INFLUENCE OF THE DRECHSLERA BISEPTATA (SACC. & ROUM.) FUNGUS ON THE TRANSGRESSIVE VARIABILITY IN COMMON WHEAT
Galina LUPAȘCU, Nicolae CRISTEA, Elena SAȘCO, Nadejda MIHNEA, Institutul de Genetică, Fiziologie și Protecție a Plantelor, Universitatea de Stat din Moldova
Аннотация
Drechslera biseptata fungus influences the organs of growth and development (germination, embryonic radicle,
stem) of common winter wheat, mostly by inhibiting them, which is reflected on the seedling vigor index. The action
of the pathogen and the orientation of the cross to the formation of F1 hybrids is reflected on the phenotypic structure
and the rate of positive transgressions in the segregating F2 populations in terms of growth organs. The obtained data
signify the important role of the positive complementary actions of genes in the formation of the character of resistance of common wheat to the pathogen. Wheat combinations were identified with a high degree and frequency of
positive transgressions for the most sensitive organ to the action of the pathogen – the embryonic radicle.
Keywords: common wheat, Drechslera biseptata, growth organ, variability, transgressions.
