Gene Flow Migration Rate Calculator

Calculate migration rates, gene flow, and genetic connectivity between populations.

Population Parameters

Population 1 Size

Population 2 Size

Allele Freq Pop 1 (p1)

Allele Freq Pop 2 (p2)

Observed Fst

For estimating Nm from genetic differentiation

Migrants per Generation

Generations to Simulate

Wright's Formula: Fst = 1 / (1 + 4Nm)

Rule of One: Nm > 1 prevents drift-based divergence

Genetic Connectivity

High Connectivity

Migrants/Gen (Nm)

Yes

Overcomes Drift

Migration Rates

m (Pop 2 to Pop 1)

Proportion immigrating

0.010000

m (Pop 1 to Pop 2)

Proportion immigrating

0.020000

Effective m

Average migration rate

0.015000

Nm Estimates

Direct (from migrants)10

From Fst (indirect)4.75

From Freq Diff (indirect)1.25

Equilibrium Fst0.0244

Differentiation Metrics

Initial Freq Difference20.00%

Final Freq Difference4.3613%

Convergence78.2%

Time to Homogenize46.2 gen

Gst (relative diff)0.0357

Frequency Convergence

Gen 0p1=0.6000, p2=0.4000

Gen 5p1=0.5906, p2=0.4188

Gen 10p1=0.5825, p2=0.4350

Gen 15p1=0.5756, p2=0.4489

Gen 20p1=0.5696, p2=0.4608

Gen 25p1=0.5645, p2=0.4711

Gen 30p1=0.5601, p2=0.4799

Gen 35p1=0.5563, p2=0.4874

Gen 40p1=0.5530, p2=0.4939

Gen 45p1=0.5503, p2=0.4995

Gen 50p1=0.5479, p2=0.5043