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Forage production from autumn legumes was proposed as a solution to adapt to drought stress and climate change. In current research, Nine lines of low tannina of Faba bean with low tannin control variety (Mahta) and high tannin control (Shadan) was studied. The experiment was studied in four regions (Gorgan, Ghrakhil, Brojerd and Dezful) in the form of randomized complete block design in three replications during 2022-2023 and 2023-2024. Traits such as days to 50% flowering, days to harvest, plant height, number of branches, number of pods per plant, number of seeds per pod, fresh forage yield, dry forage yield, components of forage yield (percentage of leaves, stems, and pods fresh and dry) and some forage quality traits (percentage of protein, acid detergent insoluble fiber, neutral detergent insoluble fiber, and crude fiber percentage) were measured. The results of the combined analysis of variance showed that all traits were significant in the studied regions (Dezful, Gorgan, Borujerd and Qarakhail). results showed that the average fresh forage yield of the studied genotypes varied between 639.17 and 7388.9 kg.ha-1 and genotypes 4 and 7 produced the highest and lowest fresh forage yields, respectively. The average fresh forage yield of genotypes 9, 8, 4 and 1 was also higher than average yield of all genotypes. Among the genotypes studied, genotype 8 had the lowest plant height (95.1 cm) and genotype 4 had the highest plant height (105.4 cm). The highest days to flowering and days to harvest were obtained from genotype 8 with122.7 and 198.8 days, respectively. Also, the highest and lowest forage protein percentages were obtained from genotype 4 and cultivar Shadan with 14.9 and 12.1 percent, respectively. Genotypes 9 and 4 had desirable traits in all studied locations in terms of plant height, fresh and dry forage yield, and also desirable quality traits (high protein and low fiber). Therefore, after evaluation of these genotypes under farmers' conditions, they will be able to be introduced as suitable forage varieties.
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