Hungria, M. and Bohrer, T. R. J. (2000) Variability of nodulation and dinitrogen fixation capacity among soybean cultivars. Biology and Fertility of Soils, 31 (1). pp. 45-52.
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Abstract
In order to identify soybean cultivars with higher biological N2 fixation capacities, North American and Brazilian soybean [Glycine max (L.) Merrill] cultivars, belonging to maturity groups VI–VIII, were evaluated for nodulation parameters and N2 fixation rates. The symbiotic performance of 152 cultivars was evaluated in pots containing 4 kg soil with an established population of the three Bradyrhizobium elkanii strains [29w (SEMIA 5019):SEMIA 566 : SEMIA 587, 22%:36%:34%] which are established in most Brazilian soils cultivated with soybean. Differences were verified among cultivars, with some accumulating up to twice as much nodule dry weight and N in tissues as others. The variability among cultivars was also confirmed when six of them were used in a field experiment, resulting in differences in nodulation, yield and total N accumulated in grains. The analysis of nodule occupancy in 12 cultivars grown either under sterile conditions and receiving a double inoculum and N-free nutrient solution, or in pots containing soil with an established population of bradyrhizobia, showed the preference of cultivars for specific strains.
| Item Type: | Article |
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| Additional Information: | We are grateful to Dr.Leones A.de Almeida and Dr.Romeu A.de S.Kihl, for their helpful cooperation during the experiments, and to Lígia Maria de O.Chueire and Rinaldo B.Conceição, for technical support. We thank CAPES, for an M.Sc. fellowship awarded to T.R.J. Bohrer and to CNPq, for a research fellowship (520396/96-0) awarded to M. Hungria. This work was financed by EMBRAPA and FINEP/CNPq/MCT, Group of Excellence on Nitrogen Fixation, project 41-96-0884-00. |
| Uncontrolled Keywords: | Key words Bradyrhizobium, Glycine max, Nodulation, Symbiosis Plant breeding |
| Author Affiliation: | Embrapa-Soja, Londrina, PR, Brazil |
| Subjects: | Plant Protection Crop Improvement |
| Divisions: | Soyabean |
| Depositing User: | Mr Arbind Seth |
| Date Deposited: | 04 Aug 2013 12:47 |
| Last Modified: | 04 Aug 2013 12:47 |
| Official URL: | http://dx.doi.org/10.1007/s003740050622 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11323 |
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