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Three epigenetic information channels and their different roles in evolution.

Shea N, Pen I, Uller T - J. Evol. Biol. (2011)

Bottom Line: However, the evolutionary implications of such alternative mechanisms of inheritance remain unclear.Selection-based epigenetic information is more likely to conflict with somatic cell inheritance than is detection-based epigenetic information.Consequently, the evolutionary implications of epigenetic mechanisms are different for unicellular and multicellular organisms, which underscores the conceptual and empirical importance of distinguishing between these two different forms of transgenerational epigenetic effect.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Philosophy and Somerville College, University of Oxford, Oxford, UK.

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A simple formal model of selection-based and detection-based effects. A population with two phenotypes P1 and P2 is split into two subpopulations living in environments E1 and E2 under selection pressure s against nonmatching phenotypes, and migrating between patches at rate d.
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fig01: A simple formal model of selection-based and detection-based effects. A population with two phenotypes P1 and P2 is split into two subpopulations living in environments E1 and E2 under selection pressure s against nonmatching phenotypes, and migrating between patches at rate d.

Mentions: First, we illustrate the evolution of selection-based effects. Consider a population consisting of two equally large subpopulations in environments E1 and E2, connected by a low rate of migration d (i.e. the probability an individual permanently moves between the two subpopulations before reproducing (Fig. 1)). The life history follows a simple structure with nonoverlapping generations: Reproduction →Development →Migration →Selection →Reproduction. Organisms are haploids and can produce two phenotypes, P1 and P2. In E1, the optimal offspring phenotype is P1, in E2 it is P2. Nonmatching phenotypes have relative fitness 1 − s.


Three epigenetic information channels and their different roles in evolution.

Shea N, Pen I, Uller T - J. Evol. Biol. (2011)

A simple formal model of selection-based and detection-based effects. A population with two phenotypes P1 and P2 is split into two subpopulations living in environments E1 and E2 under selection pressure s against nonmatching phenotypes, and migrating between patches at rate d.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3116147&req=5

fig01: A simple formal model of selection-based and detection-based effects. A population with two phenotypes P1 and P2 is split into two subpopulations living in environments E1 and E2 under selection pressure s against nonmatching phenotypes, and migrating between patches at rate d.
Mentions: First, we illustrate the evolution of selection-based effects. Consider a population consisting of two equally large subpopulations in environments E1 and E2, connected by a low rate of migration d (i.e. the probability an individual permanently moves between the two subpopulations before reproducing (Fig. 1)). The life history follows a simple structure with nonoverlapping generations: Reproduction →Development →Migration →Selection →Reproduction. Organisms are haploids and can produce two phenotypes, P1 and P2. In E1, the optimal offspring phenotype is P1, in E2 it is P2. Nonmatching phenotypes have relative fitness 1 − s.

Bottom Line: However, the evolutionary implications of such alternative mechanisms of inheritance remain unclear.Selection-based epigenetic information is more likely to conflict with somatic cell inheritance than is detection-based epigenetic information.Consequently, the evolutionary implications of epigenetic mechanisms are different for unicellular and multicellular organisms, which underscores the conceptual and empirical importance of distinguishing between these two different forms of transgenerational epigenetic effect.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Philosophy and Somerville College, University of Oxford, Oxford, UK.

Show MeSH
Related in: MedlinePlus