分析京科968等系列玉米品种与易制种相关的农艺性状、典型制种高产田的产量及产量构成要素。结果表明,京科968等系列玉米品种具有良好的易制种特性,单位面积制种产量大幅高于先玉335,与郑单958相当或略高。按单位面积有效商品子粒数计,京科968玉米品种较郑单958和先玉335具有明显优势。先进的育种指导思想和技术路线是易制种京科968等系列玉米品种选育成功的关键,集成和优化制种关键技术措施是其实现高产高效制种和产业化推广应用的基础。

Characteristics related to ‘easy seed production’ of Jingke968 et al., and their yield and yield components in typical seed high-yield plots were analyzed. The result showed that Jingke968 et al possessed good traits for easy seed production, and their seed yield per unit area was as high as Zhengdan958 and higher than Xianyu 335. Compared to Zhengdan958 and Xianyu335 there were obvious advantages in the total effective commodity grain number per unit area for Jingke968. Advancing breeding guidelines and technical routes were the key to the success for Jingke968 et al in easy seed production, and integrated and optimized the key technical measures were the basis for high yield and high efficiency in seed production.

国家"863"项目"强优势玉米杂交种的创制与应用"(2011AA10A103)、粮食作物产业技术体系北京市创新团队专项经费资助项目(BITG7)、北京市农林科学院科技创新能力建设专项"玉米种质资源发掘、收集整理与创新"(KJCX20140107)