Association of seed yield with some agronomic traits in sunflower (Helianthus annuus L.) varieties
1997
Haile Kefene (Agricultural Development Bureau of Oromiya, Addis Abeba (Ethiopia)) | Efrem Bechere | Hailu Gebremariam
An experiment consisting of twenty sunflower (Helianthus annuus L.) varieties from seven geographic origins of the world was conducted at Awasa and Arsi-Negelle Research Centers in 1992/93 in randomized complete block design with three replications. The objective of this study was to determine the association between seed yield and yield attributes so that the major traits of importance could be determined to serve as the basis for selection program in sunflower since information on this aspect is scanty under our conditions. The results of the present study revealed that seed yield was highly and significantly correlated with number and percentage of filled seeds per head, 1000-seed weight, harvest index, total above ground dry matter weight and stem diameter. The results of the path analysis showed that, of all traits considered under the study, number of filled seeds per head and 1000-seed weight exerted the highest direct and indirect effects on yield. Therefore, seed yield in sunflower is largely determined by number of seeds per head and 1000-seed weight, and hence, it is suggested that selection for these important traits will lead to the improvement of seed yield in sunflower.
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