Genetika 2011 Volume 43, Issue 2, Pages: 349-359
https://doi.org/10.2298/GENSR1102349P
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Characterization of vegetative and grain filling periods of winter wheat by stepwise regression procedure: I. Vegetative period
Pržulj Novo (Institute of Field and Vegetable Crops, Novi Sad)
Momčilović Vojislava (Institute of Field and Vegetable Crops, Novi Sad)
Modeling plant growth by mathematical functions is important for
understanding plant development and growth. Most of the models of dry matter
accumulation in small cereals simulated the period of grain filling while
small attention has been devoted to mathematical simulation of vegetative
period till anthesis. The aim of this research was to determine the most
appropriate polynomial non-linear regression for dry matter accumulation till
anthesis in winter wheat. Pobeda, a medium early variety, was used as model
genotype for this research. A 5-year field data were analyzed by the forward
procedure of stepwise regression. Although the procedure requires the maximum
power of the polynomial regression to be used, we suggest using a lower power
since it is easier for understanding and explanation and it is taking into
account literature sources and biological laws. It can be accepted that
quadratic regression model appropriately fits the process of dry matter
accumulation till anthesis in winter wheat.
Keywords: dry matter accumulation, model, stepwise regression, vegetative period