引种美国玉米杂交种的分析与思考

Analysis and Reflection on Hybrid Strains of Maize Introduced from America

2006～2007年引种美国芝加哥州、伊利诺伊州以及德尔兰种业公司玉米杂交种26个,田间观察与室内外考种结果表明,引种的美国芝加哥州和伊利诺伊州大部分玉米杂交种为中晚熟类型,德尔兰种业公司玉米为中早熟矮秆类型,特点是耐密植,雄花分枝少,母本子粒品质好,开花前茎秆柔性好,大部分为半上冲叶片,排列均衡稀疏,苞叶薄,层数少,果穗小到中等,轴细,子粒深。这些材料大部分不抗玉米矮花叶病和青枯病,苞叶短,有秃尖。该种质耐密、早熟、中低秆和高出籽率,对于培育适应我国种植的耐密、中秆、中穗及适合精量点播和机械收获的玉米新品种具有参考作用。

Twenty-six hybrid maize strains were introduced from states of Chicago,Illinois and Dorland seed company in America from 2006 to 2007.The results of field observation and indoor or outdoor examination showed the most hybrid strains from Chicago and Illinois were middle late maturing types and the strains from Dorland middle early maturing and low stem ones.They showed the same characters of close spacing,few-branched staminate flower,fine quality female parent grain,lithe stem before blooming stage,partly s...