study of collection samples of spring wheat carrying the resistance gene lr23 in the environmental conditions of the novosibirsk region

The aim of the study was to identify sources of high expression of agronomic traits of spring wheat and their complex based on the study of collection varieties (2010–2022) carrying the resistance gene Lr23 for breeding in the ecological conditions of the Novosibirsk region. Field studies were carried out in the fields of the Siberian Research Institute of Plant Production and Breeding – a branch of the Federal Research Center Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences in 2010–2022. Thirty-four varieties of spring wheat of different geographical origin were studied under infectious background conditions (damage assessment according to the Peterson scale) and in field conditions (study according to the VIR method). Indicators of damage by powdery mildew and leaf rust of wheat at infectious field was Skala cultivar, and under conditions of natural spread of infection are Novosibirskaya 67 (2015–2016) and Khakasskaya (2017–2022). The yield and productivity characteristics were study using the VIR methodology, with the Novosibirskaya 15, Novosibirskaya 31 and Sibirskaya 17 varieties serving as standards. The content of macro- and microelements was determined using atomic absorption spectrometry on ContrAA 800 D device. Sources of resistance to leaf rust in wheat under infectious background conditions were identified, carrying the Lr23 gene together with other effective genes (Lr19, SR). In field conditions, the following varieties were not affected by leaf rust (99 points): Meri M 82, Pastor, Lutescens 540, and Yugo-Vostochnaya 2; very high resistance (9 points) was observed in the following varieties: LT-2, Prokhorovka, Gala, Hybrid 21, Dimitrovka 5–14 IZR, Lee, Tulaikovskaya 1, Pyramida, Red River 68, and PV-18. The following varieties had yields at the standard level: Zlata (423.4 g/m²), Khayat (488.2 g/m²), Uralosibirskaya (541.5 g/m²), Olimp (431.1 g/m²), and Bulyak (553.0 g/m²). Sources of high nutrient content in grain can be the following varieties: Sonora 64 (Cu - 4.40, Mn – 51.0, Zn – 42.1, Fe – 62.1, Mg – 1637.5 and K – 5294.0 mg/kg), Pyramid (Cu - 5.22, Mn – 56.3, Fe – 63.1 and Mg – 1616.5 mg/kg), Inia F 66 (Cu – 5.13, Zn – 47.0, Fe – 65.2 and Mg – 1728.5 mg/kg). We recommend these varieties to breeding for resistance, high yield and high content of micro and macronutrients in grain.