Анотація:
Aims. This paper presents the results of cytological and genetic analysis of new meiotic mutant of tomato (Lycopersicon esculentum Mill.) sti. Methods. Studies on meiosis in microsporogenesis were made in iron-acetocarmine smears of anther fixed in acetic alcohol (3:1). Results. Cytological analysis revealed that starting from the stage dyplotene and diakinesis chromosomes showed defects in condensation by fuzzy contours, irregular chromosomes condensation, intertwined chromatin, non-homologous chromosomes and univalents that are difficult to identification. Meiotic mutation tomato sti (stickyness) is monogenic recessive nature of inheritance. Mutant plants exhibit a high male and female sterility. Conclusions. Meiotic mutant of tomato sti is defected in chromosome condensation.
Key words: meiosis, meiotic mutants, chromosome condensation, Lycopersicon esculentum Mill.