Yield stability and oil and protein content in new and grown Soybean genotypes

Abstract

During 1999 and 2000, investigations were conducted in order to evaluate yield stability and oil and protein content in new and grown soybean genotypes, and to establish correlation's between investigated traits. It has been established that the influence of agroecological conditions on grain yield was high, and only a small number of newly created genotypes surpassed standard varieties. Variability is particularly marked in unfavorable year which was indicated by high coefficient of variation. Oil and protein content mainly depends on agroecological conditions during beginning seed and seed filling period. Few newly created genotypes had higher protein content, which, aside of yield, was main breeding goal. Significantly negative correlation between grain yield and protein content cumbers creation of high-yielding genotypes with high protein content.

Istraživanja sprovedena tokom 1999. i 2000. godine imala su za cilj proveru stabilnosti prinosa, sadržaja ulja i proteina u novim i gajenim genotipovima soje i utvrde korelacije između ispitivanih svojstava. Ustanovljeno je da je uticaj ekoloških činilaca na prinos veoma izražen, te da je mali broj novostvorenih genotipova po prinosu dostigao ili nadmašio standarde. Varijabilnost je naročito izražena u nepovoljnoj godini, na šta ukazuje visok koeficijent varijacije. Sadržaj proteina i ulja u zrnu soje u velikoj meri su zavisni od agroekoloških uslova tokom formiranja i nalivanja zrna. Nekoliko novostvorenih genotipova imaju viši sadržaj proteina od standarda, što je pored prinosa bio glavni cilj selekcije. Izrazito negativna korelacija između prinosa i sadržaja proteina otežava stvaranje visokoprinosnih genotipova sa visokim sadržajem proteina.