Selective Sweeps Under Dominance and Inbreeding
A major research goal in evolutionary genetics is to uncover loci experiencing positive selection. One approach involves finding ‘selective sweeps’ patterns, which can either be ‘hard sweeps’ formed by de novo mutation, or ‘soft sweeps’ arising from recurrent mutation or existing standing variation....
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2020-03-01
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Online Access: | http://g3journal.org/lookup/doi/10.1534/g3.119.400919 |
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doaj-e4cf01b6ca74473ea091350aced6905e2021-07-02T16:43:46ZengOxford University PressG3: Genes, Genomes, Genetics2160-18362020-03-011031063107510.1534/g3.119.40091919Selective Sweeps Under Dominance and InbreedingMatthew HartfieldThomas BataillonA major research goal in evolutionary genetics is to uncover loci experiencing positive selection. One approach involves finding ‘selective sweeps’ patterns, which can either be ‘hard sweeps’ formed by de novo mutation, or ‘soft sweeps’ arising from recurrent mutation or existing standing variation. Existing theory generally assumes outcrossing populations, and it is unclear how dominance affects soft sweeps. We consider how arbitrary dominance and inbreeding via self-fertilization affect hard and soft sweep signatures. With increased self-fertilization, they are maintained over longer map distances due to reduced effective recombination and faster beneficial allele fixation times. Dominance can affect sweep patterns in outcrossers if the derived variant originates from either a single novel allele, or from recurrent mutation. These models highlight the challenges in distinguishing hard and soft sweeps, and propose methods to differentiate between scenarios.http://g3journal.org/lookup/doi/10.1534/g3.119.400919adaptationdominanceself-fertilisationselective sweepspopulation genetics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Matthew Hartfield Thomas Bataillon |
spellingShingle |
Matthew Hartfield Thomas Bataillon Selective Sweeps Under Dominance and Inbreeding G3: Genes, Genomes, Genetics adaptation dominance self-fertilisation selective sweeps population genetics |
author_facet |
Matthew Hartfield Thomas Bataillon |
author_sort |
Matthew Hartfield |
title |
Selective Sweeps Under Dominance and Inbreeding |
title_short |
Selective Sweeps Under Dominance and Inbreeding |
title_full |
Selective Sweeps Under Dominance and Inbreeding |
title_fullStr |
Selective Sweeps Under Dominance and Inbreeding |
title_full_unstemmed |
Selective Sweeps Under Dominance and Inbreeding |
title_sort |
selective sweeps under dominance and inbreeding |
publisher |
Oxford University Press |
series |
G3: Genes, Genomes, Genetics |
issn |
2160-1836 |
publishDate |
2020-03-01 |
description |
A major research goal in evolutionary genetics is to uncover loci experiencing positive selection. One approach involves finding ‘selective sweeps’ patterns, which can either be ‘hard sweeps’ formed by de novo mutation, or ‘soft sweeps’ arising from recurrent mutation or existing standing variation. Existing theory generally assumes outcrossing populations, and it is unclear how dominance affects soft sweeps. We consider how arbitrary dominance and inbreeding via self-fertilization affect hard and soft sweep signatures. With increased self-fertilization, they are maintained over longer map distances due to reduced effective recombination and faster beneficial allele fixation times. Dominance can affect sweep patterns in outcrossers if the derived variant originates from either a single novel allele, or from recurrent mutation. These models highlight the challenges in distinguishing hard and soft sweeps, and propose methods to differentiate between scenarios. |
topic |
adaptation dominance self-fertilisation selective sweeps population genetics |
url |
http://g3journal.org/lookup/doi/10.1534/g3.119.400919 |
work_keys_str_mv |
AT matthewhartfield selectivesweepsunderdominanceandinbreeding AT thomasbataillon selectivesweepsunderdominanceandinbreeding |
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