Research Article

Effects of Taxon Sampling in Reconstructions of Intron Evolution

Table 1

Partial correlations of the sampling size, number of descendants, outgroups, and presence/absence of key species with intron densities in ancestral nodes. Italics are correlations significant at P level > 0.05. In bold are highest correlations for the node.

NYKSamplingDescendantsOutgroup-partial1st descendant2nd descendant
BetaP levelBetaP levelBetaP levelBetaP levelNameBetaP levelName

Fungi−0.24 0.00 −0.09 0.02 −0.010.72−0.270.00Allomyces−0.18 0.00 Encephalitozoon
Bilateria0.16 0.00 0.050.21−0.040.26−0.250.00Trichinella0.22 0.00 Daphnia
Spiralia0.14 0.01 0.30 0.00 −0.080.050.680.00Lottia0.30 0.00 Helobdella
Nematoda0.20 0.00 0.21 0.00 −0.080.05−0.290.00Caenorhabditis0.25 0.00 Brugia
Insecta0.33 0.00 0.35 0.00 −0.080.050.660.00Rhodnius0.24 0.00 Drosophila
Ascomycota−0.090.070.070.09−0.09 0.03 −0.130.01Schizosacch0.10 0.03 Magnaporthe
Basidiomycota−0.310.00−0.13 0.00 −0.09 0.02 −0.22 0.00 Cryptococcus −0.15 0.00 Ustilago
Viridiplantae−0.060.240.040.29−0.09 0.03 −0.240.00Ostreococcus−0.170.00 Oryza
Alveolata−0.090.090.13 0.00 −0.15 0.00 0.450.00Paramecium−0.230.00 Tetrahymena
Apicomplexa−0.19 0.00 0.10 0.02 −0.17 0.00 0.350.00Eimeria−0.240.00 Cryptosporidium
Sporozoa−0.12 0.02 0.020.60−0.070.080.300.00Eimeria−0.300.00Cryptosporidium

CsurosSamplingDescendants-partialOutgroup1st descendant2nd descendant
BetaP levelBetaP levelBetaP levelBetaP levelNameBetaP levelName

Fungi−0.34 0.00 −0.24 0.00 0.020.63−0.530.00Batrachochytrium−0.48 0.00 Allomyces
Bilateria−0.050.30−0.090.090.020.65−0.150.00Nematostella−0.13 0.00 Branchiostoma
Spiralia0.13 0.01 0.36 0.00 −0.10 0.01 0.710.00Lottia0.48 0.00 Helobdella
Nematoda0.26 0.00 0.360.00−0.060.190.39 0.00 Brugia 0.34 0.00 Trichinella
Insecta0.34 0.00 0.36 0.00 −0.08 0.04 0.640.00Rhodnius0.30 0.00 Drosophila
Ascomycota0.610.000.54 0.00 0.23 0.00 0.46 0.00 Saccharomyces 0.41 0.00 Schizosaccharomyces
Basidiomycota0.090.060.070.090.070.08−0.320.00Phakopsora0.19 0.00 Cryptococcus
Viridiplantae−0.030.510.000.920.060.17−0.230.00Chlorella0.12 0.00 Ostreococcus
Alveolata0.710.000.52 0.00 0.18 0.00 0.61 0.00 Tetrahymena 0.35 0.00 Paramecium
Apicomplexa0.20 0.00 0.12 0.00 0.09 0.02 −0.260.00Perkinsus0.14 0.00 Cryptosporidium
Sporozoa0.45 0.00 0.47 0.00 0.000.920.490.00Cryptosporidium0.28 0.00 Toxoplasma