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以两个玉米品种为材料,设置肥密顺、逆境对比试验,应用量纲分析原理筛选反映玉米穗与粒生长特征的变量及其数量关系式,探索量纲分析在玉米花后果穗和穗粒生长特征研究中的应用价值。重量、密度、容(体)积和相对生长率均是果穗和穗粒的重要生长特征。授粉后,果穗密度最小值、最大值分别为0.072和0.56 g/cm3,穗粒密度为0.061和0.63 g/cm3,它们的时间动态均符合y=a+b×cos(ct+d)。果穗密度、穗粒密度、果穗重量相对生长率、穗粒重量相对生长率、果穗体积相对生长率和穗粒容积相对生长率都具有逆境的稳定性,授粉至成熟的均值分别为0.273 g/cm3、0.285 g/cm3、0.10、0.11、0.076和0.076。果穗体积相对生长率和穗粒容积相对生长率具有基因型的稳定性。同一器官的重量相对生长率和容(体)积相对生长率之间关系符合y=ax/(b+x)。量纲分析有助于解析玉米花后果穗和穗粒生长。
Two maize varieties were used as materials to set up the test of compaction and adulteration of fat and adversity. The principle of dimension analysis was used to select the relationship between the variables and their quantitative characters that reflect the characteristics of ear and grain growth. The relationship between the number of ear and ear of popcorn Applied value in the study of growth characteristics. Weight, density, volume (volume) and relative growth rate are important growth characteristics of ear and ear grain. After pollination, the minimum and maximum values of spike density were 0.072 and 0.56 g / cm3 respectively, and the spikelet densities were 0.061 and 0.63 g / cm3, respectively. Their temporal dynamics were in accordance with y = a + b × cos (ct + d). Ear density, ear grain density, relative weight growth rate of ear weight, relative weight growth rate of ear weight, relative growth rate of ear volume and relative growth rate of ear volume both had the stability of adversity. The average values of pollination to maturity were 0.273 g / cm3 , 0.285 g / cm3, 0.10, 0.11, 0.076 and 0.076. The relative growth rate of ear volume and the relative growth rate of ear volume were genotypeically stable. The relationship between weight relative growth rate and relative volume growth rate of the same organ is in accordance with y = ax / (b + x). Dimension analysis helps to analyze the consequences of popcorn and spike grain growth.