Evaluation of Relationship between Agronomical and Physiological Traits of Soybean and Grouping of Soybean Genotypes under Different Amount of Sulfur Application

To determine the relationships between agronomic and physiological characteristics of soybean, 30 soybean genotypes in factorial experiment based on a randomized complete block design were planted in Sari of Agricultural Sciences and Natural Resources University (SANRU). Correlation coefficients between traits showed positive and significant correlation between the considered traits and grain yield except 100- grain weight. Path analysis for grain yield showed that maximum positive direct effect is related to chlorophyll b content that imply the important role of this trait in grain yield. This trait can be used as indirect selection for genetic improvement of grain yield. Cluster analysis based on Ward method has divided the soybean genotypes into two distinct groups. The first group genotypes due to high level of traits were identified as highly valuable sources in breeding programs.