The soybean protein is the only complete and available source of vegetable protein. The protein content of grains is a polygenic asset controlled by additive gene action; it ranges depending on the genotype, precocity and environmental conditions; thus, early varieties have higher protein content (35-45%) than the late varieties (30-40%). Early wild varieties are with 5-7% richer in proteins, serving as a source of germplasm for the improvement of protein content. The identification and selection of combinations in transgressive positive segregate generations demonstrated that it is possible to improve this objective. By the artificial induction of mutations have been identified forms high in protein. The objective of this work was the study of the soybean genotypes variability in ARDS Turda germplasm collection regarding the protein content, entirely and grouped according to some morpho-physiological characters. The research has conducted at Agricultural Research and Development Station Turda, in the experimental field of the Leguminous Breeding Laboratory, between the years 2007-2010. It has been studied the soybean germplasm collection from ARDS Turda, that includes 38 lines and native varieties (15.8%) and 202 lines and foreign varieties (84.2%). For the determination of protein and oil content, 50g of grains were weighed for each sample, then were crushed with laboratory mill; the flour resulted was examined using NIR analyzer, Dickey-John brand, INSTALAB 600 type. The statistics index that best characterize the variability of protein content are the arithmetic mean, the standard deviation, the amplitude of variation, the coefficient of variation. The highest protein content registered to the soybean genotypes with shorter vegetation period, with violet flowers and brown pubescence. The genotypes notice for their high protein content and that can be use as sources of germplasm in the breeding processes were disposed between the average protein content and the upper limit of the string variation (42.3% and 47.2%).

soybean genotypes;protein content;the color of flowers; the color of pubescence;the vegetation period; variability; statistical parameters

Presentation: oral