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Soybean Genotypic Variation for Nitrogen Fixation
Author(s) -
Reddy G. B.,
Faza Alexandra
Publication year - 1990
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1990.tb00814.x
Subject(s) - nitrogen fixation , cultivar , nitrogenase , biology , bradyrhizobium japonicum , bradyrhizobium , inoculation , horticulture , genotype , botany , agronomy , veterinary medicine , rhizobiaceae , symbiosis , rhizobium , bacteria , gene , medicine , biochemistry , genetics
Eighteen soybean ( Glycine max [L.] Merr) cultivars from maturity groups V and VI were screened with two Bradyrhizobium japonicum strains (USDA 110 and TAL 378) in the greenhouse to determine N 2 fixation (C 2 H 2: reduction) rates. Antibiotic resistant markers were used for observing nodule occupancy. Cultivars L.‐76‐0132, PI 159319, Hoberland, Lee, PI 22173 and Centennial showed high nitrogenase activity of 6.25, 5.54, 17.43, 4.73, 6.94, and 4.81 μM C 2 H 4 /Pl/hr, respectively. Cultivars PI417419, PI 230978, Ogden , and FC 31665 showed low nitrogenase activity of 1.51, 0.80, 0.62 and 0.94 μM C 2 H 4 /Pl/hr, respectively. The data from this screening experiment suggest that the N 2 fixation varied among genotypes and all the nodules were occupied by the inoculated strains only. Rhizobial strain effect was observed among soybean cultivars (MGVI).