Abstract: This study was carried out to determine the yield, yield components and the quality characters of two cotton cultivars Ogosta 644 and Sayar 314 and their generations of F1, F2, BC1P1, BC1P2 obtained by crossing them in the years between 1996-1998 in Diyarbakir. In the study, the number of boll per plant, seed cotton weight of per boll, seed cotton yield, plant height, rate of first picking, ginning turnout, 100 seed weight, fibre fineness, fibre length and fibre strength were determined and heterosis, heritability, F2 depression, F2 deviation were estimated. As a result, it was determined that seed cotton weight of per boll, 100 seed weight, fibre fineness and fibre strength had high heritability degrees, the number of bolls per plant had lower heritability degrees, while the other characters had moderately heritability degrees. The characters which were high heritability degrees have been suggested some possibilities in obtaining required genotypes by selection in early generations (F2, F3); delayed selection which had low heritability strongly recommended for some characteristics.