all exhibited the same trend in change: 2023 seed lot > 2022 seed lot > 2021 seed lot; the differences in the vigour indices (such as the GI and VI) among the three seed lots of the same cultivar were significant ( p < 0.05) or extremely significant ( p < 0.01).