THE EFFECT OF GAMMA IRRADIATION AT DIFFERENT DOSES APPLIED TO SAYAR-314 AND ACALPI-1952 COTTON VARIETIES SEEDS ON YIELD, YIELD COMPONENTS AND FIBER TECHNOLOGICAL PROPERTIES IN M^sub 5^ GENERATION

This study was conducted to determine the effects of different gamma irradiation doses yield, yield components and fiber technological properties on cotton varieties of Acalpi-1952 and Sayar-314. The seeds of each cultivar were irradiated by 100, 200, 300 and 400 gray doses at The Foundation of Türkiye Atomic Energy. M1, M2, M3 and M4 generations were grown between 2000-2004 cotton growing period and 11 lines coming from Sayar-314 variety selected from M4 generation and 6 lines selected from Acalpi-1952 variety selected from M4 generation. Selected all mutant lines and Sayar-314 and Acalpi-1952 were sown as parent varieties. Stoneville-453 and Sayar-314 varieties were growing as check varieties of region. Important agricultural and technological characters such as plant height, number of monopodial branches, number of sympodial branches, number of bolls, boll weight, boll seed cotton weight, 100 seed weight, first picking hand ratio, seed cotton yield, ginning outturn, fiber length, fiber strength and fiber fineness were investigated in M5 generation. According to results; Positive and negative variations were observed with respect to the control cultivars depending on the irradiation doses.