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根据 2年的华北夏玉米区域试验材料 ,应用回归系数和性状相关的方法 ,研究了玉米杂交种 7个农艺性状对其籽粒产量稳定性的影响。结果表明 ,大部分农艺性状与杂交种稳产性呈负相关 ,以穗行数和千粒重的影响最大 ,穗位高、穗长、株高和穗粒数的影响较小。在育种实践中 ,可加强对稳产性影响小而对籽粒产量影响大的性状进行选择 ,适当降低穗位高 ,增加穗粒数 ,有利于提高玉米杂交种产量的稳定性。
Based on the two-year field trials of summer maize in North China, the effects of seven agronomic traits on grain yield were studied using regression coefficients and traits. The results showed that most of the agronomic traits were negatively correlated with the stability of the hybrids. The effects of spike row number and 1000-grain weight were the most significant, and the effects of high ear height, spike length, plant height and grain number per spike were small. In the practice of breeding, the selection of traits that have little effect on the stability of grain yield and have a great effect on the grain yield can be strengthened, and the ear height and spike grain number can be properly reduced, which is in favor of improving the yield stability of the corn hybrid.