玉米不同品种的产量和植株性状的比较

对北方地区引进的40个普通玉米品种的产量和产量性状进行了相关及回归分析，以评价不同产量水平的品种在产量构成因素上的差异．结果表明：供试玉米品种之间的产量有极显著的差异．玉米品种单株产量与每穗粒数和千粒重的回归关系显著，与每穗粒数的相关显著性最高，穗长与单株产量的相关系数也达显著水平．高产玉米品种的每穗粒数和千粒重均较高，生育期稍长，植株繁茂性较好，抗旱性较强．

Comparative Research about the Yield and Plant Characters of Maize Varieties with Different Yield Potential

By correlation and regression analysis,this paper analyzed yield and its components of 40 kinds of maize varieties,which were introduced from the North of Chinat,o evaluate the differences on yield components of maize varieties with different yield potential.As a result,there were significant differences among the yields of the maize varieties tested in this experiment.The regression relationship was significant between the maize yield per plant and seed number per ear and thousand seed weight.The correlation coefficient between yield and seed number per ear was quite significant,and also the ear length also correlated significantly with the yield per ear of maize.Comparing with low-yield varieties,the seed per ear and thousand seed weight of the high-yield varieties was higher,their growth period was longer,and their plant was more luxuriant and more tolerant to drought.