Search academic texts

Information × Registration Number 0226U000659, (0125U000582) , R & D reports Title Modern methodological aspects of race identification of powdery mildew Blumeria graminis (D.C.) speer f. sp. tritici em Marschal of wheat popup.stage_title Сучасні методологічні аспекти ідентифікації рас борошнистої роси пшениці Blumeria graminis (D.C.) speer f. sp. tritici em Marschal Head Vasyliev Oleksii A., Кандидат сільськогосподарських наук Registration Date 14-01-2026 Organization Plant Breeding and Genetics Institute - National Center of Seed and Cultivar Investigation popup.description1 Development of a new set of differentiators for the identification of races of Blumeria graminis (D.C.) speer f.sp.tritici em Marschal, their special coding and letter designation. popup.description2 Scientific and methodological recommendations have been developed for the analysis of the racial composition of the pathogen of wheat powdery mildew Blumeria graminis f. sp. tritici. They are based on a new set of 16 differentiators —wheat lines and cultivars carrying effective Pm resistance genes (from Pm1a to Pm37), with special race coding and letter designation. From the pathogen population, 75 monoconidial isolates were isolated and tested on 64 lines. The highest resistance (score 9) was shown by carriers of Pm4a+ and Pm20, high (score 8) - Pm17 and Pm25. Moderate (score 7) had Pm4b, Pm5a, Pm6, Pm7, Pm8, Pm34, Pm35, Pm37; weak (score 6) - Pm10, Pm11. Genes Pm1 and Pm2 proved ineffective (score 4–5), others—highly susceptible. In the population, virulence dominates to Pm1a, Pm2, Pm3c, Pm5a, Pm6, Pm7, Pm8; very low—to Pm17, Pm20, absent—to Pm4a+ and Pm25. Nover's set (1957, 9 cultivars) is outdated: its genes are ineffective, coding is cumbersome, and data insufficient for breeding in southern Ukraine. The new set (Pm1a, 2, 3c, 4b, 5a, 6, 7, 8, 10, 11, 17, 20, 25, 34, 35, 37) with improved methods of monoisolate isolation, propagation, and phytorating on benzimidazole allows precise determination of racial composition, virulence, aggressiveness, and gene efficacy. This is the first such method in Ukraine, comparable to the world's best, and key to successful breeding of resistant wheat Product Description popup.authors Vita A. Traskovetska Oleksandr S. Ochkala Maryna A. Bushulian Nadiia I. Sauliak popup.nrat_date 2026-01-14 Close