### Abstract

The expected disequilibrium between two loci with k alleles at one locus and l alleles at the other is given for a sample of size n drawn from a population under neutrality equilibrium. Three different measures of disequilibrium with 95% intervals are tabulated for combinations of n, k, l and 4Nc, where N is the effective population size and c is the amount of recombination between the loci. The extent and pattern of disequilibrium are strongly dependent upon 4Nc and are somewhat dependent on n, k and l. The 95% intervals are large, particularly for low numbers of alleles and low values of 4Nc. As examples, observed disequilibrium from histocompatibility loci in humans (HLA) and electrophoretic data in E. coli and lodgepole pine were compared to these theoretical values. Using information about recombination rates, the HLA data showed more disequilibrium than neutrality expectations, whereas electrophoretic data from E. coli and lodgepole pine had somewhat less disequilibrium than neutrality expectations.

Original language | English (US) |
---|---|

Pages (from-to) | 135-156 |

Number of pages | 22 |

Journal | Genetics |

Volume | 112 |

Issue number | 1 |

State | Published - 1986 |

Externally published | Yes |

### Fingerprint

### ASJC Scopus subject areas

- Genetics
- Genetics(clinical)

### Cite this

*Genetics*,

*112*(1), 135-156.

**A two-locus neutrality test : Applications to humans, E. coli and lodgepole pine.** / Hedrick, P. W.; Thomson, G.

Research output: Contribution to journal › Article

*Genetics*, vol. 112, no. 1, pp. 135-156.

}

TY - JOUR

T1 - A two-locus neutrality test

T2 - Applications to humans, E. coli and lodgepole pine

AU - Hedrick, P. W.

AU - Thomson, G.

PY - 1986

Y1 - 1986

N2 - The expected disequilibrium between two loci with k alleles at one locus and l alleles at the other is given for a sample of size n drawn from a population under neutrality equilibrium. Three different measures of disequilibrium with 95% intervals are tabulated for combinations of n, k, l and 4Nc, where N is the effective population size and c is the amount of recombination between the loci. The extent and pattern of disequilibrium are strongly dependent upon 4Nc and are somewhat dependent on n, k and l. The 95% intervals are large, particularly for low numbers of alleles and low values of 4Nc. As examples, observed disequilibrium from histocompatibility loci in humans (HLA) and electrophoretic data in E. coli and lodgepole pine were compared to these theoretical values. Using information about recombination rates, the HLA data showed more disequilibrium than neutrality expectations, whereas electrophoretic data from E. coli and lodgepole pine had somewhat less disequilibrium than neutrality expectations.

AB - The expected disequilibrium between two loci with k alleles at one locus and l alleles at the other is given for a sample of size n drawn from a population under neutrality equilibrium. Three different measures of disequilibrium with 95% intervals are tabulated for combinations of n, k, l and 4Nc, where N is the effective population size and c is the amount of recombination between the loci. The extent and pattern of disequilibrium are strongly dependent upon 4Nc and are somewhat dependent on n, k and l. The 95% intervals are large, particularly for low numbers of alleles and low values of 4Nc. As examples, observed disequilibrium from histocompatibility loci in humans (HLA) and electrophoretic data in E. coli and lodgepole pine were compared to these theoretical values. Using information about recombination rates, the HLA data showed more disequilibrium than neutrality expectations, whereas electrophoretic data from E. coli and lodgepole pine had somewhat less disequilibrium than neutrality expectations.

UR - http://www.scopus.com/inward/record.url?scp=0022574916&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022574916&partnerID=8YFLogxK

M3 - Article

VL - 112

SP - 135

EP - 156

JO - Genetics

JF - Genetics

SN - 0016-6731

IS - 1

ER -