Estimates of genetic polymorphism revealed by seven minisatellites and mating type ratios in <i>AvrLm7</i> or <i>avrLm7</i> populations of <i>Leptosphaeria maculans</i> collected from the Grignon field experiment between autumn 2006 and 2008.

aN, number of isolates; Na and Na Freq. ≥5%, mean number of different alleles and mean number of different alleles with frequency >0.05, respectively (± standard error); H, unbiased gene diversity averaged across loci (± standard error); MLG, number of multilocus genotypes; NMLG, mean number of isolates per genotype (± standard error); rd, standardized version of the index of association as calculated in Multilocus v3.1; Mat1-1/Mat1-2 is the ratio of the number of isolates carrying mating type 1 (Mat1-1) to isolates carrying mating type 2 (Mat1-2). (*) Significant deviation from a 1∶1 ratio was tested using a χ2 with 1 degree of freedom; ns, P>0.05; *, P<0.05.