THE ROLE OF PREDICTIVE POSSIBILITIES OF HOMOLOGOUS SERIES LAW IN HEREDITARY CHANGEABILITY WHEN SEARCHING BOTH ADAPTIVELY SIGNIFICANT AND VALUABLE IN AGRICULTURE GENE-DONORS
The principle value of homologous series law in hereditary changeability, formulated by N.I. Vavilov, is its prognostic essence, allowing to search for, purposefully, gene-donors, both adaptively signifi cant and valuable characteristics. Not only has the validity of this very law been justifi ed by now, but also its new predictive possibilities have been discovered. It includes non-randomness of mutational changeability spectrum in closely related species, block (cluster) structure in many multi-gene genera, non-randomness of transition of potential genotypic changeability to available for selection interrelations in genetic systems functioning of both ontogenetic and phylogenetic adaptation, formation of coadapted genes blocks and their evolutional “memory” as peculiarities of both abiotic and biotic medium in the process of plants’ evolution.