engleski

Biometrical Analysis for Grain Yield of Soybean Genotypes I Maturity Group of the Osijek Agricultural Institute - Croatia

The soybean Glycine max (L) Merrill is relatively new crop in Croatia (28 years are growing in continuity). The main growing area is in the eastern part of country where are the best agroecological conditions for this kind of production. The research work on the soybean includes the breeding as well as the developing in that area at the Osijek Agricultural Institute. A full scale of soybean hybridisation programme was initiated at the Osijek Agricultural Institute in 1970 so far. Twenty-four soybeans recognised cultivars have been developed by hybridisation of selected parents. Soybean's breeding programme developed in Institute has enormous influence on the soybean production development and stability in the whole country, notably in the East Croatia. The main objective in the breeding of soybean is the permanent of higher yielding cultivars (above 5 t/ha) in the frame of 00 to II maturity groups (0 and I maturity groups in focus). Besides, the high genetic yield potential of the new cultivars ought to have other agronomic traits satisfactory. The present work is organised only according to the conventional classic work methods and outlines valid for self-pollinated crops, such as soybean crop. The new biotechnological methods as the auxiliary methods to the classic are not introduced yet. In this paper, it will be given a part of results of our work on the soybean breeding (1993-1997) for yield into genotypes of I maturity group with emphasis on heritability, genetic gain and grain yield stability.The results obtained should give the information about soybean genetic improvement for grain yield in soybean breeding program at the Osijek Agricultural Institute.

soybean; cultivar; grain yield; heritability; genetic gain; parameters of stability

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