From the significance of the good germplasms for rice breeding, the applied study about the wide cross and polyploidization of cultivar and wild rice in rice breeding was summarized in this paper.

• 摘要从野生稻遗传资源在育种中的作用出发，概述了栽培稻与野生稻远缘杂交和多倍体化在水稻育种中的应用。