Table 2 Fixation indices and percentage of variation explained by each source for groups of populations identified by SAMOVA within each clade (all results are significant at P < 0.05 and shown in boldface).F_SC, variance among subpopulations within groups; F_ST, variance among subpopulations relative to the total variance; F_CT, variance among groups relative to the total variance

2

(MEX1, MEX2, MEX3) - (SAL1, SAL2, SAL3, PER1, PER2)

0.010

0.526

0.522

52.190

0.460

47.350

3

(MEX1, MEX2) - (MEX3) - (SAL1, SAL2, SAL3, PER1, PER2)

0.009

0.495

0.491

49.070

0.470

50.450

4

(MEX1) - (MEX2) - (MEX3) - (SAL1, SAL2, SAL3, PER1, PER2)

0.013

0.481

0.475

47.450

0.690

51.860

5

(MEX1) - (MEX2) - (MEX3) - (SAL2) - (SAL1, SAL3, PER1, PER2)

0.002

0.447

0.446

44.580

0.120

55.300

6

(MEX1) - (MEX2) - (MEX3) - (SAL2) - (PER1) - (SAL1, PER1, PER2)

-0.001

0.414

0.414

41.450

-0.040

58.590

7

(MEX1, MEX2) - (MEX3) - (SAL1) - (SAL2) - (SAL3) - (PER1) - (PER2)

-0.007

0.384

0.388

38.790

-0.400

61.610