杂交水稻新组合K优40的选育及栽培技术

[目的]推广杂交水稻新组合K优40。[方法]对K优40的选育过程、产量表现、特征特性及栽培技术要点进行阐述。[结果]K优40是不育系K17A和恢复系R40配组育成的三系中籼杂交稻新组合。该组合具有株型适宜、分蘖力强、耐肥抗倒、长势旺盛、抽穗整齐、熟相好等特性,已于2000年通过四川省农作物品种审定委员会审定,2007年通过重庆市农作物品种审定委员会认定。[结论]该组合适宜重庆市和四川省海拔800 m以下稻瘟病非常发区作中稻种植。

Breeding and Cultivation Techniques of New Hybrid Rice Combination K You 40

[Objective] The study aimed to popularize the new variety of Three-line hybrid rice K You 40.[Method]The breeding process,yield performance,characteristics and key points in cultivation techniques of K You 40 were described.[Result]K You 40 was a new combination of three-line hybrid rice combined with K17A as sterile line and R40 as restorer line.The combination had such characters as perfect plant type,strong tillering potential,tolerance to higher fertility and resistance to lodging,vigorous growth,heading uniformity and good maturity,and had been approved officially by Sichuan Crop Variety Authorization Committee in 2000 and determined by Chongqing Crop Variety Authorization Committee in 2005.[Conclusion] This combination was suitable to be planted as mid-season rice in the regions with altitude lower than 800 m and seldom suffering from rice blast in Chongqing city and Sichuan province.