Table 4 Results of the bottleneck analysis.

From: Fine-scale genetic structure in the critically endangered red-fronted macaw in the absence of geographic and ecological barriers

Bottleneck

Mode-shift

M-ratio (Mc)

Genetic cluster

TPM

P-values

SMM

P-values

IAM

P-values

M

θ = 0.1

θ = 1

θ = 10

W1

0.180

0.180

0.410

Normal L-shaped

0.421

0.763

0.693

0.590

W2

0.545

0.633

0.082

Normal L-shaped

0.528

0.767

0.695

0.575

W3

0.936

0.986*

0.009

Normal L-shaped

0.265

0.767

0.706

0.669

W4

0.248

0.500

0.005

Normal L-shaped

0.272

0.761

0.698

0.605

  1. P-values of the one-tail Wilcoxon test for heterozygote excess are shown for the Two-Phase Model (TPM), Stepwise Mutation Model (SMM) and Infinite Allele Model (IAM). For the Mode-shift test, modes obtained for each population are indicated. Values of the observed M-ratio (M) and critical ratio (Mc) were estimated for three values of pre-bottleneck θ that correspond to Ne values of 50, 500 and 5000, respectively. Values in bold suggest historic bottleneck events.
  2. *Significant p-values were obtained for heterozygote deficiency (p < 0.05).
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