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The creation of heterotic hybrids by means of conjunction of necessary alleles as result of recombination — is one of the most promising ways of adaptive selection. The raising of frequency of recombination in tomato as self-pollinator, therefore, has large value. In the present article the authors study a model efficiency of intra- and interpopulation breeding in connection with degree of genetic variability in Licopersicon esculentum Mill. tomato lines for protected soil. The Start (24-Е × 12-В) and Nadezhda (24-Е × 21-17) indeterminant hybrids and their parents forms were used as initial mate-rial. The 24-E and 21-17 parental forms, obtained by 2-year inbreeding from the Vezha local variety and the Matra Holland variety, respectively, have high combination ability on main components of productivity. The 12-B form from collection of N.I. Vavilov All-Russian Scientific Research Institute of Plant Growing, St. Petersburg has complex resistance to cladosporium and TMV. The crossing during obtaining F

REALIZATION OF GENOTYPIC VARIABILITY IN TOMATO (Licopersicon esculentum Mill.) IN THE GREENHOUSE CONDITIONS DURING PERIODIC SELECTION