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Table 1 Tests of asymmetrical rate evolution in mt vs. nuclear genes in three hybrid crosses

From: The origin of the parrotfish species Scarus compressus in the Tropical Eastern Pacific: region-wide hybridization between ancient species pairs

Species pair

mt haplogroup (%)

 

\({\delta }_{i}\)

 

a

b

A

B

C

Predicted asym

a

b

Species > mt evolution

S. ghobban (C)

S. rubroviolaceus (B)

0.00

84.6

15.4

a > b

0.109

− 0.109

S. ghobban

S. perrico (A)

S. ghobban (C)

0.00

7.1

92.9

a >> b

− 0.065

0.065

S. ghobban

S. perrico (A)

S. rubroviolaceus (B)

3.4

93.1

3.4

a >> b

0.051

− 0.051

S. perrico

  1. Shaded columns indicate asymmetry that is consistent with mitonuclear DMIs
  2. Species-specific mt haplogroups are given in parenthesis after each species in the species pair column and correspond to Fig. 2a. The “Predicted asym.” column gives the predicted direction of asymmetry between species given the frequency of mt haplogroups in hybrids (“mt haplogroup” column). The asymmetry parameter \({\delta }_{i}\) is calculated from estimates of mitochondrial and nuclear branch lengths on a phylogenetic hypothesis (Additional file 1: Figure S4). See methods for more details