Correlations and path analysis of physio-morphological characters of sunflower (Helianthus annuus L.) as related to breeding method
2000
Teklewold, A. (Ethiopian Agricultural Research Organization, Addis Abeba (Ethiopia). HOLLETA Research Center) | Jayaramaiah, H. | Jagadeesh, B.N.
The interrelationships of 12 physio-morphological traits of 144 sunflower genotypes including 66 germplasm accessions, 75 inbred lines and three checks were investigated using 12 x 12 simple lattice design at the University of Agricultural Sciences, Bangalore, India. The study revealed that there were significant positive correlations between seed yield per plant and plant height, number of filled seeds, head diameter, stem girth, 100 seed weight, and harvest index on one side and oil yield per plant on the other. Percent autogamy was negatively correlated with seed yield per plant and other yield-contributing traits. Days to maturity and oil content were significantly associated with seed yield per plant only in the inbred lines. The breeding method followed in developing the genotypes has less influence in altering the magnitude and direction of correlation. Genotypic path analysis revealed that number of filled seeds and 100 seed weight has significant positive direct effects on seed yield per plant. Seed yield per plant followed by oil content had the highest direct positive influence on oil yield per plant. These traits were also the main channels to direct other components to influence the seed and oil yields per plant accordingly.
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