Neutral parameters estimation.

The table depicts parameters and statistics estimated for a selection of chromosomes of different species. Chromosomes are arranged according to p-value from the less to the most neutral. J is the total number of genetic elements; S is the number of genetic species; ΔH is the difference between the observed and the expected evenness (Shannon's diversity index); θ is the fundamental diversity number; m is the migration rate; P and Q-val are statistical significances of the neutral test before and after false-discovery rate correction. The last column shows the model (Ewens or Etienne) that best fitted the empirical distribution of genetic elements in the chromosome after likelihood-ratio test (p<0.05, df = 1). After multiple-testing correction (FDR<0.05), none of the 548 chromosomes of the 31 eukaryotic genomes showed significant deviations from neutrality.