Characterization of vegetative and grain filling periods of winter wheat by stepwise regression procedure, 2: Grain filling period
2011
Pržulj, N., Institute of Field and Vegetable Crops, Novi Sad (Serbia) | Momčilović, V., Institute of Field and Vegetable Crops, Novi Sad (Serbia)
In wheat, rate and duration of dry matter accumulation and remobilization depend on genotype and growing conditions. The objective of this study was to determine the most appropriate polynomial regression of stepwise regression procedure for describing grain filling period in three winter wheat cultivars. The stepwise regression procedure showed that grain filling is a complex biological process and that it is difficult to offer a simple and appropriate polynomial equation that fits the pattern of changes in dry matter accumulation during the grain filling period, i.e., from anthesis to maximum grain weight, in winter wheat. If grain filling is to be represented with a high power polynomial, quartic and quintic equations showed to be most appropriate. In spite of certain disadvantages, a cubic equation of stepwise regression could be used for describing the pattern of winter wheat grain filling.
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