REVEALING THE DONORS OF THE SYSTEMS OF ADAPTABILITY, ATTRACTION AND MICRODISTRIBUTION IN WINTER-WHEAT VARIETIES

A group of physiologists, geneticists and breeders investigated geneti c and physiological systems of adaptability, attraction and micro-dist ribution in winter wheat varieties in eight geographical points, the l evels of mineral feeding in every point being different (1992, 1993). This investigation is based on the new method of the genetic analysis of quantitative characters, Dragavtsev (1993). The following two-dimen sional systems of the character coordinates were examined: the 'mass o f the ear' (breeding character - BCh) and the 'mass of 'straw' (foil c haracter - FCh); the 'mass of grains in the ear' (BCh) and the 'mass o f chaff in the ear' (FCh). They were investigated on the main stem, on individual plants, on plants per square meter, which made it possible to characterize the varieties by frequency occurrence of strong posit ive drifts in every system and to specify the universal and regional d onors in the systems under consideration.