همبستگي بين صفات و تجزيه عليت براي عملكرد دانه روغن در گلرنگ بهاره

Correlation Between Traits and Path Analysis for Grain and Oil Yield in Spring Safflower

In order to study correlation among seed and oil yield and their components through the path coefficient analysis method, an experiment with 100 safflower genotypes was conducted at the Research Farm of Seed and Plant Improvement Institute, Karaj in 1997. The experimental design was a 10 x 10 simple lattice. The results showed that there was good agreement between phenotypic and genotypic correlations. For most characters, genotypic correlation coefficients were higher than phenotypic correlation coefficients and there were highly significant positive correlations between biomass and number of capitula 1 plant with seed yield . Stepwise regression for seed and oil yield indicated that four traits including biomass, number of capitula / plant, number of secondary branches entered to model. The results of path coefficient analaysis revealed that increase of oil yield was primarily associated with increasing seed yield which was affected by biomass and number of capitula / plant.