Breeding soybeans for the tropics capable of nodulating effectively with indigenousRhizobium spp.
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Most soybean varieties fail to nodulate effectively in tropical soils unless inoculated with a competitive strain ofRhizobium japonicum. Developing countries in the tropics, with few exceptions, lack inoculant industries to produce and distribute viable inoculants to small farmers and extension programs to teach them to use inoculant. Several soybean genotypes have been identified that nodulate effectively with many strains of the “cowpea” inoculation group which is ubiquitous in tropical soils of Africa. Soybean genotypes that nodulate and grow well without inoculant application are called “promiscuous”. Methodologies for incorporation of the promiscuity character into high-yielding backgrounds are discussed.
Key wordsBreeding Glycine max Nodulation Rhizobium spp. Soybean
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- 1.Ahmed M H, Eaglesham A R J, Hassovna S, Seaman B, Ayanaba A, Mulongoy K and Pulver E L 1981 Examining the potential for inoculant use with cowpeas in West African soils. Trop. Agric. 58, 325–335.Google Scholar
- 2.Alexander M 1982 Research to enhance nitrogen fixation: Misplaced emphasis?In Priorities in Biotechnology Research for International Development. National Academic Press, pp. 208–229.Google Scholar
- 3.Auckland A K 1966 Soybeans in Tanzania I. The exploitation of hybridization for the improvement of soybeans. J. Agric. Sci. Camb. 69, 455–464.Google Scholar
- 4.Chowdhury M S 1975 Response of soybean toRhizobium inoculation at Morogoro, Tanzania.In Biological Nitrogen Fixation in Farming Systems of the Tropics. Eds. A. Ayanaba and P J Dart. John Wiley and Sons, Chichester, England. pp 245–253.Google Scholar
- 5.Chowdhury M S and Doto A L 1981 Biological nitrogen fixation as a criterion for soybean breeding: Preliminary results.In Biological Nitrogen Fixation Technology for Tropical Agriculture. Eds. P H Graham and S C Harris. CIAT Series No. 03E-5 (82), Cali, Columbia, pp 45–48.Google Scholar
- 6.International Institute of Tropical Agriculture 1980 Annual Report 1979. Ibadan, Nigeria.Google Scholar
- 7.International Institute of Tropical Agriculture 1982 Annual Report 1981. Ibadan, Nigeria.Google Scholar
- 8.International Institute of Tropical Agriculture 1983 Annual Report 1982. Ibadan, Nigeria.Google Scholar
- 9.International Institute of Tropical Agriculture 1984 Annual Report 1983. Ibadan, Nigeria.Google Scholar
- 10.Norris D O and Date R A 1976 Legume bacteriology.In Tropical Pastures Research. Eds. N H Shaw and W W Brian. CAB Bulletin 51, Alden Press, Oxford, England. pp 134–174.Google Scholar
- 11.Pulver E L, Brockman F and Wein C 1982 Nodulation of soybean cultivars withRhizobium spp. and their response to inoculation withR. japonicum. Crop. Sci. 22, 1065–1070.Google Scholar
- 12.Pulver E L, Kueneman E A and Rao V R 1984 Identification of promiscuous nodulating soybeans efficient in N2 fixation.In preparation.Google Scholar
- 13.Rao V R, Ayanaba A, Eaglesham A J R and Kueneman E A 1981 Exploiting symbiotic nitrogen fixation for increasing soybean yields in Africa.In GIAM VI Global Impacts of Applied Microbiology. Eds. S O Emejuaiwe, O Ogunbi and S O Sanni. Academic Press, London, pp 153–167.Google Scholar
- 14.Rao V R, Thottapilly G and Ayanaba A 1982 Studies on the persistance of introduced strains ofRhizobium japonicum in soil during fallow and the effect on soybean growth and yield.In Biological Nitrogen Fixation Technology for Tropical Agriculture. Eds. P H Graham and S C Harris. CIAT Series No. 03E-5 (82), Cali, Columbia, pp 309–315.Google Scholar