Resistance of spring durum wheat varieties to stem rust on the background of natural infection

Abstract

The scientific study presents the results and indicators of the cultivation of spring durum wheat in the world, the main varieties of spring durum wheat in the south-east of Kazakhstan, the development of stem rust on durum wheat varieties (Triticum durum Desf.), data on the stability of varieties in grain-bearing regions of the republic. Field experiments were conducted in the conditions of the foothill zone of the Almaty region in 2022. The object of research was 15 varieties of spring durum wheat of various origins: Gordeiforme 254, Nauryz 2, Nauryz 6, Seymour 17, Milana, Salauat, Zhakut 20 (Kazakh Research Institute of Agriculture and Plant Growing), Altyn dala, Asangali 20, Sharifa (Karabalyk Agricultural Station), Damsinskaya jubileinaya (A.I. Barayev Research and Production Centre for Grain Farming), Bezenchukskaya 182, Kanysh (Russia), Berillo (Italy), Kamillaroi (Australia).Under natural conditions, the manifestation of stem rust (Puccinia graminis f. sp. tritici) on spring durum wheat varieties was late, in the phase of flowering and filling of plant grains. In the experience, many varieties of Kazakh and foreign breeding have shown moderate resistance and susceptibility to the disease. In the varieties Salauat and Zhakut 20, the initial and subsequent development of the disease did not exceed 20%, which is a sign of Slow rust development. With a strong lesion of the Nauryz 2 variety (60%), Gordeyforme 254, Milana, Nauryz 6, Damsinskaya jubileinaya, Altyn Dala, Asangali 20, Berillo and Kamillaroi were moderately susceptible. The Seymour 17, Sharifa and Kanysh varieties showed moderate resistance to stem rust.