水稻与小麦不同,穗子在灌浆开始后逐渐弯曲。而近年来通过籼粳稻亚种间杂交育成的、以株型好产量高著称的辽粳5号品种,在株型上的一个重要特点是穗子直到成熟仍然保持直立状态。关于辽粳5号品种的穗直立性问题,虽已引起了人们的关注,但由于过去直立穗型水稻品种很少,迄今尚未见到这方面的具体研究报道。本试验对穗的直立性进行了初步观察,并着重分析了穗直立性与其它性状的关系,以探讨直立穗型品种资源的利用价值。 Rice differs from wheat in that the ears are gradually bent after the beginning of filling. In recent years, indica / japonica subspecies hybrids have been developed in recent years, with good plant type and high yield known as Liaojing 5 varieties in the plant type is an important feature is until the ear maturity upright state. Although the ear uprightness of Liaojing 5 varieties has aroused people’s attention, there has been no specific research report in this area due to the few varieties of erect panicle type rice in the past. In this experiment, the erectness of ear was preliminarily observed, and the relationship between erectness and other traits was analyzed emphatically to explore the value of erect panicle variety.