产量潜力、株高和抽穗期是决定农作物产量的3类主要性状。我们从优良杂交水稻中分离出一个数量性状位点(QTL)Ghd7。Ghd7编码一个含CCT结构域蛋白,它对水稻的一系列性状包括单穗粒数、株高和抽穗期都产生重要影响。在长日照条件下,增强Ghd7的表达可延迟抽穗期、增加株高和穗大小。但另一方面,Ghd7功能减弱的自然变异可使水稻能在温和及较冷地区种植。上述结果表明,Ghd7在水稻产量和适应性方面具有至关重要的作用。 Yield potential, plant height and heading date are the three major traits that determine the crop yield. We isolated a quantitative trait locus (QTL) Ghd7 from good hybrid rice. Ghd7 encodes a CCT-containing domain protein that has a significant effect on a number of rice traits, including grain number per spike, plant height and heading date. Under long-day conditions, enhancing Ghd7 expression delayed the heading stage and increased plant height and ear size. On the other hand, however, the natural variation of Ghd7 function can make rice planted in temperate and colder regions. The above results show that Ghd7 plays a crucial role in rice yield and adaptability.