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¹ Pamuk Araştırma Enstitüsü Müdürlüğü, Aydın
² Orta Karadeniz Geçit Kuşağı Tarımsal Araştırma Enstitüsü Müdürlüğü, Tokat
³ Koyunculuk Araştırma Enstitüsü Müdürlüğü, Balıkesir DOI : 10.21566/tarbitderg.281873 - This study was caried out to determine the superior F1 combination with desirable fiber quality properties for Nazilli conditions. For this aim Şahin 2000, BA 308 and Lider (Gossypium hirsutum L.) cotton varieties was crossed by Delcerro [(G. hirsutum x G. barbadense F1) x (G. arboreum x G.thurberi x G. hirsutum)] superior variety with fiber characteristics. F1 generation and their parents were planted according to randomized complete block design with four replications in 2012. As a result of conducted research seed cotton yields for parents ranged between 86.50 to 78.40 g plant-1, ginning outturn 40.20 to 30.7%, fiber length 34.57 to 28.88 mm, fiber fineness 4.32 to 4.70 micronaire, fiber strength 44.83 to 29.08 g tex-1, short fiber index 8.93 to 6.85%; seed cotton yields for crosses ranged between 88.75 to 67.70 g plant-1, ginning outturn 38.08 to 34.38%, fiber length 33.85 to 32.30 mm, fiber fineness 4.93 to 4.12 micronaire, fiber strength 41.10 to 35.68 g/tex, short fiber index 8.20 to 6.85%. Positive significant heterosis were determined in one combinations for seed cotton yields, ginning outturn and fiber strength. Negative significant heterosis were determined in one combinations for seed cotton yields and short fiber index, in two combination for fiber strength. Keywords : Cotton, hybridization, heterosis, useful heterosis