Adaptive ability and stability genotypes of vegetable peas of different ripeness groups

Relevance. The aim of the work is to define the adaptive ability and environmental plasticity of pea genotypes of different ripeness groups which were selected in Krymsk EBS VIR Branch in special conditions of Krasnodar region.

Materials and methods.Eleven pea varieties and one pea strain were sown for studying in fields of Krymsk EBS VIR Branch in 2013-2017. The area of the plot was 10 m2. Each variety was sown three times. The recording of the harvest was made in period of industrial ripeness. The share of influence of different factors on the yield of pea was defined with the help of mathematical methods. The differential ability of environmental and adaptive ability of genotypes, stability and environmental plasticity were also defined.

Results.2013 was the most unfavorable year because of the bad weather conditions. That year the pea yield was only 5/1 tons per hectare. We detected a great influence of the environmental factors (38%), the genotype factors (31) and their cooperative factors (27) on the yield of pea. The main differential ability of environmental was detected in 2016 and 2016. There were average conditions in 2014. During all years of studying there was a high effect of environmental destabilization which showed the great difference between the yields of the different genotypes. The following genotypes were found: the genotypes with a high total adaptive ability – Kudesnik 2, Vesta (k-9352) Berkut (k-8856), G-344/16; stable genotypes – Krasavchik (k-9449) and Istok (k-9353); the genotypes with an environmental plasticity – Alpha (k-7071), Vesta (k-9352), Parus (k-9350), G-344/16. The varieties which were found for breeding purposes on the totality of different characteristics of adaptability, stability and environmental plasticity are Prima (o155213) of a very early ripeness group, Vesta (k-9352) – medium-early, Parus (k-9350, leafless) –medium and the G-344/16 – medium-late. 

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