In this thesis, solamargine which is a known eggplant glycoalkaloid and has an important place for human health was characterized in eggplant. For characterization, two eggplant lines S.melongena MM738 and S.linnaeanum MM195 were used. Although, for identification and detection of glycoalkaloid concentration, many different methods have been utilized, for this thesis, high-performance liquid chromatography (HPLC) was used to analyze glycoalkaloid concentration in eggplant. In HPLC, spiking of samples was done using a solamargine standard and it was found that S. melongena had an undetectable level of solamargine while S. linnaeanum had between 17.6 and 33.4 mg (average 25.5 ± 11) solamargine per gram of freeze dried powder. In addition to characterization of glycoalkaloids in S.melongena MM738 and S.linnaeanum MM195, different types of molecular markers were surveyed for polymorphism in S.melongena MM738 and S.linnaeanum MM195 for mapping. A total of 47 polymorphic markers were then tested on the F2 population and located on the eggplant molecular genetic map.