Phylogeographic distribution of rhizobia nodulating common bean (Phaseolus vulgaris L.) in Ethiopia

Gunnabo, A H and Geurts, R and Wolde-meskel, E and Degefu, T and Giller, K E and Heerwaarden, J V (2021) Phylogeographic distribution of rhizobia nodulating common bean (Phaseolus vulgaris L.) in Ethiopia. FEMS Microbiology Ecology, 97 (4). pp. 1-16. ISSN 0168-6496

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Abstract

Rhizobia are soilborne bacteria that form symbiotic relations with legumes and fix atmospheric nitrogen. The nitrogen fixation potential depends on several factors such as the type of host and symbionts and on environmental factors that affect the distribution of rhizobia. We isolated bacteria nodulating common bean in Southern Ethiopia to evaluate their genetic diversity and phylogeography at nucleotide, locus (gene/haplotype) and species levels of genetic hierarchy. Phylogenetically, eight rhizobial genospecies (including previous collections) were determined that had less genetic diversity than found among reference strains. The limited genetic diversity of the Ethiopian collections was due to absence of many of the Rhizobium lineages known to nodulate beans. Rhizobium etli and Rhizobiumphaseoli were predominant strains of bean-nodulating rhizobia in Ethiopia. We found no evidence for a phylogeographic pattern in strain distribution. However, joint analysis of the current and previous collections revealed differences between the two collections at nucleotide level of genetic hierarchy. The differences were due to genospecies Rhizobium aethiopicum that was only isolated in the earlier collection.

Item Type:	Article
Divisions:	Research Program : East & Southern Africa
CRP:	UNSPECIFIED
Uncontrolled Keywords:	genetic diversity, genospecies, locus, nucleotides, principal coordinate analysis, rhizobial collections
Subjects:	Others > Genetics and Genomics Others > Ethiopia
Depositing User:	Mr Nagaraju T
Date Deposited:	25 Sep 2024 09:57
Last Modified:	25 Sep 2024 10:00
URI:	http://oar.icrisat.org/id/eprint/12828
Official URL:	https://academic.oup.com/femsec/article/97/4/fiab0...
Projects:	N2Africa: Putting Nitrogen Fixation to Work for Smallholder Farmers in Africa
Funders:	Bill and Melinda Gates Foundation
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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