Phaseolus vulgaris is nodulated in northern Spain by Rhizobium leguminosarum strains harboring two nodc alleles present in American Rhizobium etli strains: Biogeographical and evolutionary implications

1. García-Fraile, P.
2. Mulas-García, D.
3. Peix, A.
4. Rivas, R.
5. González-Andrés, F.
6. Velázquez, E.