Assessment of relationship between grain yield and some related traits in oilseed sunflower genotypes

The purpose of this study is surveying the genetic diversity between oilseed sunflower genotypes and relationships between traits and grain yield, so 12 genotypes cultivated in a completely randomized block design with three replications. Based on the results of analysis of variance, traits were observed among genotypes at a probability level of 1% for the traits of 100 seeds and at 5% probability for the traits of diameter and grain yield of diversity. The results of simple correlation coefficients of traits showed that the diameter of the plant had the highest correlation with plant height and 100 seed weight. The results of simple correlation coefficients of traits showed that the diameter of the plant had the highest correlation with plant height and 100 seed weight. The results of path analysis showed that the highest direct effect on seed yield was observed on seed width and plant height. Using factor analysis by principal component analysis, four factors justify 82.5% of the data variation. The first factor justified 34.2% of the total variance of the data, that named seed yield, the second factor justifying 21.9% of the variation factor that named length factor ,the third factor, justifying 14.5% of the data changes as the factor of 100-grain weight and the fourth factor justified 11.7% of the total data variance, was named dimeter factor.