qtl (version 1.13-7)

locateXO: Estimate locations of crossovers

Description

Estimate the locations of crossovers for each individual on a given chromosome.

Usage

locateXO(cross, chr)

Arguments

cross

An object of class cross. See read.cross for details.

chr

Chromosome to investigate (if unspecified, the first chromosome is considered). This should be a character string referring to a chromosome by name; numeric values are converted to strings.

Value

• A list with one component per individual. Each component is either NULL or is a numeric vector with the estimated crossover locations.

Details

For each individual we detemine the locations of obligate crossovers, and estimate their location to be at the midpoint between the nearest flanking typed markers.

The function currently only works for a backcross, intercross, or recombinant inbred line.

See Also

countXO

Examples

data(hyper)
xoloc <- locateXO(hyper, chr=4)
table(sapply(xoloc, length))