Winter barley Collie C1

Collie is a new, two-row winter barley variety of the fodder type, bred by Saatzucht Josef Breun and registered in Germany in 2024. The variety stands out for combining very high yield potential, excellent health, and exceptional ability to regenerate after winter. The most important feature of the variety is resistance to both types of barley yellow dwarf virus (BaYMV). In tests by the German Federal Office for Variety Testing (BSA), Collie received the highest possible resistance rating – 9 points on a nine-point scale. This result confirms an exceptionally high level of crop safety under the threat of this serious viral disease. BSA studies also showed a very high tillering capacity of the variety, rated at the maximum 9/9. Collie is also characterised by a high thousand grain weight (TGW), which received a rating of 8/9. Thanks to the low plant stature, the variety shows high resistance to lodging, which further contributes to yield stability and production security. Particular attention should be paid to the yield results. In BSA trials, the Collie variety was the highest yielding winter barley in both basic (A1) and intensive (A2) technology in 2024 and 2025. In 2024 it received a rating of 7/9 in A1 technology and 8/9 in A2, while in 2025 it scored 7/9 in both A1 and A2 technologies, maintaining its leading yield position. The high production potential was also confirmed in studies conducted by SDOO on behalf of Agrosimex at several locations in Poland. Collie proved to be the highest yielding two-row barley variety, while also winning among multi-row varieties. The variety also shows very good winter hardiness and regeneration ability after the winter period. In the 2025/2026 season, when many plantations of other varieties required destruction and reseeding, Collie effectively rebuilt the stand after winter, showing no visible losses in plant density. The two-row type of the variety translates into a high thousand grain weight and greater grain thickness compared to multi-row varieties. In practice, this means a lower husk proportion and better grain uniformity. Thanks to these features, Collie is used not only in fodder production but also represents an interesting raw material for the processing industry, including for groats production. The combination of record yields, highest resistance to barley yellow dwarf virus, very high tillering capacity, and excellent post-winter regeneration makes Collie one of the most interesting new winter barley varieties available to agricultural producers.