RESPONSE OF COTTON (Gossypium hirsutum L.) HYBRID (F5-6) TO CLIMATIC DIFFERENCES IN TERM OF YIELD AND YIELD COMPONENTS

Cotton yield is affected by environmental conditions. This study was carried out to determine the population means response in eleven hybrids and three check cotton cultivars to climate changes in Antalya-Turkey, in 2017 and 2018. Temperature, relative humidity and precipitation in these years were found to have varied in Antalya. In the May-October period of 2018, the totals of average and maximum temperature were seen higher than in 2017 as opposed to the total of minimum temperature, but the distribution of temperature, relative humidity and precipitation varied according to months. While the genotypes affected by this situation had taller height and more fruiting branches in 2018, they created fewer vegetative branches, had a lower ginning outturn and fewer bolls. On the other hand, while the in Flash cultivar the number of bolls decreased in 2018, in Gloria the loss ratio of bolls minimized. Furthermore, in Sure Grow 125 the seed cotton yield per boll increased and the yield reduced, lower ginning outturn and boll losses were observed that affected fiber yield. As a result of the study, it has been determined that Sure Grow 125 has a high tolerance to climate change and maintains its yield potential and Gloria variety had higher yield at low temperatures, while the hybrids have the genetic potential to increase seed cotton yield in Antalya.