Abstract
The study assessed spring bread wheat varieties and hybrids grown in the dry-steppe zones of the Akmola and Karaganda regions to identify the most productive and climatically adapted genotypes. The analysis focused on key breeding parameters such as spike length, grains/spike ratio, grain weight per spike, number of spikelets, and overall yield. In the Akmola region, the highest yield among the early-maturing varieties was demonstrated by Line 1617 ae9 (396.6 g/m²). In the medium-maturing group, the variety Xi Chun 911 was the leader with a yield of 357.6 g/m², while in the late-maturing group Long Chun 31 showed the highest productivity, reaching 458.4 g/m². In the Karaganda region, the varieties Lutescens 13-15 and Favorit showed stable yields of 257 g/m², while the most productive variety among the medium-maturing group was Lutescens 2223 (259 g/m²). In addition, several promising hybrid combinations—Silantiy × Favorit, Chelyaba 80 × Karagandinskaya 31, and Karagandinskaya 30 × Novosibirskaya 31—were identified as having strong potential for further breeding. The results confirm the value of the investigated material as a basis for developing high-yielding spring bread wheat varieties.