禾谷类作物小穗发育存在时空顺序，因而不同部位籽粒的结实特性和籽粒性状存在差异。

Wheat seeds are developed in a spatial-temporal order resulting in different grain weights and protein contents in different positions of spike.

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禾谷类作物小穗发育存在时空顺序，因而不同部位籽粒的结实特性和籽粒性状存在差异。

Wheat seeds are developed in a spatial-temporal order resulting in different grain weights and protein contents in different positions of spike.

youdao