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In order to determine adaptability of the bread wheat promising lines, using a randomized complete block design (RCBD) with three replications, 18 promising lines along with cultivars: Tirgan and Kalateh, two commercial cultivars as controls, were evaluated in four experimental field stations; Gorgan, Sari, Gonbad and Moghan for two consecutive years during cropping season (2019-21). All genotypes were also evaluated for major diseases including yellow rust (Yr), leaf rust (Lr), stem rust(Sr), fusarium head blight (Scab), septorios and powdery mildew in special disease nurseries, under artificial inoculating conditions(Mist Irrigation System). To study the adaptation and yield stability of genotypes non-parametric methods and GGE Biplot method were used. Lines with higher grain yield, high adaptability and yield stability, desired agronomic performance and tolerance/resistance to major diseases in northern warm and humid zone were identified. Five promising lines including 8, 14,16, 18 and 20 were selected.
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