All possible direct comparisons of map length between paired control and coevolved lines. The graph covers thirteen corresponding (paired) intervals (x-axis). To account for zero values, one observation was added to all recombinant counts and to all total counts; hence, recombination frequency is calculated as: nrecombinants + 1/ntotal + 1. Recombination frequencies were transformed into map distances. Shown is the significant logarithmic relationship between the relative difference in percentages of coevolved (NL) and control lines (CL), and the observed map lengths in the control lines (linear regression, n = 13, F1, 11 = 10.188, P = 0.009, R2 = 0.481). This indicates that observed recombination frequencies are higher in coevolved lines compared to control lines. Symbols indicate from which line each data point originates: a triangle for line 3, a square for line 4, a circle for line 5, a diamond for line 6.
Kerstes et al. BMC Evolutionary Biology 2012 12:18 doi:10.1186/1471-2148-12-18