محيط و پايداري عملكرد در دو رگ هاي جديد پنبه از طريق روش هاي پارامتري X بررسي اثر متقابل ژنوتيپ

The assesment of genotype*environment interaction and yield stability on new cotton hybrides using parametric methods

Different responses of crop varieties to various environmental condition characterized as Genotype *environment interaction. Evaluation of G*E interaction is very important for releasing of new and stable variety of the plant in different regions. In this study, the adaptibility of seven hybrid gentoypes of cotton ,along with two controls (Sahel and varamin) were evaluated in five regions of Golestan province for two years. The seeds of genotypes were planted in a completely randomized block design with four replications. Simple and combined analysis of variance indicated significant difference among genotypes for evaluated traits. These analysis also showed that there are consider interaction between genotypes by location over years. Results indicated that hybrid coker 3l2*C 121 1 for yield, hybrid coker 312* 153F for maturity and hybrid Hopicalax 349 were better than control (Sahel). To study mode of stability for the genotypes we use indexes such as Regression coefficient, Deviation from regression, coefficient of determination. The results showed the hybrid coker 312*C1211 had a great and suitable stability for most regions of Golestan Province. Also The findings revealed that study of stability for cotton genotypes is very important in Golestan regions, because evaluated locations in this study were highly valuable in response to environmental conditions over the years.