---
_id: '1908'
abstract:
- lang: eng
text: In large populations, multiple beneficial mutations may be simultaneously
spreading. In asexual populations, these mutations must either arise on the same
background or compete against each other. In sexual populations, recombination
can bring together beneficial alleles from different backgrounds, but tightly
linked alleles may still greatly interfere with each other. We show for well-mixed
populations that when this interference is strong, the genome can be seen as consisting
of many effectively asexual stretches linked together. The rate at which beneficial
alleles fix is thus roughly proportional to the rate of recombination and depends
only logarithmically on the mutation supply and the strength of selection. Our
scaling arguments also allow us to predict, with reasonable accuracy, the fitness
distribution of fixed mutations when the mutational effect sizes are broad. We
focus on the regime in which crossovers occur more frequently than beneficial
mutations, as is likely to be the case for many natural populations.
author:
- first_name: Daniel
full_name: Weissman, Daniel
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Oskar
full_name: Hallatschek, Oskar
last_name: Hallatschek
citation:
ama: Weissman D, Hallatschek O. The rate of adaptation in large sexual populations
with linear chromosomes. Genetics. 2014;196(4):1167-1183. doi:10.1534/genetics.113.160705
apa: Weissman, D., & Hallatschek, O. (2014). The rate of adaptation in large
sexual populations with linear chromosomes. Genetics. Genetics Society
of America. https://doi.org/10.1534/genetics.113.160705
chicago: Weissman, Daniel, and Oskar Hallatschek. “The Rate of Adaptation in Large
Sexual Populations with Linear Chromosomes.” Genetics. Genetics Society
of America, 2014. https://doi.org/10.1534/genetics.113.160705.
ieee: D. Weissman and O. Hallatschek, “The rate of adaptation in large sexual populations
with linear chromosomes,” Genetics, vol. 196, no. 4. Genetics Society of
America, pp. 1167–1183, 2014.
ista: Weissman D, Hallatschek O. 2014. The rate of adaptation in large sexual populations
with linear chromosomes. Genetics. 196(4), 1167–1183.
mla: Weissman, Daniel, and Oskar Hallatschek. “The Rate of Adaptation in Large Sexual
Populations with Linear Chromosomes.” Genetics, vol. 196, no. 4, Genetics
Society of America, 2014, pp. 1167–83, doi:10.1534/genetics.113.160705.
short: D. Weissman, O. Hallatschek, Genetics 196 (2014) 1167–1183.
date_created: 2018-12-11T11:54:39Z
date_published: 2014-04-01T00:00:00Z
date_updated: 2021-01-12T06:53:59Z
day: '01'
department:
- _id: NiBa
doi: 10.1534/genetics.113.160705
ec_funded: 1
intvolume: ' 196'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1307.0737
month: '04'
oa: 1
oa_version: Submitted Version
page: 1167 - 1183
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '5187'
quality_controlled: '1'
scopus_import: 1
status: public
title: The rate of adaptation in large sexual populations with linear chromosomes
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 196
year: '2014'
...
---
_id: '1932'
abstract:
- lang: eng
text: The existence of complex (multiple-step) genetic adaptations that are "irreducible"
(i.e., all partial combinations are less fit than the original genotype) is one
of the longest standing problems in evolutionary biology. In standard genetics
parlance, these adaptations require the crossing of a wide adaptive valley of
deleterious intermediate stages. Here, we demonstrate, using a simple model, that
evolution can cross wide valleys to produce "irreducibly complex" adaptations
by making use of previously cryptic mutations. When revealed by an evolutionary
capacitor, previously cryptic mutants have higher initial frequencies than do
new mutations, bringing them closer to a valley-crossing saddle in allele frequency
space. Moreover, simple combinatorics implies an enormous number of candidate
combinations exist within available cryptic genetic variation. We model the dynamics
of crossing of a wide adaptive valley after a capacitance event using both numerical
simulations and analytical approximations. Although individual valley crossing
events become less likely as valleys widen, by taking the combinatorics of genotype
space into account, we see that revealing cryptic variation can cause the frequent
evolution of complex adaptations.
acknowledgement: "Funded by National Institutes of Health. Grant Numbers: R01GM076041,
R01GM104040 \r\n\r\nSimons Foundation\r\n\r\n"
author:
- first_name: Meredith
full_name: Trotter, Meredith
last_name: Trotter
- first_name: Daniel
full_name: Weissman, Daniel
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Grant
full_name: Peterson, Grant
last_name: Peterson
- first_name: Kayla
full_name: Peck, Kayla
last_name: Peck
- first_name: Joanna
full_name: Masel, Joanna
last_name: Masel
citation:
ama: Trotter M, Weissman D, Peterson G, Peck K, Masel J. Cryptic genetic variation
can make "irreducible complexity" a common mode of adaptation
in sexual populations. Evolution. 2014;68(12):3357-3367. doi:10.1111/evo.12517
apa: Trotter, M., Weissman, D., Peterson, G., Peck, K., & Masel, J. (2014).
Cryptic genetic variation can make "irreducible complexity"
a common mode of adaptation in sexual populations. Evolution. Wiley-Blackwell.
https://doi.org/10.1111/evo.12517
chicago: Trotter, Meredith, Daniel Weissman, Grant Peterson, Kayla Peck, and Joanna
Masel. “Cryptic Genetic Variation Can Make "Irreducible Complexity"
a Common Mode of Adaptation in Sexual Populations.” Evolution. Wiley-Blackwell,
2014. https://doi.org/10.1111/evo.12517.
ieee: M. Trotter, D. Weissman, G. Peterson, K. Peck, and J. Masel, “Cryptic genetic
variation can make "irreducible complexity" a common mode of
adaptation in sexual populations,” Evolution, vol. 68, no. 12. Wiley-Blackwell,
pp. 3357–3367, 2014.
ista: Trotter M, Weissman D, Peterson G, Peck K, Masel J. 2014. Cryptic genetic
variation can make "irreducible complexity" a common mode of
adaptation in sexual populations. Evolution. 68(12), 3357–3367.
mla: Trotter, Meredith, et al. “Cryptic Genetic Variation Can Make "Irreducible
Complexity" a Common Mode of Adaptation in Sexual Populations.” Evolution,
vol. 68, no. 12, Wiley-Blackwell, 2014, pp. 3357–67, doi:10.1111/evo.12517.
short: M. Trotter, D. Weissman, G. Peterson, K. Peck, J. Masel, Evolution 68 (2014)
3357–3367.
date_created: 2018-12-11T11:54:47Z
date_published: 2014-12-01T00:00:00Z
date_updated: 2021-01-12T06:54:10Z
day: '01'
department:
- _id: NiBa
doi: 10.1111/evo.12517
ec_funded: 1
intvolume: ' 68'
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1310.6077
month: '12'
oa: 1
oa_version: Submitted Version
page: 3357 - 3367
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
publication: Evolution
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5162'
quality_controlled: '1'
scopus_import: 1
status: public
title: Cryptic genetic variation can make "irreducible complexity" a common
mode of adaptation in sexual populations
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 68
year: '2014'
...
---
_id: '1936'
abstract:
- lang: eng
text: 'The social intelligence hypothesis states that the need to cope with complexities
of social life has driven the evolution of advanced cognitive abilities. It is
usually invoked in the context of challenges arising from complex intragroup structures,
hierarchies, and alliances. However, a fundamental aspect of group living remains
largely unexplored as a driving force in cognitive evolution: the competition
between individuals searching for resources (producers) and conspecifics that
parasitize their findings (scroungers). In populations of social foragers, abilities
that enable scroungers to steal by outsmarting producers, and those allowing producers
to prevent theft by outsmarting scroungers, are likely to be beneficial and may
fuel a cognitive arms race. Using analytical theory and agent-based simulations,
we present a general model for such a race that is driven by the producer-scrounger
game and show that the race''s plausibility is dramatically affected by the nature
of the evolving abilities. If scrounging and scrounging avoidance rely on separate,
strategy-specific cognitive abilities, arms races are short-lived and have a limited
effect on cognition. However, general cognitive abilities that facilitate both
scrounging and scrounging avoidance undergo stable, long-lasting arms races. Thus,
ubiquitous foraging interactions may lead to the evolution of general cognitive
abilities in social animals, without the requirement of complex intragroup structures.'
author:
- first_name: Michal
full_name: Arbilly, Michal
last_name: Arbilly
- first_name: Daniel
full_name: Weissman, Daniel
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Marcus
full_name: Feldman, Marcus
last_name: Feldman
- first_name: Uri
full_name: Grodzinski, Uri
last_name: Grodzinski
citation:
ama: Arbilly M, Weissman D, Feldman M, Grodzinski U. An arms race between producers
and scroungers can drive the evolution of social cognition. Behavioral Ecology.
2014;25(3):487-495. doi:10.1093/beheco/aru002
apa: Arbilly, M., Weissman, D., Feldman, M., & Grodzinski, U. (2014). An arms
race between producers and scroungers can drive the evolution of social cognition.
Behavioral Ecology. Oxford University Press. https://doi.org/10.1093/beheco/aru002
chicago: Arbilly, Michal, Daniel Weissman, Marcus Feldman, and Uri Grodzinski. “An
Arms Race between Producers and Scroungers Can Drive the Evolution of Social Cognition.”
Behavioral Ecology. Oxford University Press, 2014. https://doi.org/10.1093/beheco/aru002.
ieee: M. Arbilly, D. Weissman, M. Feldman, and U. Grodzinski, “An arms race between
producers and scroungers can drive the evolution of social cognition,” Behavioral
Ecology, vol. 25, no. 3. Oxford University Press, pp. 487–495, 2014.
ista: Arbilly M, Weissman D, Feldman M, Grodzinski U. 2014. An arms race between
producers and scroungers can drive the evolution of social cognition. Behavioral
Ecology. 25(3), 487–495.
mla: Arbilly, Michal, et al. “An Arms Race between Producers and Scroungers Can
Drive the Evolution of Social Cognition.” Behavioral Ecology, vol. 25,
no. 3, Oxford University Press, 2014, pp. 487–95, doi:10.1093/beheco/aru002.
short: M. Arbilly, D. Weissman, M. Feldman, U. Grodzinski, Behavioral Ecology 25
(2014) 487–495.
date_created: 2018-12-11T11:54:48Z
date_published: 2014-02-13T00:00:00Z
date_updated: 2021-01-12T06:54:11Z
day: '13'
department:
- _id: NiBa
doi: 10.1093/beheco/aru002
ec_funded: 1
intvolume: ' 25'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4014306/
month: '02'
oa: 1
oa_version: Submitted Version
page: 487 - 495
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
publication: Behavioral Ecology
publication_status: published
publisher: Oxford University Press
publist_id: '5157'
quality_controlled: '1'
scopus_import: 1
status: public
title: An arms race between producers and scroungers can drive the evolution of social
cognition
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 25
year: '2014'
...
---
_id: '3131'
abstract:
- lang: eng
text: 'In large populations, many beneficial mutations may be simultaneously available
and may compete with one another, slowing adaptation. By finding the probability
of fixation of a favorable allele in a simple model of a haploid sexual population,
we find limits to the rate of adaptive substitution, Λ, that depend on simple
parameter combinations. When variance in fitness is low and linkage is loose,
the baseline rate of substitution is Λ 0=2NU〈s〉 is the population size, U is the
rate of beneficial mutations per genome, and 〈s〉 is their mean selective advantage.
Heritable variance ν in log fitness due to unlinked loci reduces Λ by e -4ν under
polygamy and e -8ν under monogamy. With a linear genetic map of length R Morgans,
interference is yet stronger. We use a scaling argument to show that the density
of adaptive substitutions depends on s, N, U, and R only through the baseline
density: Λ/R=F(Λ 0/R). Under the approximation that the interference due to different
sweeps adds up, we show that Λ/R~(Λ 0/R)/(1+2Λ 0/R), implying that interference
prevents the rate of adaptive substitution from exceeding one per centimorgan
per 200 generations. Simulations and numerical calculations confirm the scaling
argument and confirm the additive approximation for Λ 0/R 1; for higher Λ 0/R,
the rate of adaptation grows above R/2, but only very slowly. We also consider
the effect of sweeps on neutral diversity and show that, while even occasional
sweeps can greatly reduce neutral diversity, this effect saturates as sweeps become
more common-diversity can be maintained even in populations experiencing very
strong interference. Our results indicate that for some organisms the rate of
adaptive substitution may be primarily recombination-limited, depending only weakly
on the mutation supply and the strength of selection.'
acknowledgement: "The work was funded by ERC grant 250152.\r\nWe thank B. Charlesworth,
O. Hallatschek, W. G. Hill, R. A. Neher, S. P. Otto, and the anonymous reviewers
for their helpful suggestions."
article_number: e1002740
author:
- first_name: Daniel
full_name: Weissman, Daniel
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Weissman D, Barton NH. Limits to the rate of adaptive substitution in sexual
populations. PLoS Genetics. 2012;8(6). doi:10.1371/journal.pgen.1002740
apa: Weissman, D., & Barton, N. H. (2012). Limits to the rate of adaptive substitution
in sexual populations. PLoS Genetics. Public Library of Science. https://doi.org/10.1371/journal.pgen.1002740
chicago: Weissman, Daniel, and Nicholas H Barton. “Limits to the Rate of Adaptive
Substitution in Sexual Populations.” PLoS Genetics. Public Library of Science,
2012. https://doi.org/10.1371/journal.pgen.1002740.
ieee: D. Weissman and N. H. Barton, “Limits to the rate of adaptive substitution
in sexual populations,” PLoS Genetics, vol. 8, no. 6. Public Library of
Science, 2012.
ista: Weissman D, Barton NH. 2012. Limits to the rate of adaptive substitution in
sexual populations. PLoS Genetics. 8(6), e1002740.
mla: Weissman, Daniel, and Nicholas H. Barton. “Limits to the Rate of Adaptive Substitution
in Sexual Populations.” PLoS Genetics, vol. 8, no. 6, e1002740, Public
Library of Science, 2012, doi:10.1371/journal.pgen.1002740.
short: D. Weissman, N.H. Barton, PLoS Genetics 8 (2012).
date_created: 2018-12-11T12:01:34Z
date_published: 2012-06-07T00:00:00Z
date_updated: 2021-01-12T07:41:17Z
day: '07'
ddc:
- '570'
- '576'
department:
- _id: NiBa
doi: 10.1371/journal.pgen.1002740
ec_funded: 1
file:
- access_level: open_access
checksum: 729a4becda7d786c4c3db8f9a1f77953
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:00Z
date_updated: 2020-07-14T12:46:01Z
file_id: '4659'
file_name: IST-2013-114-v1+1_WeissmanBarton2012.pdf
file_size: 1284801
relation: main_file
file_date_updated: 2020-07-14T12:46:01Z
has_accepted_license: '1'
intvolume: ' 8'
issue: '6'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
publication: PLoS Genetics
publication_status: published
publisher: Public Library of Science
publist_id: '3566'
pubrep_id: '114'
quality_controlled: '1'
scopus_import: 1
status: public
title: Limits to the rate of adaptive substitution in sexual populations
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2012'
...
---
_id: '3303'
abstract:
- lang: eng
text: 'Biological traits result in part from interactions between different genetic
loci. This can lead to sign epistasis, in which a beneficial adaptation involves
a combination of individually deleterious or neutral mutations; in this case,
a population must cross a “fitness valley” to adapt. Recombination can assist
this process by combining mutations from different individuals or retard it by
breaking up the adaptive combination. Here, we analyze the simplest fitness valley,
in which an adaptation requires one mutation at each of two loci to provide a
fitness benefit. We present a theoretical analysis of the effect of recombination
on the valley-crossing process across the full spectrum of possible parameter
regimes. We find that low recombination rates can speed up valley crossing relative
to the asexual case, while higher recombination rates slow down valley crossing,
with the transition between the two regimes occurring when the recombination rate
between the loci is approximately equal to the selective advantage provided by
the adaptation. In large populations, if the recombination rate is high and selection
against single mutants is substantial, the time to cross the valley grows exponentially
with population size, effectively meaning that the population cannot acquire the
adaptation. Recombination at the optimal (low) rate can reduce the valley-crossing
time by up to several orders of magnitude relative to that in an asexual population. '
acknowledgement: "This work was supported in part by a Robert N. Noyce Stanford Graduate
Fellowship and European Research Council grant 250152 (to D.B.W.) and by National
Institutes of Health grant GM 28016 (to M.W.F.).\r\nWe thank Michael Desai for many
ideas and discussions and are grateful to Joanna Masel and an anonymous reviewer
for their helpful suggestions. "
author:
- first_name: Daniel
full_name: Weissman, Daniel
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Marcus
full_name: Feldman, Marcus
last_name: Feldman
- first_name: Daniel
full_name: Fisher, Daniel
last_name: Fisher
citation:
ama: Weissman D, Feldman M, Fisher D. The rate of fitness-valley crossing in sexual
populations. Genetics. 2010;186(4):1389-1410. doi:10.1534/genetics.110.123240
apa: Weissman, D., Feldman, M., & Fisher, D. (2010). The rate of fitness-valley
crossing in sexual populations. Genetics. Genetics Society of America.
https://doi.org/10.1534/genetics.110.123240
chicago: Weissman, Daniel, Marcus Feldman, and Daniel Fisher. “The Rate of Fitness-Valley
Crossing in Sexual Populations.” Genetics. Genetics Society of America,
2010. https://doi.org/10.1534/genetics.110.123240.
ieee: D. Weissman, M. Feldman, and D. Fisher, “The rate of fitness-valley crossing
in sexual populations,” Genetics, vol. 186, no. 4. Genetics Society of
America, pp. 1389–1410, 2010.
ista: Weissman D, Feldman M, Fisher D. 2010. The rate of fitness-valley crossing
in sexual populations. Genetics. 186(4), 1389–1410.
mla: Weissman, Daniel, et al. “The Rate of Fitness-Valley Crossing in Sexual Populations.”
Genetics, vol. 186, no. 4, Genetics Society of America, 2010, pp. 1389–410,
doi:10.1534/genetics.110.123240.
short: D. Weissman, M. Feldman, D. Fisher, Genetics 186 (2010) 1389–1410.
date_created: 2018-12-11T12:02:33Z
date_published: 2010-12-01T00:00:00Z
date_updated: 2021-01-12T07:42:31Z
day: '01'
department:
- _id: NiBa
doi: 10.1534/genetics.110.123240
ec_funded: 1
intvolume: ' 186'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2998319/
month: '12'
oa: 1
oa_version: Submitted Version
page: 1389 - 1410
project:
- _id: 25B07788-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '250152'
name: Limits to selection in biology and in evolutionary computation
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '3337'
quality_controlled: '1'
scopus_import: 1
status: public
title: The rate of fitness-valley crossing in sexual populations
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 186
year: '2010'
...
---
_id: '3304'
abstract:
- lang: eng
text: Complex traits often involve interactions between different genetic loci.
This can lead to sign epistasis, whereby mutations that are individually deleterious
or neutral combine to confer a fitness benefit. In order to acquire the beneficial
genotype, an asexual population must cross a fitness valley or plateau by first
acquiring the deleterious or neutral intermediates. Here, we present a complete,
intuitive theoretical description of the valley-crossing process across the full
spectrum of possible parameter regimes. We calculate the rate at which a population
crosses a fitness valley or plateau of arbitrary width, as a function of the mutation
rates, the population size, and the fitnesses of the intermediates. We find that
when intermediates are close to neutral, a large population can cross even wide
fitness valleys remarkably quickly, so that valley-crossing dynamics may be common
even when mutations that directly increase fitness are also possible. Thus the
evolutionary dynamics of large populations can be sensitive to the structure of
an extended region of the fitness landscape — the population may not take directly
uphill paths in favor of paths across valleys and plateaus that lead eventually
to fitter genotypes. In smaller populations, we find that below a threshold size,
which depends on the width of the fitness valley and the strength of selection
against intermediate genotypes, valley-crossing is much less likely and hence
the evolutionary dynamics are less influenced by distant regions of the fitness
landscape.
author:
- first_name: Daniel
full_name: Daniel Weissman
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Michael
full_name: Desai, Michael M
last_name: Desai
- first_name: Daniel
full_name: Fisher, Daniel S
last_name: Fisher
- first_name: Marcus
full_name: Feldman, Marcus W
last_name: Feldman
citation:
ama: Weissman D, Desai M, Fisher D, Feldman M. The rate at which asexual populations
cross fitness valleys. Theoretical Population Biology. 2009;75(4):286-300.
doi:10.1016/j.tpb.2009.02.006
apa: Weissman, D., Desai, M., Fisher, D., & Feldman, M. (2009). The rate at
which asexual populations cross fitness valleys. Theoretical Population Biology.
Academic Press. https://doi.org/10.1016/j.tpb.2009.02.006
chicago: Weissman, Daniel, Michael Desai, Daniel Fisher, and Marcus Feldman. “The
Rate at Which Asexual Populations Cross Fitness Valleys.” Theoretical Population
Biology. Academic Press, 2009. https://doi.org/10.1016/j.tpb.2009.02.006.
ieee: D. Weissman, M. Desai, D. Fisher, and M. Feldman, “The rate at which asexual
populations cross fitness valleys,” Theoretical Population Biology, vol.
75, no. 4. Academic Press, pp. 286–300, 2009.
ista: Weissman D, Desai M, Fisher D, Feldman M. 2009. The rate at which asexual
populations cross fitness valleys. Theoretical Population Biology. 75(4), 286–300.
mla: Weissman, Daniel, et al. “The Rate at Which Asexual Populations Cross Fitness
Valleys.” Theoretical Population Biology, vol. 75, no. 4, Academic Press,
2009, pp. 286–300, doi:10.1016/j.tpb.2009.02.006.
short: D. Weissman, M. Desai, D. Fisher, M. Feldman, Theoretical Population Biology
75 (2009) 286–300.
date_created: 2018-12-11T12:02:34Z
date_published: 2009-06-01T00:00:00Z
date_updated: 2021-01-12T07:42:31Z
day: '01'
doi: 10.1016/j.tpb.2009.02.006
extern: 1
intvolume: ' 75'
issue: '4'
month: '06'
page: 286 - 300
publication: Theoretical Population Biology
publication_status: published
publisher: Academic Press
publist_id: '3336'
quality_controlled: 0
status: public
title: The rate at which asexual populations cross fitness valleys
type: journal_article
volume: 75
year: '2009'
...
---
_id: '3305'
abstract:
- lang: eng
text: The accumulation of deleterious mutations plays a major role in evolution,
and key to this are the interactions between their fitness effects, known as epistasis.
Whether mutations tend to interact synergistically (with multiple mutations being
more deleterious than would be expected from their individual fitness effects)
or antagonistically is important for a variety of evolutionary questions, particularly
the evolution of sex. Unfortunately, the experimental evidence on the prevalence
and strength of epistasis is mixed and inconclusive. Here we study theoretically
whether synergistic or antagonistic epistasis is likely to be favored by evolution
and by how much. We find that in the presence of recombination, evolution favors
less synergistic or more antagonistic epistasis whenever mutations that change
the epistasis in this direction are possible. This is because evolution favors
increased buffering against the effects of deleterious mutations. This suggests
that we should not expect synergistic epistasis to be widespread in nature and
hence that the mutational deterministic hypothesis for the advantage of sex may
not apply widely.
author:
- first_name: Michael
full_name: Desai, Michael M
last_name: Desai
- first_name: Daniel
full_name: Daniel Weissman
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Marcus
full_name: Feldman, Marcus W
last_name: Feldman
citation:
ama: Desai M, Weissman D, Feldman M. Evolution can favor antagonistic epistasis.
Genetics. 2007;177(2):1001-1010. doi:10.1534/genetics.107.075812
apa: Desai, M., Weissman, D., & Feldman, M. (2007). Evolution can favor antagonistic
epistasis. Genetics. Genetics Society of America. https://doi.org/10.1534/genetics.107.075812
chicago: Desai, Michael, Daniel Weissman, and Marcus Feldman. “Evolution Can Favor
Antagonistic Epistasis.” Genetics. Genetics Society of America, 2007. https://doi.org/10.1534/genetics.107.075812.
ieee: M. Desai, D. Weissman, and M. Feldman, “Evolution can favor antagonistic epistasis,”
Genetics, vol. 177, no. 2. Genetics Society of America, pp. 1001–10, 2007.
ista: Desai M, Weissman D, Feldman M. 2007. Evolution can favor antagonistic epistasis.
Genetics. 177(2), 1001–10.
mla: Desai, Michael, et al. “Evolution Can Favor Antagonistic Epistasis.” Genetics,
vol. 177, no. 2, Genetics Society of America, 2007, pp. 1001–10, doi:10.1534/genetics.107.075812.
short: M. Desai, D. Weissman, M. Feldman, Genetics 177 (2007) 1001–10.
date_created: 2018-12-11T12:02:34Z
date_published: 2007-01-01T00:00:00Z
date_updated: 2021-01-12T07:42:32Z
day: '01'
doi: 10.1534/genetics.107.075812
extern: 1
intvolume: ' 177'
issue: '2'
month: '01'
page: 1001 - 10
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '3335'
quality_controlled: 0
status: public
title: Evolution can favor antagonistic epistasis
type: journal_article
volume: 177
year: '2007'
...