Symbiotic effectiveness of Zambian Bradyrhizobium spp. with U.S. soya bean cultivars

C.B. Brooks, R.B. Dadson, B.M. Green


Invasiveness and efficiency of six Zambian strains of Bradyrhizobium spp., with five U.S.-bred soya bean varieties were tested. Host genotype was the major determinant in symbiotic compatibility since differences in relative nodulating abilities of strains with genotypes were apparent. Contrary to the theory that African cowpea bradyrhizobia cannot efficiently nodulate soya bean, evidence was provided to indicate that some strains can be both effective and efficient nodulators of U.S. cultivars


Bradyrhizobium; Glycine max; Inoculant; Nodulation

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