种植密度对玉米骨干自交系与衍生系产量及生理特性的影响

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本论文旨在研究种植密度对玉米骨干自交系与衍生系产量及相关生理特性的影响,以期为高产玉米栽培和育种提供科学依据。试验材料为黄早四与衍生系昌7-2,掖478与衍生系郑58,以及黄早四与掖478的杂交种黄掖,昌7-2与郑58杂交种郑单958。试验设3个种植密度,分别为3000株/亩,5000株/亩,7000株/亩。试验主要研究结果如下:1.种植密度对自交系与衍生系的产量和产量构成的影响在不同的种植密度下,衍生系昌7-2,郑58的产量均显著高于其骨干系黄早四,掖478,其中昌7-2穗行数比骨
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