Abstract: Aiming at the problems of curved panicle type rice and erect panicle type rice, the breeding technical route of semi-curved japonica rice with heavy spikes and large grains was determined. With the technical route, we have bred the japonica rice variety Jinyuan 89 with fine quality, stress resistant and high yield, which possessed the advantages of erect panicle type and curved panicle type. This variety has the characteristics of strong root systems, high rate of light energy utilization, leaves erect, lodging resistance, large ear and grouting fast, solved the technical problems of rice quality, stress resistance and super high yield that difficult to take into account. The yield of the general production field is about 800 kg/667 m2, the yield of the demonstration field is about 930 kg/667 m2, and the yield of the heavier-saline field is 700~760 kg/667 m2. The semi- curved heavy panicle and large grain japonica rice has the characteristics of strong heredity and fast stability of breeding, which innovated japonica rice breeding technology system and linked germplasm resources with excellent traits, and achieved a new breakthrough in breeding ideal plant type of japonica rice.

Key words: ideal plant type, semi-curved heavy panicle and large grain japonica rice, high quality, stress resistance, high yield

摘要： 1 天津市优质农产品开发示范中心/天津市原种场，天津 301505；2 天津市农业发展服务中心种植业技术推广服务部，天津 300061；3 中国农业科学院作物科学研究所，北京100081

关键词: 理想株型, 半弯曲重穗大粒型, 优质, 抗逆, 超高产