Sjemenarstvo, Vol. 21 No. 3-4, 2004.
Original scientific paper
GENETIC ADVANCE IN YIELD COMPONENTS, GRAIN YIELD AND GRAIN QUALITY OF SOYBEAN OS-LINES
Aleksandra Sudarić
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Marija Vratarić
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Rezica Sudar
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Tomislav Duvnjak
; Poljoprivredni institut Osijek, Osijek, Hrvatska
Abstract
Genetic improvement of soybean cultivars has had significant role in yield increasing as well as in development, improvement and stabilization of soybean production, respectively. The aim of this study was to evaluate genetic advance in yield components, grain yield and grain quality of soybean throughout analysis of agronomic values of new domestic elite breeding soybean lines in comparison with commercial cultivars. The reliability of the grain quantity traits as selection criteria in soybean breeding on grain yield were determined, too. The investigations were carried out at the Agricultural lnstitute Osijek from 2001 to 2003 and involved 31 domestic soybean genotypes ranging maturity groups l. Mean values, broad-sense heritability, genetic gain and relative genetic gain from selection were calculated for grain yield components, grain yield, protein and oil content in grain. The obtained results of quantitative genetic analysis indicated progress through breeding in grain quantity and quality traits that will contribute to further improving and increasing of soybean production in our region. Likewise, recent breeding materials represent good genetic basis for future hybridizations aimed at advancing of quantity and quality of grain yield in soybean genetically. Regarding to traits reliability as selection criteria, grain yield components are determined as more reliable criteria for selection of superior genotypes than grain yield per se due to higher heritability (61.87-82.31%) and better progress in selection (10.63-22.78%). Grain quality traits had medium heritability (60.04-65.89%) and better progress in selection (6.95-8.94%) compared to grain yield that had fess heritability (29.87%) and relative genetic gain from selection was 0.43%.
Keywords
soybean (Glycine max (L.) Merrill); grain yield; grain quality; yield components; genetic advance; heritability; genetic gain from selection; relative genetic gain
Hrčak ID:
168009
URI
Publication date:
26.5.2004.
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