TABLE 4.

Comparative matrix of two indices of linkage disequilibrium for the pSymA replicon of S. meliloti

LocusaLinkage disequilibrium indexb
adeC3fixKnapBnifDnodCSMa0198
adeC30.1060.6930.2350.1300.909
fixK0.8840.1390.2070.1130.086
napB0.1730.6770.216*0.1450.148**
nifD0.786*0.7950.6030.266**0.226
nodC0.793*0.7820.6320.744**0.106
SMa01980.110**0.879**0.680*0.815**0.848**
  • a Sequenced fragments and accession numbers are shown in Table 2.

  • 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 the loci: *, P < 0.05; **, P < 0.01.