利用国内外10个优良玉米自交系与华玉11双亲Q736和Q1,分别组配成单交组合和三交组合,来评价这些自交系对华玉11产量和穗位高的改良潜力。结果表明,基于单交测试的鉴定方法难以充分发掘外来种质的利用价值；当外来种质与本地优良种质组配成半外来种质后,适应性显著增加,并通过进一步组配三交测试种能更充分地挖掘出育种潜力。经鉴定,自交系HZ127IM、PHVA9、LH38、郑58、M54、Recovered B73、M5972和PHG29对改良华玉11的产量及穗位高有利用价值,同时对拓宽西南山区种质基础也有一定帮助。

To evaluate the breeding potential of 10 inbred lines for improving the elite hybrid variety Huayu11, a set of single-cross hybrids and three-cross hybrids were developed using these 10 inbred lines with the parents of Huayu11. As a result, direct evaluation based on single-cross testing was not desirable for identifying breeding potential of these lines. By contrast, it is more superior to exploit the breeding potential of these lines that identified semi-exotic germplasm crossed with the parents of Huayu11. Meanwhile, we found those lines HZ127IM, PHVA9, LH38, Zheng58, M54, Recovered B73, M5972 and PHG29 could be used for improve the yield and ear height of Huayu11. These lines were also helpful to broaden the basic germplasm in the mountain regions in Southwest China.

国家重点研发计划项目(课题编号：2016YFD0101205)