Assessment of adaptability of spring soft wheat varieties in forest-steppe conditions of the Middle Volga region
The purpose of the research is to evaluate the adaptability parameters of zoned and promising varieties of spring soft wheat and to identify samples that combine high grain yield and adaptive properties for forest-steppe conditions of the Middle Volga region. The work was carried out in 2017-2020 in the central zone of the Samara region. Methods. The object of research was 12 varieties of competitive testing related to different stages of breeding. Observations and records were carried out according to the Methodology of the state variety testing of agricultural crops, assessment of the adaptability of varieties according to the methods of A. A. Goncharenko and L. A. Zhivotkov. Weather conditions in 2017-2020 were diverse and varied from the average annual values. Results. The average crop yield varied from 2.10 t/ha (2019) to 3.72 t/ha (2017), the coefficient of variation C v = 23.8 %. Varieties with a high average grain yield (3.15-3.26 t/ha) and a smaller variation (19.9-22.5 %) were identified - Eritrospermum 6310/ 10-63 , Lutestsens 6102/ 1-32 , Eritrospermum 6517/ 24-1 . The varieties Eritrospermum 6310/ 10-63 (-1.39), Eritrospermum 6381 (-1.50), and Kinel'skaya 59 (-1.50) had the greatest resistance to stress. Varieties Lutestsens 6045, Kinel'skaya yubileynaya, Lutestsens 6102/ 1-32 - differed in specific adaptation and formed the highest average grain yield (3.16-3.20 t/ha) under contrasting conditions. The average coefficient of adaptability of varieties ranged from 0.85 to 1.08. The majority of varieties (58.3 %) had a high coefficient of adaptability (greater than 1), the highest values (1.08) were the promising varieties Lutescens 6102/ 1-32 and Erythrospermum 6310/ 10-63 . Scientific novelty. A new adaptive material of spring soft wheat has been isolated for use in breeding programs of the forest-steppe zone of the Middle Volga region.