Dwadzieścia lat od pierwszej rejestracji odmiany rzepaku ozimego firmy NPZ-Lembke w Polsce

The main aim of the work is to evaluate the breeding progress of winter oilseed rape based on multiannual field experiments and results obtained by Norddeutsche Pflanzenzucht (NPZ) — Lembke breeding company in Poland. After analyzing the results of research, significant progress has been found regarding the yielding of open pollinated and hybrid varieties. The estimated yield potential of hybrid varieties in relation to open pollinated varieties is 10% higher. It is worth emphasizing that both types are characterized by good quality seeds in terms of low aliphatic glucosinolate content, particularly harmful progoitrin, while preserving desirable indol glucosinolates, which protect from cancer. Thanks to such a significant reduction of glucosinolate content, the seeds as well as post-extraction rapeseed meal can be used as valuable high protein fodder. The problem of glucosinolates in rapeseed seeds, despite their low content (0.4%), is still a current breeding problem. Therefore it is still necessary to continue work towards the reduction of glucosinolate content in seeds and to promote rapeseed meal with extremely low glucosinolates as competitive for soybean meal.