【摘要】 为筛选适应黄淮海地区光照不足环境的耐阴性玉米品种，进而提高该地区玉米产量，本研究选取黄淮海地区推广面积较大的12个玉米品种作为试验材料。对这些材料在抽雄期开始进行为期6 d的遮光处理，并测定花丝数目、干物质积累量和产量等指标。研究结果显示，遮光处理显著降低了玉米的花丝数目、花丝长度、干物质积累量及产量，且不同品种的降幅存在差异。其中，产量平均下降91.64%，减少11.79 t/hm~2。进一步分析发现，穗粗、穗长、穗粒数、千粒重、花丝数目和花丝长度均与产量呈显著正相关，因此这些指标可作为筛选耐阴性玉米品种的有效依据。基于综合耐阴性状评价并通过聚类分析，最终筛选出‘京科968’、‘登海605’和‘浚单20’为耐阴品种。更多还原

【Abstract】 To select shade-tolerant maize cultivars adapted to low-light conditions in the Huang-Huai-Hai region and thereby improve maize yield in this area, twelve widely cultivated maize cultivars in the region were selected as experimental materials. These cultivars were subjected to a 6-day shading treatment starting at the tasseling stage, and indicators, including silk number, dry matter accumulation, and yield, were measured. The results showed that shading significantly reduced the silk number, silk length, dry matter accumulation, and yield, with the extent of reduction varying among different cultivars. On average, yield decreased by 91.64%,corresponding to a reduction of 11.79 t/hm~2. Further analysis revealed that ear diameter, ear length, number of kernels per ear, 1000-kernel weight, silk number, and silk length were all significantly positively correlated with yield, indicating that these indicators could serve as effective criteria for evaluating shade tolerance in maize. Based on a comprehensive evaluation of shade tolerance traits and cluster analysis,‘Jingke 968’,‘Denghai 605’, and ‘Xundan 20’ were ultimately identified as shade-tolerant cultivars.更多还原