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In this project, the compatibility of nine foreign and Iranian sunflower genotypes in four regions of Karaj, Isfahan, Khoy and Sari in terms of grain and oil yield and agronomic characteristics was evaluated in the form of field value determination test (VCU) for two years (1398 and 1399). The experiment was performed in each region and each year in a randomized complete block design with four replications. Based on the analysis of variance of the studied genotypes using mathematical expectation, there was a significant difference between the experimental genotypes in terms of all measured traits and showed considerable genetic diversity among the studied genotypes. Comparison of yield of four regions showed the superiority of grain yield in temperament compared to other regions. Based on the results of comparing the average of sunflower genotypes in four regions during 1398 and 1399, Oscar, Edison and Fantasia hybrids with the highest grain yield (2981, 2955 and 2914 kg / ha, respectively) were ranked first. The highest percentage of oil was observed in Oscar, Qasem and Edison hybrids (46-45%). Palanchi nut hybrid with 2886 kg / ha grain yield produced more grain yield compared to control of Songhori with 2454 kg (43%) and with a growth period of 98 days compared to Songhari mass (110 days) 12 days It was earlier and with a plant height of 178 cm, it was 51 cm shorter than Sanghari mass (2259 cm). The oil content of these two hybrids was similar and was about 30% (Table 14). Evaluation of hybrid stability based on environmental change coefficient index showed that among the cultivars evaluated, Sanghari nut mass and Ghasem, Shams and Farrokh and then Palanchi hybrids have the lowest coefficient of change. And only two oil hybrids Shams and Palanchi were in the right area with good yield and coefficient of variation. Considering the stability criteria of Lane and Benz, Oscar, Fantasia, Edison, Palanchi and Shams cultivars were distinguished from other genotypes due to high yield and low pi coefficient and were placed in the appropriate region of the two-dimensional chart.
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