【摘要】 1.粳恢 C57具有较高配合力,杂种一代具有较强优势,花粉量大,有利于提高异交结实率,是当前较好的广谱恢复系。2.籼粳杂交复交与配子利用的“架桥”制恢方法,在杂种一代提供利用部分籼核的机率,丰富了遗传基础,为间接利用籼粳杂种优势及其优良性状开辟了途径。3.粳恢 C57对杂种一代的株型、叶型、高产的“库”和“源”以及适应性等方面具有良好的改进和增强作用。更多还原

【Abstract】 The hybrid Indica rice breeding in China has scored great achieve-ments,but the hybrid Japonica rice breeding developed slowly,due to laekof resources of the restorer.Since 1971,we started the hybrid Japonicarice breeding work.The results are briefly stated as follows:1.The Japonica type restorer C57,which possesses high combiningability and vigorous heterosis,is one of the wide-spectrumed restorersat present.2.(?).reeding restorer by means of triple crossing between Japonica andIndica is a good method which provides us with more probability of uti-lizing Indica nucleus so as to enrich its genetic potentiality.Using the“bridge method”could pave the way for utilizing heterosis between In-dica and Japonica and its excellent characters.3.The restorer C57 could improve plant type,leaf type,and couldincrease the“source”and“sink”of high yield for hybrid rice.更多还原