EVALUATION OF ADAPTIVE CAPACITY OF PROMISING SPRING DURUM WHEAT LINES IN OMSK REGION CONDITIONS

Field research was carried out in 2018-2019 on the premises of Omsk Agrarian Research Centre, exactly the breeding crop rotation of the laboratory of durum wheat breeding as well as at the reference point of seed production in the steppe zone in the village of Novouralsky Tavrichesky district of Omsk region. The experiments were conducted in a complete fallow. The area of the plots was 10 m², repeated four times, the location was random. Weather conditions during the vegetation period of 2018 were contrasting both in terms of precipitation and temperature. Grain formation took place in late August - early September, which had a significant impact on grain quality. In 2019, atypical meteorological conditions were observed: favorable in the first vegetation period and arid - in the second (Volga type of drought). The productivity of durum wheat lines was estimated in terms of adaptive capacity and stability. Scientific data on the parameters of grain quality and disease resistance are highlighted. Yields of durum wheat lines varied considerably depending on agro-climatic conditions of the year and cultivation background. The best conditions for the growth and development of genotypes were set up in the southern forest-steppe zone of Omsk, the maximum crop yield was observed in the Gord. line 08-67-1, Gord. 09-68-1, Gord. 05-12-7(v), Gord. 08-107-5. The general adaptive ability is close to zero, that shows stability of genotypes in external environment. Specific adaptive ability revealed in the lines: Gord. 10-33-3, Gord. 10-8-4, Gord. 11- 70-7, Gord. 11-77-8, Gord. 11-99-1. The authors highlight the following promising lines according to the experimental results: Gord. 05-12-7(v), Gord. 08-107-5, Gord. 09-68-1, Gord. 08-67-1. Selection assessment of promising lines was carried out on the indicators of grain quality and disease resistance. The following parameters are seen as good quality indicators at the Gord line 11-70-7: weight of 1000 grains is 49.75 g and high resistance to stem rust (6%). According to the quality of grain and weight of 1000 grains, Gord. line 09-68-1 is better than Zhemchuzhina Sibiri, affection of brown and stem rust is minimal that is interesting for selection procedures. The following varieties are valuable from the point of view of breeding, stability of genotype, high productivity, quality of grain and pasta and resistance to disease: Gord. 05-12-7(v), Gord. 08-107-5, Gord. 09-68-1, Gord. 08-67-1, Gord. 11-70-7, Gord. 11-99-1.