A comparison of three Rhizobium linkage maps

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  • A Kondorosi, Denmark
  • Éva Vincze
  • A W B Johnston, Denmark
  • J E Beringer, Denmark
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.
Original languageEnglish
JournalMolecular and General Genetics
Volume178
Pages (from-to)403-408
Number of pages6
DOIs
Publication statusPublished - 1980
Externally publishedYes

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