inverse_haldane_mapping: Inverse Haldane Mapping Function

In selection.index: Analysis of Selection Index in Plant Breeding

Inverse Haldane Mapping Function

Description

Converts recombination fraction back to genetic distance (in Morgans). This is the inverse of Haldane's mapping function.

Usage

inverse_haldane_mapping(recombination_fraction)

Arguments

recombination_fraction

Recombination fraction (r) between 0 and 0.5.

Details

Mathematical Formula:

Solving Haldane's equation for d:

d = -\frac{1}{2} \ln(1 - 2r)

Value

Genetic distance in Morgans.

Examples

# Convert recombination fraction to distance
inverse_haldane_mapping(0.25) # Returns ~0.347 Morgans
inverse_haldane_mapping(0.5) # Returns Inf (unlinked)

selection.index documentation built on March 9, 2026, 1:06 a.m.