engleski

Genetic advance in quantitative trits of soybean lines within different maturity groups

The breeding work on soybean at the Agricultural Insitute Osijek has primarily been aimed at continued development of new and better cultivars with higher yield potential in the maturity range of 00 to II. Improving of soybean yield potential is based on the improvement of genetic basis of traits determining its quantity and the application of conventional breeding methods used in self-pollinated crops, such as soybean. The objective of this research was to evaluate genetic advance in quantitative performances - grain yield, protein and oil content in grain as well as oil quality of recently developed soybean elite breeding lines, which was done in comparative field tests with standards through the three-years period (2001-2003) in Osijek, Croatia. Tested elite breeding lines have been developed from differentybridizations within the Institute's soybean breeding program and selected on the basis of their performance. The grain yield and grain quality value of tested genotypes was estimated through analysis of level and stability of grain yield, protein content and oil content in grain. The tested materials which showed high level and good stability in all three investigated traits, were subjected to the analysis of triacylglycerols.Statistical analysis showed that most of the tested elite breeding lines had significantly higher grain yield, protein and oil content in grain relative to the standrads into MGs 00, 0 and I, as well as good stability in analyzed trits. There was a significant genetic variability in triacylglycerols. Generally, these data indicate achieved genetic advance in grain yield and grain quality of domestic soybean lines into MGs 00, 0 and I.

soybean (Glycine max (L.) Merrill); grain yield; protein content; oil content; triacylglycerols; trait stability; RP-HPLC; genetic advance; maturity groups

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