PRODUCTIVITY AND BIOCHEMICAL PARAMETERS IN BREEDING LINES OF PEA OF DIFFERENT MORPHOTYPES

Abstract

Data are given from experiments on studying 16 breeding lines of pea of different morphotypes. There was studied relationship between yielding capacity and protein content in pea breeding lines of different morphotypes – leafy, leafless and chameleon. Investigations were carried out in 2012–2014 under conditions of West Siberian forest-steppe areas according to recommended techniques. Pea was sown at the optimal dates by the continuous drill sowing method. The placement of plots was systematic. The pea cultivars Novosibirets and Rus recognized for this agricultural area were taken as standards. It has been found that the current modified forms as a whole are not inferior to leafy samples in yield and protein content, and in some cases exceed them. When determining the protein content in grain, a tendency towards its reduction with the growth in productivity was revealed. There were selected the lines TM-1560, TM-1505, TM-1383, TM-1507, Titan x Taezhny combining high productivity (2.4–2.9 t/ha) and higher grain protein content (23.9–27.7%). The line TM-1505 (chameleon) with layered heterophylly is distinguished by higher parameters of the production process and increased biological potential. These lines are of practical value in breeding work for developing genotypes combining high levels of productivity and protein content under conditions of West Siberian forest steppe. The correlation analysis has revealed significant negative relationship (-0.72) between yield and protein content in lines with the usual type of the leaf in 2012. In the remaining years of study, no significant relationship between these traits was found.