GENOTIPE X ENVIRONMENT INTERACTION BETWEEN YIELD AND QUALITY COMPONENTS OF SOYBEAN [GLYCINE MAX]

The interaction of genotype x environment on yield and protein and oil content at five NS varieties of soybean was researched in this paper. All studied characteristics significantly varied in dependence of variety and the year. The highest grains yield per area unit had, on an average, Tea and Victoria varieties (4 639 kg ha^-1, 4521 kg ha^-1). During 2010, statistically significantly higher grain yield per area unit as well as protein and oil yield was achieved, compared with 2009. The highest grain yield per area unit in 2010 had Tea and Balkan varieties (5.296 kg ha^-1, 5.237 kg ha^-1). Tea variety performed, on an average, the highest content of protein and oil. During 2009, statistically significantly higher oil content was achieved than in the 2010, while during the 2010 statistically significantly higher protein content was achieved. The highest protein content had Tea, Sava and Victoria varieties, while the highest oil content had Tea, Zvezda and Sava varieties. The highest protein and oil yield had Tea variety. These studies represent the basis for further soybean breeding.