Abstract
A study was conducted into the course of meiosis in F1 interspecific hybrids of Lycopersicum esculentum Mill (mutant line Mo 638) × Lycopersicum chinense Dul. and its parental forms. An F1 interspecific hybrid was obtained through the embryo culture technique. A decrease in the chiasma frequency and an increase in the frequency of univalents and meiotic abnormalities compared to their parental forms were detected in hybrid plants. The number of univalents and the percentage of main impairments decreased, as the height of bud tier locations increased. A conclusion was made regarding the connection between the regularity of meiosis in the examined F1 interspecific hybrids of Lycopersicon esculentum × Lycopersicon chilense, on the one hand, and the hybrid nature of genotypes and the influence of environmental factors, on the other hand.
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