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Research Article Open Access
To investigate the relations of agronomic traits in some hybrids of sunflower, 20 hybrids obtained from line × tester crosses of five cytoplasmic male sterile lines with four fertility restorer lines were evaluated in a randomized complete block design with three replications at Agricultural Research Station of the University of Tabriz. Data were collected for agronomic traits such as date of flowering initiation, date of flowering end, plant height, stem diameter, head diameter, date of maturity, head dry weight, number of seeds per head, empty seed number per head, grain weight per head, grain yield, 1000-seed weight and oil content. Positive and significant correlation were found between the grain yield and stem diameter, head diameter, number of seeds per head, plant height, grain weight per head, head dry weight; and between the oil content with the grain weight per head and number of seeds per head. Multiple regression analysis and path analyses of grain yield with yield components and some agronomic traits indicated that head diameter, number of seeds per head and stem diameter are important factors demonstrating grain yield. It seems that indirect selection for grain yield in segregating generations through these traits will be effective for extracting desirable genotypes.
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Author(s): F. Hassanzadeh, M. Toorchi, M. Moghadam, S. Aharizad, M. Ghaffari