Table 1

Results of canonical phylogenetic ordination of AFLP data

Variation explained¶


Node ¥

Marginal effects† λ1

Conditional effects‡ λa

P-Value#


Phylogenetic groups according to mtDNA-based phylogeny

S. galilaeus sensu lato incl. Barombi taxa *

1

0.15

0.10

0.000

S. galilaeus sensu lato w/o S. g. sanagaensis incl. Barombi taxa

2

0.12

0.05

n.s.

S. galilaeus w/o S. g. sanagaensis excluding Barombi taxa

3

0.15

-

n.s.

S. g. multifasciatus *

4

0.18

0.13

0.000

S. galilaeus w/o S. g. sanagaensis and S. g. multifasciatus

5

0.12

-

n.s.

S. galilaeus "Meme" *

6

0.10

0.08

0.000

"Cross-clade" + S. g. "Niger"

7

0.10

-

n.s.

"Cross-clade" *

8

0.09

0.07

0.001

"Barombi Mbo clade" *

9

0.18

0.11

0.000

Stomatepia ssp.*

10

0.08

0.06

0.000

St. mongo *

11

0.07

0.05

0.054

St. mariae *

12

0.06

0.05

0.008

St. pindu *

13

0.05

-

n.s.

St. mariae St. pindu

14

0.06

-

n.s.

Pungu maclareni Konia ssp.

15

0.07

0.05

0.025

Konia ssp. *

16

0.06

0.06

0.001

Pungu maclareni *

17

0.06

-

n.s.

Konia eisentrauti *

18

0.05

0.04

n.s.

Konia dikume *

19

0.05

-

n.s.

Myaka myaka *

20

0.05

0.04

n.s.

Sarotherodon lohbergeri *

21

0.06

0.04

n.s.

Sarotherodon steinbachi *

22

0.05

-

n.s.

"Barombi Sarotherodon clade"

23

0.08

-

n.s.

Phylogenetic groups according to AFLP-phylogeny

Myaka + S. caroli/S.linnellii

27

0.07

-

n.s.

Pungu + S. lohbergeri/S. steinbachi

28

0.07

-

n.s.

St. mongo + St. pindu

29

0.07

-

n.s.

S. galilaeus s. l. incl. Barombi taxa w/o S.g.multifasciatus and S.g. "Niger"

30

0.21

0.21

0.000

S. lohbergeri + S. steinbachi

31

0.06

-

n.s.

S. linnellii + S. caroli

32

0.06

-

n.s.

S. sp. "mudfeeder" + S. sp. "bighead"

33

0.08

0.05

0.013

Hypothetical ancient syngameons according to conflict between mtDNA-based and AFLP-based phylogenetic hypotheses

groups ¥¥

P. maclareni + Konia ssp. + S. lohbergeri + S. steinbachi

red (24)

0.08

0.06

0.002

M. myaka + S. caroli + S. linnellii + S. lohbergeri + S. steinbachi

green (25)

0.09

-

n.s.

S. g. sanagaensis + S. galilaeus w/o S. g. multifasciatus. S. g. "Niger"

blue (26)

0.15

-

n.s.


Each phylogenetic group as identified by nodes in phylogenetic analyses of mtDNA-, or AFLP-data or by the conflict between the data sets (hypothetical syngameons) was tested for their explanatory value in explaining variance in the AFLP data set.

¥ Node numbers correspond to encircled node numbers for mtDNA-clades and AFLP-clades supported in Fig. 1.

¥¥ Groups refer to hypothetical syngameons as indicated by coloured blocks in Fig. 1a and b.

¶ "Variation explained" refers to eigenvalues of each phylogenetic group that explain part of the variation in the pruned AFLP-data (2355 loci / 33 samples identical to those in Fig. 1a. Sum of all unconstrained eigenvalues was 1.667, sum of all canonical eigenvalues 1.179.

† Marginal effects refer to eigenvalues ("fit") of each phylogenetic group if taken singly as the only variable on the pruned AFLP data set.

‡ Conditional effects refer to the increase in eigenvalues ("additional fit") of each phylogenetic group as selected by automatic forward selection.

# P-values refer to the significance level of the conditional effects as obtained with a Monte Carlo permutation test under the full model with 9999 random permutations.

* mtDNA-clades as indicated in Fig. 1b that are compatible with clades as identified by the AFLP phylogenetic tree in Fig. 1a.

Schliewen and Klee Frontiers in Zoology 2004 1:5   doi:10.1186/1742-9994-1-5

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