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以2个由亚热带群体和与之杂种优势关系最近的温带核心种质代表系杂交构建的半外来群体为试验材料,将其中的部分选系与测验种测交,通过杂种优势和配合力来分析改良效果,为这些半外来群体及其选系在高纬度地区的继续改良和利用提供依据。结果表明:半外来群体B73×Pob45与旅大红骨群和Lancaster群测验种有较大的杂种优势和特殊配合力,Mo17×Pob46主要与改良Reid群测验种有较大的杂种优势和特殊配合力,其中的部分选系有进一步改良和利用的价值。
Two semi-alien populations, which were crossed by subtropical populations and the temperate core germplasm with the closest hybrid heterosis, were used as experimental materials, some of which were selected and tested, and analyzed by heterosis and combining ability Improve the results for these semi-alien groups and their selection in the high latitudes continue to improve and provide the basis. The results showed that the semi-exotic population B73 × Pob45 had greater heterosis and special combining ability with the Ludahong group and Lancaster group. The main heterosis and special combining ability of Mo17 × Pob46 with the improved Reid group , Some of which have the value of further improvement and utilization.