温光敏两系杂交小麦灌浆特性研究

Studies on the Traits of Grain Filling in Hybrid Wheat with Temperature-Sensitive Two-Line

对温光敏两系杂交小麦籽粒灌浆干物质积累模型及灌浆特性与粒重的相关性进行了分析,结果表明:温光敏两系杂交小麦籽粒干重变化呈"S"曲线,整个灌浆过程中,杂交小麦的干物质增幅都比常规小麦高,且达到快速增长的时间要早。杂交小麦的灌浆速率和籽粒水分含量均呈正态曲线,其灌浆速率比同期常规小麦高。最大灌浆速率Rmax,快增期(R2)和缓增期速率(R3),渐增期持续天数(T1)是影响粒重的重要参数。因此提高渐增期和快增期速率对提高小麦粒重尤为重要。

The characteristics of temperature -sensitive two- line hybrid wheat were studied on grainfilling model of dry matter accumulation and grain filling characteristics and weight of the correlation analysis. The results showed that temperature -sensitive two-line hybrid wheat grain dry weight changes were ＂S＂ curve, the entire filling process, the hybrid of wheat dry matter growth was higher than the conventional wheat, and achieve rapid growth in the early time. Hybrid wheat rain - filling rate and grain moisture content showed a normal curve, the filling rate of wheat was higher than the same period in conventional. The biggest grain--filling rate（Rmax） ,R2,R3 , and increasing the number of days duration are important parameters affect the grain weight. Therefore improve faster rate of R1, R2 to improving wheat grain weight is particularly important