Table 4

Effects of environmental variables on genetic differentiation of G. elliotii populations based on mtDNA and microsatellite data analyses

Variable set

Marginal tests P

%var

Sequential tests P

%var


Tests for microsatellite loci and Nei's standard genetic distance

Vegetation

0.03

66.28

0.03

66.28

Coordinate

0.001

56.66

0.355

73.62

Subregion

0.002

56.35

0.652

77.11

Elevation

0.292

13.79

Temperature

0.444

10.39

Rainfall

0.21

16.62

Tests for microsatellite loci and genetic distances measured as pairwise FST

Coordinate

0.01

81.36

0.006

81.36

Subregion

0.005

66.2

0.075

96.66

Vegetation

0.085

70.4

0.09

96.88

Elevation

0.21

18.27

Temperature

0.11

57.4

Rainfall

0.1

28.4

Tests for mtDNA and genetic distance measured as pairwise ΦST

Vegetation

0.025

77.86

0.025

77.86

Coordinate

0.028

71.61

0.020

95.05

Temperature

0.075

69.26

0.727

97.77

Subregion

0.071

46.94

Elevation

0.160

30.84

Rainfall

0.031

55.97

Tests for mtDNA and genetic distance measured as uncorrected pairwise distance

Vegetation

0.025

57.44

0.025

57.44

Temperature

0.706

31.52

0.547

73.57

Coordinate

0.588

22.39

0.532

81

Subregion

0.386

23.42

Elevation

0.688

11.24

Rainfall

0.450

11.64


Marginal tests of individual variable sets as well as sequential tests of the forward selection procedure are reported. P indicates probability values and '%var' shows the percentage of the genetic variation explained by the particular variable. In the case of sequential tests, '%var' indicates the percentage of the genetic variation explained by the cumulative effect of variables. The top-down sequence of variables corresponds to the sequence that was indicated by the forward selection procedure.

Qu et al. BMC Evolutionary Biology 2011 11:174   doi:10.1186/1471-2148-11-174

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