随着颖花分化数的增加，颖花退化数有显著的增加。
With the increment of differentiated spikelets, the retrograded spikelets increased significantly.
结果表明，维管束数目与一、二次枝梗数及颖花数有密切关系。
The results showed that: the number of primary branches, secondary branches, and spikelets were closely associated with the number of vascular bundle.
叶面积下降速率与颖花的充实粒率及籽粒充实度呈负相关关系。
The rate of green leaf area decrease was negatively related to increase the well grain-filling grain percentage (PGP) and grain filling degree (GF).
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