It was accordingly revealed that the heritability of early maturity suffered strong environmental impact and thus in environmentally different locations it was not reliable to use the position of the first fruiting shoot and the period from sowing to budding as the criteria of early maturity but feasible and practicable to use growth period and flowering time as the index of early maturity 由此说明：早熟性的遗传受环境影响较大，在生态条件差异较大的育种地点，以果枝始节和播种现蕾作为早熟性指标进行异地选择是不可靠的，而以生育期、开花期为早熟性选择指标是比较可行的。
