The objective of the study is to evaluate the adaptive properties of field pea accessions in terms of seed yield and protein content for inclusion of the most valuable ones in breeding and cultivation in the Siberian region. The studies were conducted in 2020–2024 at the Omsk Scientific Research Center (southern forest-steppe of Western Siberia) using generally accepted methods. The object of the study was 18 varieties and 3 lines of peas of the whiskered morphotype, bred in Russia and abroad. The ecological variety testing nursery was established mechanized using spring soft wheat as a predecessor on plots of 10 m2 in quadruplicate. Weather conditions from May to August 2020–2024 were generally dry – with dry periods in 2020, 2021, 2023, and 2024. The hydrothermal coefficient ranged from 0.37 to 0.68. The duration of the sowing-to-germination and germination-to-full maturity periods, seed yield, and protein content had a curvilinear relationship with the hydrothermal support parameters. Demos 2, Krasnoufimskij 11, Aksajskij usatyj 55, Yamal'skij, Yuldash, and Vel'vet formed a yield of 3.38–3.47 t/ha on average over 5 years. The Omsk line L 62/14 showed record values for the protein share (average, maximum, and minimum) – 25.5 %, 24.25, and 27.1 %, respectively. According to the complex of assessments, Yuldash and Krasnoufimskij 11 took 1st place; no varieties were in 2nd place; and Aksajskij usatyj, Bonus 2, and L 62/14 came in 3rd; 4th – Vel'vet; 5th – Yamal'skij, Salamanka. This is the most valuable source material for breeding for yield in Western Siberia. Sources for breeding for increased seed protein include L 62/14, Blagovest, Bonus 2, Demos 2, Ruslan, L-21, and L 40. The semi-short-stemmed varieties Bonus 2, Demos 2, and Krasnoufimskij 11, which combine increased seed yield with a protein content of over 24 %, can be recommended for cultivation in the Siberian Region.
Omel'yanyuk et al. (Fri,) studied this question.