当前,杂交水稻的研究与推广工作,存在着两个重要问题:一是优势与熟期的矛盾,二是优势与抗病性的矛盾。后者指的是现有推广的强优组合,对水稻的二个重要病害——稻瘟病、白叶枯病的抗性较差,或者只能在一定程度上抗一种病害。这二个问题都影响杂交水稻的推广。为了解决上述问题, At present, there are two important issues in the research and popularization of hybrid rice. One is the contradiction between advantages and maturity, the other is the contradiction between superiority and disease resistance. The latter refers to the strong combination of the existing promotion, the resistance to two important diseases of rice - rice blast, bacterial blight is poor, or only to some extent, against a disease. Both of these problems affect the promotion of hybrid rice. In order to solve the above problem,