Bazı Pamuk (Gossypium hirsutum L.) Genotiplerinin Doğu Akdeniz ve GAP Bölgesine Uyum Yetenekleri ile Stabilite Analizleri

Abstract

The main goal of cotton breeding is high yield that affected by the genetic potential of genotypes, environment and cultural applications during the season. This study was conducted to evaluate adaptability and stability of twelve cotton (Gossypium hirsutum L) genotypes in four different environments (Kahramanmaraş, Şanlıurfa, Diyarbakır and Kızıltepe/Mardin) in Turkey and effects of genotype x environment interaction on seed cotton yield in the years of 2006 and 2007. The all experiments in the environments were conducted as randomized complete blocks design with three replications. As average of two years, significant differences were determined among environments, years and genotypes for seed cotton yield. Average seed cotton yield of genotypes ranged from 420.5 kg da-1 (Stoneville 468) to 314.6 5 kg da-1 (ÇA 3) while the averages of years were 394.2 kg da-1 (2006) and 350.6 kg da-1 (2007). The genotypes were tested by stability parameters such as environmental index, genotypes index, mean of genotypes , within-genotype mean square , coefficient of variation , ecovalence , stability variance, regression coefficient, deviations from regression mean square , coefficient of determination , regression line intercept (a), standard error of averages, variance and standard deviation. The results indicated that genotypes BA 308 and Dicle 2000 were the most productive with high mean yield and suitable for all the environments. Genotypes Stoneville 468, BA 119 and Erşan 92 can be suggested for relatively worse environmental conditions than BA 308, Dicle 2000 and Maraş 92.