Abstract
The results of the study of architectonics and physical and mechanical properties of the stems of 19 selective forms of spring hexaploid triticale of different ecological and geographical origin are presented. The susceptibility of triticale plants to lodging was evaluated by a set of traits: weight of a 10-cm straw of the 2nd internode; stem resistance to breaking determined by the peak reading of an electronic dynamometer; stem tissue density of the 2nd internode. The studied samples differed significantly in these parameters and were characterized by different degrees of the resistance to lodging. Promising breeding specimens that can be used as sources of valuable traits have been identified based on the totality of the strength parameters. Application of the principal component method allowed to identify the trait "sum of lengths of the 2nd and 3rd internodes", which was determinant in providing lodging resistance in the studied samples. The use of cluster analysis made it possible to simultaneously take into account the entire set of studied characteristics of architectonics, physical and mechanical properties and productivity of plants, group samples into clusters and identify optimal groups for further use in practical breeding
Keywords
References
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