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Table 1 Best-fitting models of dN/dS (ω) across 2091 loci analyzed. For each model, the absolute number (and proportion) of loci for which that model best explained the data (according to AIC) is provideda

From: Transcriptome sequencing reveals genome-wide variation in molecular evolutionary rate among ferns

Model # Loci Positive selection
ω > 1
Neutral
ω = 1
Purifying selection
ω < 1
ωT = ωV = ωB 888 (42.4 %) 1 (0.11 %) 0 887 (99.9 %)
ωT = ωB ≠ ωV 467 (22.3 %)    
ωT = ωB   0 0 467 (100 %)
ωV   3 (0.64 %) 49 (10.5 %) 415 (88.9 %)
ωT ≠ ωV = ωB 318 (15.2 %)    
ωT   0 0 318 (100 %)
ωV = ωB   0 2 (0.62 %) 316 (99.4 %)
ωT = ωV ≠ ωB 294 (14.0 %)    
ωT = ωV   0 0 294 (100 %)
ωB   1 (0.34 %) 2 (0.68 %) 291 (98.9 %)
ωT ≠ ωV ≠ ωB 124 (5.9 %)    
ωT   0 0 124 (100 %)
ωV   0 8 (6.45 %) 116 (93.5 %)
ωB   1 (0.81 %) 1 (0.81 %) 122 (98.4 %)
  1. aωT = estimated average dN/dS across all sampled taxa with the exclusion of vittarioid ferns and their subtending branch; ωV = estimated average dN/dS for vittarioid ferns; ωB = estimated dN/dS for branch subtending vittarioid ferns (see Fig. 3)