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进行籼粳亚种间杂交,促进亚种间遗传基因交流,是水稻超高产育种的主要方法之一。在配制强优势的籼粳交组合上,也前景诱人。然而,亚种间杂交一代结实率极低。为解决这一问题,人们除采用连续回交或复交的手段外,还致力于寻找一种对籼、粳稻杂交均可育的广亲和种质资源。日本学者池桥宏、荒木均等从1979年便致力于这方面的工作,筛选出Ketan Nangka、Cpslo 17等广亲和性品种,并指出这种广亲和性是由广亲和基因S_5~n控制的。随后,我国亦筛选出SMR、02428等一批广亲和材料,它们与籼粳杂交F_1结实正常或接近正常,同时,表现出强大的杂种优势。目前,水稻育种家和品种资源工作者都十分重视对广亲和性种质资源的筛选工作,但多采用人工去雄杂交方法,工作
It is one of the main methods for super-high-yielding rice breeding to carry out indica-japonica crossbreeds and promote the exchange of genes among subspecies. In the preparation of strong combination of indica and japonica cross, but also attractive prospects. However, subspecific hybrids have very low seed set rates. In order to solve this problem, people have not only adopted the method of continuous backcrossing or compounding, but also have been devoting themselves to searching for a wide-compatible germplasm resource that is fertile to both indica and japonica hybrids. Japanese scholars Chihiro Hashimoto and Hiroki Araki have devoted themselves to this work since 1979 and screened broad compatibility varieties such as Ketan Nangka and Cpslo 17 and pointed out that this wide compatibility is derived from the broad compatibility gene S_5 ~ n controlling. Subsequently, our country also screened a number of SMR, 02428 and a number of wide affinity materials, they and indica japonica hybrid F_1 normal or near normal, at the same time, showed a strong heterosis. At present, rice breeders and variety resource workers attach great importance to the selection of broad compatibility germplasm resources, but they often adopt the method of artificial mating to eliminate malevolence and work