The estimation of the adaptability of collection pea plants productivity

The current paper has presented the study results of the estimation of the adaptability of plant productivity of 131 collection pea samples in the southern zone of the Rostov region, carried out according to the method proposed by V. V. Khangildin (1984). The most agroecological methodologies of estimation have significant drawbacks. Firstly, these are calculations, which are difficult to be done. Secondly, it is the effect of the indicators of other samples on the final index of homeostaticity for the selected sample. The fact is essential when working with a large number of samples, i. e. collection, which has defective and annually updated material and if the composition of the collection changes, it is not necessary to recalculate homeostatic parameters according to the method proposed by V. V. Khangildin. Meteorological conditions during the years of research were characterized with unstable weather conditions, which made it possible to objectively evaluate samples under different vegetation conditions. According to the 2017– 2019 studies there were identified the samples “Tatyana” (Russia), “Damir” (Denmark), “19/91 C” (Portugal), “Mutant 561” (Russia), “Kudesnik” (Belarus) with a large “seed weight per plant”. The indicators of stress resistance and homeostaticity of these varieties’ productivity were average for the collection. The greatest homeostaticity of this indicator was identified in the samples “193/73” (Ukraine), “6995x6575” (Russia) with the average “seed weight per plant” for the collection. The study results of the homeostaticity of the collection pea plants productivity will be used as initial material in further breeding work.