Shortening rye stems to improve lodging resistance is among the major tasks awaiting breeders of this cereal. The most straightforward way to achieve this goal is the implementation of a dominant dwarfing gene into high yielding cultivars. The choice of dominant dwarfing genes in rye is limited to Ddw1 and Ddw3 loci, which are well characterized with respect to map position and tightly linked molecular markers on the long arms of chromosomes 5RL and 1RL, respectively. This paper reports on the identification and preliminary characterization of a novel dominant dwarfing gene, Ddw4, from line S44. This was mapped within the centromeric region of chromosome 3R. The Ddw4 gene is sensitive to exogenous gibberellin. Its introduction into the rye populational cultivar Dańkowskie Amber decreased plant height by c. 54% without any negative effects on spike length and number of kernels per spike. Further genetic studies are needed to determine the perspectives for application of the newly detected dwarfing gene into breeding programs for short-stem rye.

缩短黑麦茎梗以提高抗倒伏能力是该谷物育种者的主要任务之一。实现这一目标的最直接方法是将矮化基因转化为高产品种。黑麦中矮化显性基因的选择仅限于Ddw1和Ddw3基因座，它们分别在5RL和1RL染色体长臂上的图谱位置和紧密连接的分子标记方面具有良好的特征。本文报道了从品系S44鉴定出一个新的显性矮化基因Ddw4的鉴定和初步鉴定。这被定位在染色体3R的着丝粒区域内。该Ddw4该基因对外源赤霉素敏感。将其引入黑麦种群品种DańkowskieAmber可使株高降低了c。54％对穗长和每个穗的粒数没有负面影响。需要进行进一步的遗传研究，以确定将新发现的矮化基因应用于短茎黑麦育种计划的前景。