Meiotic mutat томату controlling exit from meiosis

Abstract

Aims. This paper presents the results of cytological and genetic analysis of new meiotic mutant of tomato (Lycopersicon esculentum Mill.). Methods. Studies on meiosis in microsporogenesis were made in iron-acetocarmine smears of anther fixed in acetic alcohol (3:1). Results. Cytological analysis revealed the normal course of meiosis until anaphase II, after which there is an additional second division of meiosis without S - phase. Meiotic mutation tomato amd (additional meiotic division) is monogenic recessive nature of inheritance. Mutant plants exhibit a complete male sterility but normal female fertility. Conclusions. Meiotic mutant of tomato amd controls the completion of meiosis.

Key words: Lycopersicon esculentum, meiosis, meiotic mutants, additional meiotic division.