Simulation research on dynamic development of leaf length and leaf width of maize inbred lines resistant to southern corn rust based on effective accumulated temperature
[Objective]To explore the dynamic development model and characteristic parameters of leaf length and leaf width of maize inbred line resistant to southern corn rust based on effective accumulated temperature,and to quantitatively describe the dynamic development process of leaf length and leaf width by using the effective accumulated temperature as the step unit.[Methods]By using maize inbred lines H0836 and H0841 resistant to southern corn rust as experimental materials,field experiments were conducted of spring sowing and summer sowing in 2023.A Logistic model for the dynamic development of maize inbred line leaf length and leaf width was constructed based on effective accumulated temperature,and the model was tested by field measured values.[Results]The dynamic development of leaf length and leaf width of maize inbred lines planted of spring sowing and summer sowing showed a one-way increasing S-shaped trend with the effective accumulated temperature.The Logistic model of maize inbred line leaf length and leaf width based on effective accumulated temperature had the good practical biological significance,with determination coefficients R2 of 0.973 7-0.993 3 and 0.975 5-0.996 8,respectively,and the standardized root mean square errors nRMSE were 3.49%-9.31%and 2.10%-7.58%,respectively,all less than 10%.The measured values were evenly distributed on both sides of the simulated curve,and were very close to the simulated curve,reaching an excellent predictive level.The effective accumulated temperature required for the rapid increase period of leaf length and leaf width in spring sowing maize and summer sowing maize inbred lines were 218.16-302.15℃·d and 150.95-237.07℃·d,respectively.The accumulated temperature required to reach the maximum growth rate were 492.52-533.44℃·d and 464.51-549.57℃·d,respectively.The average growth rate in rapid increase period were 0.051 5-0.078 9 cm/(℃·d)and 0.004 6-0.006 6 cm/(℃·d),respectively.[Conclusion]The Logistic model has good prediction and interpretation for the dynamic development of maize inbred line leaf length and leaf width based on effective accumulated temperature,and has great utilization value.
Maize inbred line resistant to southern corn rustLeaf lengthLeaf widthEffective accumulated temperatureLogistic model
万方数据
维普
