Abstract
The new grain crop triticale is of great interest for cultivation in the soil and climatic conditions of the middle Amur Region; therefore, this study assessed the environmental stability of yield formation for a collection of triticale samples. The varieties with the maximum yields identified in the study were the following: AC Certa (Canada), Lana (Belarus), Dagvo (Russia), Golden Scallop (Russia), Ulyana (Belarus), Uzor (Belarus), Lotos (Belarus), Mykola (Ukraine), Victoria (Ukraine), Sandio (Switzerland), Wanad (Poland) and Yarik (Russia). The AC Certa (Canada) variety was characterised by high demands on growing conditions (St2 = 0.69, A = 30.03) and unstable yield (1.8-7.0 t/ha). The Victoria (Ukraine) variety was characterised by high ecological stability of yield (St2 = 0.99, A = 27.45) in various years (2.5-3.1 t/ha). Results indicated that the yield formation of the collection samples were strongly dependent on weather conditions (R=0.554). Lastly, a model of spring triticale yield formation dependent on weather factors was constructed using regression analysis. The most significant climatic factor was photosynthetically active radiation during the active vegetation period
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