不同小麦品种籽粒灌浆特性分析

Analysis on Grain Filling Characteristics of Different Wheat Varieties

为了给小麦高产栽培及新品种选育提供依据,对9个小麦品种的籽粒灌浆过程进行了研究。结果表明,小麦籽粒干重呈"S"型曲线增长,籽粒灌浆期可分为渐增期、快增期、缓增期三个阶段。相关分析表明,粒重主要是由快增期持续时间和灌浆速度决定的,与整个灌浆持续期关系不明显。在小麦灌浆快增期,灌浆速度越快,持续时间越长,干物质积累越多,粒重就越高。不同品种间籽粒灌浆特性存在一定的差异;综合分析表明,襄麦29和百农矮抗58-1籽粒灌浆速度较快,粒重较高。

In order to achieve high yield and offer evidence for selecting new varieties, the grain-filling processes of ten different wheat varieties were studied. The results showed that grain dry-weights showed ＂S＂ curve at grain-filling period. Wheat grain filling stage can be divided into gradual increase stage, the rapid increase stage, and increasing period. Correlation analysis showed grain-weight were decided by rapid increase stage and grain filling rate and was not obvious with the entire grain-filling period. In rapid increase stage, faster grain-filling rate, longer duration, more dry-matter accumulation quantity and higher grain weight. The differences of Grain Filling Characteristics between varieties were obvious; Comprehensive analysis showed that the grain-filling rate of Xiangmai 29 and BN AK58-1 were faster, the grainweight were higher.