Summary
Linkage maps of R. meliloti 2011 (Rm2011), R. meliloti 41 (Rm41) and R. leguminosarum 300 (R1300), all constructed by means of P1 plasmid-mediated recombination, were compared. Recombination between the two R. meliloti strains occurred at high frequency but was barely detectable in matings between R1300 and Rm41. When co-inheritance data for the three strains were transformed into additive map distances the arrangement of markers showed striking similarities. Each of eight R68.45-primes, carrying different sections of the Rm2011 chromosome, suppressed only those markers of both R1300 and Rm41 which had the same phenotype and map location. Each of these R-primes promoted polarized chromosome transfer in an anticlockwise direction in Rm41, starting from the region corresponding to that carried on the plasmid.
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Kondorosi, A., Vincze, E., Johnston, A.W.B. et al. A comparison of three Rhizobium linkage maps. Molec. Gen. Genet. 178, 403–408 (1980). https://doi.org/10.1007/BF00270491
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DOI: https://doi.org/10.1007/BF00270491