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This study was conducted for the preliminary evaluation of sunflower hybrids and open pollinated populations in two separate experiments in 2020. In the first experiment, in Gorgan and Boroujerd regions, seed yield and agronomic characteristics of 24 new sunflower hybrids in the form of simple 5× 5 lattice experiment and in the second experiment, seed yield and agronomic characteristics of the above 24 hybrids plus nine selected populations were evaluated in a simple 6×6 lattice experiment in Karaj and Shahroud regions. In the both experiments Golsa hybrid and in the second experiment, Progress and Lakomka cultivars were planted as check. The results of this study showed that the new sunflower hybrids have higher seed yield while having early maturity. In the first experiment, hybrids No. 19 (SUN99-H19), 5 (SUN99-H5) and 4 (SUN99-H49) with seed yield of 4356, 4240 and 3903 kg / ha, respectively, and in the second experiment, hybrids No. 13 (SUN99-H13), 6 (SUN99-H6) and 3 (SUN99-H3) were ranked first with seed yield of 3468, 3298 and 3214 kg / ha, respectively. Selected populations from Progress (Gonbad), Master and Progress (Karaj) with seed yields of 3194, 3121 and 3088 kg / ha, respectively, were ranked 5th, 7th and 9th, respectively, and were superior to open pollinated check cultivars. The results of this study showed that in addition to breeding and preparing new and high-yielding hybrids, selection in favor of suitable agronomic characteristics has led to improved yield of open pollinated cultivars, and this paves the way for the introduction of new open pollinated cultivars whose seed production is associated with less problems.Keywords: Hybrid, Open pollinated, Preliminary, Selection
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