The effect of a vegetation period on protein percentage in seed of the pea collection samples

The purpose of the study was to identify effect length a vegetation period collection samples on protein percentage in pea seed. carried out southern part Rostov region fields FSBSI «ARC «Donskoy» 2017–2020. objects were 100 from N. I. Vavilov ARIPGR (VIR), including 53 leafless and 47 leafy ones. longest average for (93.8 days) identified 2017. intervarietal variability this trait, expressed by variation coefficient, year 5.5 % with minimum value 63 days maximum 101 days. In group varieties type, 6.4 (min. days; max. days), it 4.2 80 days). other years, there reduction decrease its due unfavorable weather conditions form lack shortage precipitation against background elevated high air temperatures. But they also led accumulation seeds samples, thereby showing greatest indicator. calculation correlation coefficient showed absence dependence vegetation, both (r = 0.03+0.10) groups 0.08+0.14) foliate 0.05+0.15) leaf morphotypes. construction graphs errors morphotypes revealed more than 25.0 %. morphotype, had 78–80 83–85 days, 77–79 over years study.