Genotype - Environment Interaction for Oil Percent in Sunflower Varieties Using AMMI Method

The interaction between genotype and environment is reason that researchers evaluate new cultivars in wide range of environmental conditions. These information is very useful in determine of cultivar stability and regional adaptability. In order to evaluate stability of open pollination sunflower cultivars for oil percent، an experiment on 10 open pollinated sunflower varieties in five agricultural research centers: Karaj، Urmia، Bojnourd، Shiraz and Islamabad in a randomized complete block design with four replications were done. The interaction of genotype and environment investigated with AMMI method. Three interaction principal components explain over 95 percent of the total variance. In the AMMI1 biplot graph the cultivars: Master، Bulg5، Bulg3 and Islamabad and Bojnourd environments were high in IPCA1 factor and show the greatest influence on interaction effect. Berezans، Favorit، Lakumba، Record and Zaria cultivars and Karaj، Shiraz with Urmia environments have the low IPCA1 and high stability. Base oil performance and stability، Zaria cultivar was the best cultivar. In the AMMI2 biplot graph، Lakumka and Zaria had the least interaction with high common adaptability. Base this graph bulg3 cultivar in Islamabad، Berezans in Karaj and Shiraz، bulg5 in Bojnourd and Favorit and Record in Urmia had the specific adaptability.