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本文用“矮优二号”和“南优二号”及其相应的不育系、保持系、恢复系和对照品种“珍珠矮”、“IR_(661)”为材料,研究了它们在三种不同光周期条件下——自然日照、短日照(10小时光照)和长日照(不断光照)的生长和发育。结果表明:杂交水稻的生育期,主要由父本(恢复系)所决定。恢复系的其他一些性状如株高、叶面积等均较母本(不育系)的遗传传递力强。杂交水稻“矮优二号”和“南优二号”与父本“IR_(24)”和对照品种“珍珠矮”、“IR_(661)”比较,优势显著,且在三种不同光周期条件下,都显示出产量高的优势,表明杂交水稻适应性广。
In this study, “dwarf pear” and “IR_ (661)”, “Dwarf Yau” and “Nanyou No.2” and their corresponding sterile, maintainer, restorer and control varieties, Under different photoperiod conditions - growth and development of natural sunlight, short sunlight (10 hours light) and long sunlight (light). The results showed that the growth period of hybrid rice was mainly determined by the male parent (restorer line). Some other traits of restorer lines, such as plant height and leaf area, were stronger than the female parent (CMS). The hybrid rice “Dwarf two” and “Nanyou two” had significant advantages compared with the male parent “IR_ (24)” and the control variety “Pearl short” and "IR_ (661) Under the conditions, all showed the advantage of high yield, indicating that hybrid rice has wide adaptability.