Abstract:

Improvement of maize hybrids was one of the key factors for the continuous increasing of

corn production in China. Under the premise of durative decreasing of cultivated area, the

increasing of yield potential by breeding would be crucial for maize production. In this

paper, we summarized the contributions of variety improvement to the increasing of yield per

unit area in China, the characters of improvement of Chinese maize hybrids and future

requirement, as well as the enhancement and status quo of breeding germplasm and potential

development in China. Also, we discussed the high density and high nutrient-efficiency

breeding strategy in China, the method of germplasm enhancement, and establishment of high

efficiency germplasm evaluation & enhancement platform, which were exprected to provide some

basic information for maize breeding.

Key words: maize, variety improvement, germplasm

摘要：

品种改良是实现我国玉米总产量持续提高的关键要素之一。在耕地面积持续减少的前提下,通过品种改良 提高单产水平,对我国玉米生产至关重要。就品种改良对我国玉米单产水平增加的贡献,我国玉米品种改良 进程的特点和发展要求,以及我国玉米应用性基础种质的主要来源、现状和生产需求进行了分析和思考。 最后,对我国玉米品种改良中的耐密性育种与营养高效育种、继续种质扩充的主要方式、建立高效玉米种 质评价和扩充体系等问题进行了讨论,旨在为玉米遗传育种提供一些基础信息。

关键词: 玉米;品种改良;种质资源