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Evolutionary dynamics of the FMR1 locus

Evolutionary dynamics of the FMR1 locus
Evolutionary dynamics of the FMR1 locus
Rare haplotypes for close flanking markers are associated with increased allele size and frequency of the fragile X mutation. Exceptional founder haplotypes can be identified, but many haplotypes with rare alleles contribute to full mutations. A transition matrix constructed from the data predicts that a population with reduced variability will manifest a slowly increasing frequency of premutations and full mutations, reach a distribution close to the observed one after a few hundred generations, and then slowly be depleted of these alleles. This prediction is opposite to less well supported inference of increasing frequency of progressive amplification, but the data are inadequate to reach any firm conclusions. Factors that may determine the evolution of these systems, but cannot now be evaluated, are discussed.
0003-4800
283-289
Morris, A.
ce4c70ee-e67e-49a7-85b5-8b4ae6b089b7
MORTON, N. E.
4366f051-4ca0-43fd-9ba5-1dd45aaa4816
Collins, A.
7daa83eb-0b21-43b2-af1a-e38fb36e2a64
Lawrence, S.
7d8ad1ee-4204-4e03-a516-0dc0c7363212
Macpherson, J. N.
1069e9a6-a4c5-47da-b08e-e370ce281502
Morris, A.
ce4c70ee-e67e-49a7-85b5-8b4ae6b089b7
MORTON, N. E.
4366f051-4ca0-43fd-9ba5-1dd45aaa4816
Collins, A.
7daa83eb-0b21-43b2-af1a-e38fb36e2a64
Lawrence, S.
7d8ad1ee-4204-4e03-a516-0dc0c7363212
Macpherson, J. N.
1069e9a6-a4c5-47da-b08e-e370ce281502

Morris, A., MORTON, N. E., Collins, A., Lawrence, S. and Macpherson, J. N. (1995) Evolutionary dynamics of the FMR1 locus. Annals of Human Genetics, 59 (3), 283-289. (doi:10.1111/j.1469-1809.1995.tb00748.x).

Record type: Article

Abstract

Rare haplotypes for close flanking markers are associated with increased allele size and frequency of the fragile X mutation. Exceptional founder haplotypes can be identified, but many haplotypes with rare alleles contribute to full mutations. A transition matrix constructed from the data predicts that a population with reduced variability will manifest a slowly increasing frequency of premutations and full mutations, reach a distribution close to the observed one after a few hundred generations, and then slowly be depleted of these alleles. This prediction is opposite to less well supported inference of increasing frequency of progressive amplification, but the data are inadequate to reach any firm conclusions. Factors that may determine the evolution of these systems, but cannot now be evaluated, are discussed.

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More information

Published date: 1 July 1995

Identifiers

Local EPrints ID: 475745
URI: http://eprints.soton.ac.uk/id/eprint/475745
ISSN: 0003-4800
PURE UUID: b6da5812-6a6f-4e03-92b4-98669ebd0bd1
ORCID for A. Collins: ORCID iD orcid.org/0000-0001-7108-0771

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Date deposited: 27 Mar 2023 16:45
Last modified: 17 Mar 2024 02:38

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Contributors

Author: A. Morris
Author: N. E. MORTON
Author: A. Collins ORCID iD
Author: S. Lawrence
Author: J. N. Macpherson

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