beta_bounds: Bounds on the distortion at simplex loci caused by double...

In segtest: Tests for Segregation Distortion in Polyploids

Bounds on the distortion at simplex loci caused by double reduction.

Description

The frequency of (nullplex, simplex, duplex) gametes is (.5 + beta, .5 - 2 * beta, beta). This function returns the upper bound on beta under two models.

Usage

beta_bounds(ploidy, model = c("ces", "prcs"))

Arguments

ploidy	The ploidy
model	Either complete equational segregation ("ces") (Mather, 1935) or pure random chromatid segregation "prcs") (Haldane, 1930). See also Huang et al. (2019).

Details

Returns the upper bound on the probability of a gamete with a genotype of 2 when the parent has a genotype of 1. This is based on two models. The upper bound from complete equational separation is higher than the upper bound from the pure random chromatid segregation. See Huang et al (2019) for a description of these models.

Value

The upper bound on beta.

Author(s)

David Gerard

References

• Huang, K., Wang, T., Dunn, D. W., Zhang, P., Cao, X., Liu, R., & Li, B. (2019). Genotypic frequencies at equilibrium for polysomic inheritance under double-reduction. G3: Genes, Genomes, Genetics, 9(5), 1693-1706. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1534/g3.119.400132")}

Examples

beta_bounds(4)
beta_bounds(6)
beta_bounds(8)
beta_bounds(10)

segtest documentation built on July 1, 2025, 1:07 a.m.