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In this study, 15 new grain maize hybrids along with a check hybrid (Single Cross 704) were evaluated over a two-year period across the regions of Karaj, Shiraz, Kerman, Moghan, Mashhad, Kermanshah, Jiroft, and Dezful. The two-year average grain yield comparison revealed that hybrids No. 2 (KLM91015/2-2-1-1-1-1-2-1 × K47/221), 5 (YS16B-158-66-2 × B73), 4 (KLM91015/2-2-1-1-2-1-2-1 × K47/221) and 3 (KLM91015/2-2-1-1-2-1-1-1 × K47/221) with grain yields of 13.52, 12.81, 12.68, and 12.49 tons per hectare, respectively, were identified as superior hybrids due to their high yield performance. These hybrids produced significantly higher grain yields compared to the check hybrid, Single Cross 704 (Hybrid No. 16), which had a yield of 11.59 tons per hectare. The top-performing hybrids showed no significant differences with the check in terms of maturity duration and grain moisture percentage, but exhibited better yield stability in comparison to the check hybrid. Therefore, if these hybrids demonstrate resistance to smut and Fusarium diseases and maintain their yield performance in extension trials, they can be introduced to farmers as new commercial hybrids.
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