DISEASE MONITORING TO DETERMINE THE LEVEL OF SPREAD AND DEVELOPMENT OF THE PATHOGEN PYRENOPHORA TRITICI-REPENTIS IN KAZAKHSTAN

Abstract

Tan spot, caused by the fungus Pyrenophora tritici-repentis, is economically important foliar disease in Kazakhstan. Monitoring of crops in the farms of the Almaty region was carried out to determine the spread and degree of development of tan spot, as well as the collection of infectious wheat material for further study of virulence. The aim of the study is disease monitoring and to identify the genotypic potential of resistance to tan spot of cultivated wheat cultivars. As a result of the research, 18 (52.9%) cultivars and lines (Karasai, Matai, Bogarnaya-56, Taza, Kozha, Daulet, Asiada, BARU, Kazakhtanskii yantar, Satti, Kazkhastanskaya 10, Almaly, Zhetisu, Naz, Bezostaya 1, Brazilskaya elita, Brazilskaya ozimaya and Bezostaya 100) resistant to tan spot were identified. As a result of the selection and genetic study of promising wheat lines and cultivars, it is shown that it is recommended to use selected promising wheat lines and cultivars in Almaty region, which showed resistance to diseases, as a promising material in breeding for disease resistance. In the future, these 18 cultivars will be studied at subsequent stages of the breeding process in order to create new high-yielding varieties of winter wheat.