Evaluation of Allelopathic Potential of 70 Wheat Genotypes Against wild oat (Avana fatua) and Wild Barley (Hordeum spontaneum)

Allelopathic potential of wheat and genotypic variation among cultivars has been observed in several studies. An experiment was conducted using 70 wheat genotypes, in order to recognize and screening wheat cultivars with high allelopathic potential against Avena fatua and Hordeum spontaneum. Wheat genotypes sown in pot and after seedling development, they divided to different parts including leaf, stem and root. After drying four concentrations including 0, 25, 50 and 100% of water extract were studied on germination of wild barley and wild oat. For each weed germination percentage, radicle and hypocotyle length were measured. The results showed considerable variation in inhibitory potential of wheat genotypes. Among different plant parts, leaf and stem have higher allelopthic effects than root. The highest inhibitory effects on observed in Rasool, Mahdavi, Navid, Karaj1, Adl1, Gaspard, Gascogen, Arvand, Baiat and Azadi respectively against the both weeds. The results indicated that some wheat genotypes had more allelopathic potential that can be used in weed management programs. There is also, a selective inhibitory in wheat allelopathic properties.