Identification of genetic immunity to the warrior race and local population of stripe rust using conventional techniques in winter wheat genotypes

Authors : Emrah KOÇ, Emine Burcu TURGAY, Fehmi KOZVEREN, Beyhan AKIN

Pages : 30-41

Doi:10.29050/harranziraat.1177052

View : 19 | Download : 11

Publication Date : 2023-03-24

Article Type : Research Paper

Abstract :Wheat stripe rust caused by the Puccinia striiformis f. sp. tritici insert ignore into journalissuearticles values(Pst); is a major and devastating biotic stress inducing notable product losses in wheat insert ignore into journalissuearticles values(Triticum spp.);. Possibility of the breakdown of important genes conferring resistance against to stripe rust and the threat of emergence of new aggressive races remain a concern in all wheat growing areas around the world. Therefore, breeding programs must continue screening of wide genetic diversity to improve new varieties with different gene combinations against race changes. Within this scope, 140 wheat genotypes obtained from various countries and programs were evaluated in terms of their reactions to stripe rust at both seedling and adult-plant stages in 2020 and 2021 growing seasons. The adult-plant stage evaluations of these genotypes were conducted under artificial inoculation of PstS7 insert ignore into journalissuearticles values(Warrior); race at Haymana location of Field Crops Central Research Institute in Ankara and under naturally occurring local stripe rust population at Menemen location of Aegean Agricultural Research Institute in Izmir. Whereas the seedling stage tests were carried out using the PstS7 race under controlled conditions at Pest and Disease Resistance Unit of the Field Crops Central Research Institute. More than 80% of the genotypes tested at both locations exhibited immune, resistant, and moderately resistant reactions at the adult-plant stage, while only 36.4% of the genotypes exhibited resistance reactions at the seedling stage. The coefficients of infection insert ignore into journalissuearticles values(CI); of the genotypes were calculated by using the stripe rust reaction and disease severity of each genotype. Following scales were used for classification of the genotypes based on the CI: 0 = Immune; 0.1-5.0 = Resistant; 5.01-20.0 = Moderately Resistant; 20.1-40.0 = Moderately Susceptible; 40.1-100 = Susceptible. In conclusion, 101 genotypes insert ignore into journalissuearticles values(72.1%); evaluated at both locations were found to be immune, resistant, and moderately resistant to both the PstS7 race and local stripe rust population. These genotypes have been proposed as resistance gene sources for cultivars to be developed.
Keywords : Kışlık buğday, çizgili pas, dayanıklılık, warrior ırkı, yerel çizgili pas popülasyonu