HERITABILITY OF COMMON WHEAT RESISTANCE TO THE FUSARIUM AVENACEUM (FR.) SACC. FUNGUS IN THE F1 GENERATION
Nicolae CRISTEA Institutul de Genetică, Fiziologie și Protecție a Plantelor, USM
Abstract
The fungus Fusarium avenaceum (Fr.) Sacc. – one of the causative agents of root rot and spike fusarium, is
very widespread in the grass cereal crops, including common wheat, throughout the world, including in the Re- public of Moldova. Incorporating genetic resistance into crop plants is considered the most effective and sustai- nable method of the disease control. For the strategies to improve disease resistance, knowledge of the genetic basis of the reaction to the causative agents is necessary. Article presents the data regarding: i) influence of the F. avenaceum culture filtrate (CF) on the growth organs of the parental forms and F1 descendants of wheat, ii) the degree of dominance of the seedling vigor index in the control variant and with CF, iii) the influence of the parental factor on the manifestation of the vigor index, iv) the classification (dendrograms, k-means, multidi- mensional scanning) of the forms tested under the influence of the pathogen, v) the identification of genotypes that can be used as sources of resistance.
Keywords: common wheat, Fusarium avenaceum, resistance, degree of dominance, effect of reciprocity.
