TABLE 3.

Comparative matrix of two indices of linkage disequilibrium for the pSymB replicon of Medicago-nodulating rhizobia

LocusaLinkage disequilibrium indexb
catcCdakdgoAgabTidhpdh
catC0.1590.0410.0530.0180.091*
dak0.6700.0730.1820.1090.757
dgoA0.8020.6720.0410.0280.050*
gabT0.6710.6730.8080.0180.093
idh0.8610.8060.8340.8710.048
pdh0.8080.1220.7660.8180.887
  • a Sequenced fragments and accession numbers are shown in Table 1.

  • b The numbers above the diagonal are the standardized index of association statistics (Rd) for each combination. The numbers below the diagonal are the proportion of phylogenetically compatible polymorphic nucleotide sites (PrC) for each combination. Asterisks refer to the rejection of the hypothesis of random recombination (i.e., linkage equilibrium) between loci: *, P < 0.05; **, P < 0.01.