Q enzyme activity in strong grains reached its peak on 10th DAA, while in weak grains reached the highest on 5th DAA. The expression time of Q enzyme activity in strong grains was later than that in weak grains.

• 强势粒Q酶活性花后10天达到峰值，弱势粒花后5天时酶活性最高，强势粒Q酶活性表达时间迟于弱势粒。