Abstract: The yield potential of hybrid rice has stagnated. A feasible approach to enhance the yield level of hybrid rice is to broaden the genetic diversity between the parents for the further improvement of heterosis level. It may be expected that the yield potential can be greatly improved through developing“super high yielding population ideotype”,pyramiding heterosis QTLs existing in different rice groups or ecotypes by molecular marker assisted reciprocal recurrent selection and exploring and utilizing distant heterosis QTLs existing in wild rice species by molecular marker analysis.

Key words: hybrid rice, breeding, germplasm resources, molecular marker technology, recurrent selection, heterosis

摘要： 杂交水稻的单产处于徘徊状态。提高单产的可靠途径在于扩大双亲的遗传差异, 进一步提高杂种优势水平。培育“杂交水稻超高产群体理想型”, 应用分子标记辅助相互轮回选择法累加不同组群的优势基因和应用分子标记技术挖掘与利用野生稻中的远缘优势基因, 有可能大幅度地提高杂交水稻的单产潜力。

关键词: 杂交水稻, 育种, 种质资源, 分子标记技术, 轮回选择, 杂种优势