10个玉米品种（系）的产量比较及主要农艺性状的关联度分析

为了解中国东南区普通玉米的主要农艺性状间的关系进而指导育种实践，通过灰色关联度分析的方法，研究了10个玉米杂交种的产量及主要农艺性状间的关系，结果表明：2011QS04、2011QS05与其他8个品系产量差异达显著水平，因此推荐进入生产试验，品系2011QS09和品系2011QS01比对照增产不显著，建议再试验一年，其他品系均比对照减产，建议停止试验；关联度分析表明11个主要农艺性状与产量的关联度依次为：百粒重>穗长>行粒数>叶片数>雄穗分枝数>穗柄长度>穗粗>秃顶>穗位高>行粒数>株高。结合各性状间的关联度分析结果可知，在育种实践中应在保持适当株高的前提下，选择百粒重大、穗长较长、行粒数多，全生育期叶片数较多的品种。

Yield Comparison of 10 Maize Lines (Variety) and Correlation Degree Analysis for the Main Agronomic Characters

Through the yields comparison and the correlation degree analysis for the main agronomic characters with yield in Southeast region, the results were: line 2011QS04 and line 2011QS05 could be production test, because they were significantly better than the other 8 lines, correlation degree analysis showed that the importance of the agronomic characters was: 100-seed weight > ear length > row grains > leaves > tassel branch > ear stalk length/ear position internode length > ear diameter > bald > ear position height > ear rows > plant height. So we should select the varieties (strains) of 100-seed weight bigger, ear length longer, more row grains and more leaves.