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Performance, similarity and genetic parameters of agronomical characters of soybean [Glycine max (L) Merrill.] germplasms

on the coefficient of correlation, grain yield (YLD) was significantly correlated with plant height (HIG), number of reproductive nodes (NOD), number of filled pods (POF) and number of unfilled pods (POU). Broad genetic variability was found for YLD, POU, NOD, POU, number of branches (BRC) and weight of 100 grains (W100). The characters of HIG, NOD and W100 showed high heritability, while YLD showed medium heritability. Based on the heritability, the selection of a genotype with high YLD through only this character is less effective due to the high role of environmental factors. The high-yielding genotypes should be selected using other characters that are related to YLD. The most suitable character for this purpose is NOD because it was significantly correlated with YLD, had broad genetic variability and had high heritability.