Table 3

Haplotype richness, sequence diversity and neutrality estimates for populations of Erysiphe necator.

Locus

Population¹

Haplotype richness (h_R)²

Watterson's θ (θ_w)

π

Tajima's D (P-value)

ITS/IGS

Eastern US

6 (9)³

0.00123

0.00085

-1.167 (0.108)

Introduced

3

0.00123

0.00217

1.901 (0.975)

P = 0.013

P = 0.485

P = 1.000

TUB2

Eastern US

7 (11)

0.00314

0.00159

-1.598 (0.013)

Introduced

4

0.00157

0.00192

0.478 (0.727)

P = 0.049

P = 0.050

P = 0.833

EF1-α

Eastern US

11 (15)

0.00601

0.00472

-0.680 (0.270)

Introduced

4

0.00164

0.00142

-0.281 (0.411)

P < 0.001

P = 0.001

P = 0.001

Combined

Eastern US

21 (40)

0.00282

0.00194

-

Introduced

6

0.00141

0.00193

-

P < 0.001

P = 0.001

P = 0.497

¹The introduced population comprises Europe, Australia and the western US; the eastern US comprises northeast, southeast and central US (Table 1).

²To account for sample size differences in eastern US (N = 103) and introduced populations (N = 43), we used rarefaction analysis [66] for haplotype richness, θ_w, and π in the native population. Diversity estimates where the eastern US population is significantly more diverse than the introduced populations (P < 0.05) are in bold.

³Numbers in parentheses are the number of observed haplotypes among the 103 isolates from the eastern US population without correction by rarefaction analysis.

Brewer and Milgroom BMC Evolutionary Biology 2010 10:268   doi:10.1186/1471-2148-10-268