Abstract
Morphophysiological and physicochemical parameters of sets of winter wheat genotypes were measured. High correlations were found between survival percentage of the winter wheat check variety under freezing and electroconductivity tests, stem electrical resistance after electric shock, and intensity of delayed leaf fluorescence at low temperatures. These correlations decreased when the number of varieties was increased to 35-100. Complex attribute of frost resistance was divided into large components using factor analysis. Biological interpretation was achieved for the first six components. Quantitative values for each component of frost resistance in the various genotypes were determined. The determination coefficient of multiple regression equations, where function was a level of frost resistance and arguments were the component's value for each genotype, varied from 0.80-0.94 over 10 years. It was proposed that the received equations might serve as a model for frost resistance and indicate which component of frost resistance determines the survival of plants in particular ecological conditions. The component structure concept of frost resistance is suggested and possible applications of this concept are discussed.
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Fedoulov, Y. System analysis of frost resistance in winter wheat and its use in breeding. Euphytica 100, 101–108 (1998). https://doi.org/10.1023/A:1018360007461
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DOI: https://doi.org/10.1023/A:1018360007461