从日本超高产品种(系)的选育看粳稻高产的方向

Judging the Way forward of Breeding Japonica Rice for High Yield from the Advance of Breeding Super-high Yield Varieties in Japan

分析日本最近育成的水稻超高产品种(系)的特点及选育过程的结果表明,要进一步提高北方粳稻单产、高产育种与高产栽培同样重要,增加穗粒数和千粒重是主要途径,提高生物产量是突破口,籼粳稻杂交是主要育种方式,同时还应注重大粒和地理远缘遗传资源的利用。

The properties and breeding process of the rice varieties with super-high yield,which were bred recently in Japan,were analysed.The results showed that both breeding and cultivation were of equal importance in increasing yield further in the North Japonica Rice Region.Increase in grain numbers per panicle and the weight of grain will be the main way.It suggests that the biomass must be brought throngh.Therefore,indica-japonica hybridization will be consid-ered as one of the main methods in breeding rice for high yield.In addition,big grain and the use of distant genetic resouces in geog-raphy have to be considered simultaneously.