scholarly journals Non-genetic inheritance in evolutionary theory - the importance of plant studies

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Marta Robertson ◽  
Christina Richards
Keyword(s):  
Evolutionary Theory ◽  
Evolutionary Process ◽  
Epigenetic Inheritance ◽  
Causal Role ◽  
Epigenetic Variation ◽  
Epigenetic Mechanisms ◽  
Epigenetic Machinery ◽  
Evolutionary Studies ◽  
Modern Evolutionary Theory

AbstractEmerging evidence points to a causal role for epigenetic variation in evolution, but evolutionary biologists have been reluctant to incorporate epigenetics into modern evolutionary theory. Part of this ambivalence comes from the assumption that epigenetic inheritance is only relevant to the evolution of plants, which is perpetuated by a comparative lack of evolutionary studies in animals. However, although most of the evidence for epigenetic inheritance comes from plants, plants and animals share many homologous epigenetic mechanisms, and plants provide a more tractable system for investigating the causal role of epigenetic mechanisms underlying phenotypic variation and its relationship with fitness. The insights from studies of epigenetic inheritance in plants may be applicable across a broad range of taxa once we establish commonalities and differences in epigenetic machinery. In this paper we present evidence for a role of epigenetic mechanisms in the evolutionary process and discuss common objections to incorporating epigenetics into evolutionary theory. This review is not exhaustive, but is meant to demonstrate that epigenetic inheritance can be incorporated into current evolutionary theory without overhauling its foundations.

scholarly journals Intergenerational epigenetic inheritance in reef-building corals

2018 ◽  
Author(s):  
Yi Jin Liew ◽  
Emily J. Howells ◽  
Xin Wang ◽  
Craig T. Michell ◽  
John A. Burt ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Intergenerational Transmission ◽  
Epigenetic Inheritance ◽  
Cpg Methylation ◽  
Epigenetic Mechanisms ◽  
Transgenerational Inheritance ◽  
Genome Wide ◽  
Methylation Patterns ◽  
Hypermethylated Genes

MainThe notion that intergenerational or transgenerational inheritance operates solely through genetic means is slowly being eroded: epigenetic mechanisms have been shown to induce heritable changes in gene activity in plants1,2and metazoans1,3. Inheritance of DNA methylation provides a potential pathway for environmentally induced phenotypes to contribute to evolution of species and populations1–4. However, in basal metazoans, it is unknown whether inheritance of CpG methylation patterns occurs across the genome (as in plants) or as rare exceptions (as in mammals)4. Here, we demonstrate genome-wide intergenerational transmission of CpG methylation patterns from parents to sperm and larvae in a reef-building coral. We also show variation in hypermethylated genes in corals from distinct environments, indicative of responses to variations in temperature and salinity. These findings support a role of DNA methylation in the transgenerational inheritance of traits in corals, which may extend to enhancing their capacity to adapt to climate change.

scholarly journals The Key Role of Epigenetics in the Persistence of Asexual Lineages

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Emilie Castonguay ◽  
Bernard Angers
Keyword(s):  
Phenotypic Plasticity ◽  
Recent Work ◽  
Molecular Mechanism ◽  
Crucial Role ◽  
Environmental Variation ◽  
Epigenetic Modifications ◽  
Epigenetic Variation ◽  
Epigenetic Mechanisms ◽  
Evolutionary Persistence

Asexual organisms, often perceived as evolutionary dead ends, can be long-lived and geographically widespread. We propose that epigenetic mechanisms could play a crucial role in the evolutionary persistence of these lineages. Genetically identical organisms could rely on phenotypic plasticity to face environmental variation. Epigenetic modifications could be the molecular mechanism enabling such phenotypic plasticity; they can be influenced by the environment and act at shorter timescales than mutation. Recent work on the asexual vertebrate Chrosomus eos-neogaeus (Pisces: Cyprinidae) provides broad insights into the contribution of epigenetics in genetically identical individuals. We discuss the extension of these results to other asexual organisms, in particular those resulting from interspecific hybridizations. We finally develop on the evolutionary relevance of epigenetic variation in the context of heritability.

Contemporary Teleology

Teleology ◽  
2020 ◽  
pp. 255-278
Author(s):  
Jeffrey K. McDonough
Keyword(s):  
Evolutionary Theory ◽  
Biological Function ◽  
Natural Sciences ◽  
Biological Science ◽  
Causal Role ◽  
Modern Evolutionary Theory

Many contemporary thinkers see a challenge to teleology that accompanied Darwin’s proposal of modern evolutionary theory. This chapter articulates this challenge, and reviews the two primary contemporary approaches to teleology: etiological versus causal role accounts of biological function. Both approaches attempt to naturalize teleology—to analyze teleology in a way consistent with the natural sciences, especially biological science. While this is an enormously productive endeavor, there are some reasons to be skeptical about the ultimate success of this approach to teleology.

Epigenetics and Behavior

2015 ◽  
Author(s):  
Eva Jablonka ◽  
Zohar Bronfman
Keyword(s):  
Gene Expression ◽  
Dna Sequence ◽  
Regulation Of Gene Expression ◽  
Ecological Factors ◽  
Epigenetic Inheritance ◽  
Epigenetic Mechanisms ◽  
Developmental Context ◽  
Dividing Cells ◽  
And Behavior

Behavioral epigenetics is part of the thriving field of epigenetics, which describes the study of developmental processes that lead to persistent changes in the states of organisms, their components, and their lineages. Such developmental, context-sensitive changes are mediated by epigenetic mechanisms that establish and maintain the changes in patterns of gene expression and cellular structures that occur during ontogeny in both nondividing cells, such as most mature neurons, and dividing cells such as stem cells. When information is vertically transmitted to cells during cell division, or horizontally between cells through migrating reproducing molecules (like small RNAs), and when variations in the transmitted information are not determined by variations in DNA sequence (i.e., the same DNA sequence has more than one cell-heritable epigenetic state), epigenetic inheritance is said to occur. Behavioral epigenetics investigates the role of behavior in the shaping of developmental epigenetic states and the reciprocal role of epigenetic factors and mechanisms in the shaping of the behavior of human and nonhuman animals, at the short-, middle-, and long-term (ontogenetic, ecological, and evolutionary) time scales. The focus is on the molecular-epigenetic study of the interactions between environmental factors, such as ecological factors and habitual activities such as lifestyles and learning, with genetic variation and the neurobiological and physiological mechanisms that mediate between the regulation of gene expression and behavior. This range of epigenetic processes therefore includes, but is not limited to, studies involving epigenetic inheritance and the direct and indirect evolutionary effects of epigenetic developmental mechanisms. The neural-behavioral aspects that occur during ontogeny through the mediation of epigenetic mechanisms are central to behavioral epigenetics and are the main focus of neural epigenetics.

scholarly journals Who's afraid of epigenetics? Habits, instincts, and Charles Darwin’s evolutionary theory

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Mariagrazia Portera ◽  
Mauro Mandrioli
Keyword(s):  
Natural Selection ◽  
Evolutionary Theory ◽  
Crucial Role ◽  
Epigenetic Inheritance ◽  
Point Of View ◽  
Epigenetic Mechanisms ◽  
Intellectual Life ◽  
Entire Life ◽  
Theory Of Evolution ◽  
Expression Of Genes

AbstractOur paper aims at bringing to the fore the crucial role that habits play in Charles Darwin’s theory of evolution by means of natural selection. We have organized the paper in two steps: first, we analyse value and functions of the concept of habit in Darwin's early works, notably in his Notebooks, and compare these views to his mature understanding of the concept in the Origin of Species and later works; second, we discuss Darwin’s ideas on habits in the light of today’s theories of epigenetic inheritance, which describe the way in which the functioning and expression of genes is modified by the environment, and how these modifications are transmitted over generations. We argue that Darwin’s lasting and multifaceted interest in the notion of habit, throughout his intellectual life, is both conceptually and methodologically relevant. From a conceptual point of view, intriguing similarities can be found between Darwin’s (early) conception of habit and contemporary views on epigenetic inheritance. From a methodological point of view, we suggest that Darwin’s plastic approach to habits, from his early writings up to the mature works, can provide today’s evolutionary scientists with a viable methodological model to address the challenging task of extending and expanding evolutionary theory, with particular reference to the integration of epigenetic mechanisms into existing models of evolutionary change. Over his entire life Darwin has modified and reassessed his views on habits as many times as required by evidence: his work on this notion may represent the paradigm of a habit of good scientific research methodology.

scholarly journals Environmentally-Induced Transgenerational Epigenetic Inheritance: Implication of PIWI Interacting RNAs

Cells ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1108 ◽  
Author(s):  
Karine Casier ◽  
Antoine Boivin ◽  
Clément Carré ◽  
Laure Teysset
Keyword(s):  
Small Rnas ◽  
Epigenetic Inheritance ◽  
Disease Development ◽  
Epigenetic Mechanisms ◽  
Transgenerational Inheritance ◽  
Epigenetic Memory ◽  
Transgenerational Epigenetic Inheritance ◽  
Open Questions ◽  
Sporadic Disease

Environmentally-induced transgenerational epigenetic inheritance is an emerging field. The understanding of associated epigenetic mechanisms is currently in progress with open questions still remaining. In this review, we present an overview of the knowledge of environmentally-induced transgenerational inheritance and associated epigenetic mechanisms, mainly in animals. The second part focuses on the role of PIWI-interacting RNAs (piRNAs), a class of small RNAs involved in the maintenance of the germline genome, in epigenetic memory to put into perspective cases of environmentally-induced transgenerational inheritance involving piRNA production. Finally, the last part addresses how genomes are facing production of new piRNAs, and from a broader perspective, how this process might have consequences on evolution and on sporadic disease development.

scholarly journals The Demsetz’s Evolutionary Theory of Property Rights as Applied to Rural Land of China: A Supplement

Land ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 888
Author(s):  
Yanlong Zhang
Keyword(s):  
Property Rights ◽  
Evolutionary Theory ◽  
Evolutionary Process ◽  
Rural Land ◽  
Organizational Complexity ◽  
Collective Ownership ◽  
Collective Control ◽  
Private Control ◽  
Family Based

The main objective of this article is to contribute to the literature on land issues, especially with regard to the evolutionary theory of China’s rural land property rights. This article applies the Demsetz’s evolutionary theory of property rights as a framework into an analysis of the evolutionary process of property rights in rural land of China. It is found that externality, compactness, productivity, and organizational complexity—four principles in Demsetz’s framework—are at the core of understanding the evolution of property rights from collective control of land to family based control of land in China. However, the framework is incomplete due to being unlikely to notice the role of land titling so that a property rights game is developed in this article to extend the evolutionary theory of property rights. Importantly, it suggests the necessity of “split-rights” from family based control land to private control land in China. To sum up, this paper refreshes the dominant framework of analysis on the evolution of property rights in mainstream economics, and makes it discern when collective ownership does not evolve into pure privatization, finally, instead of into private control of land, as is currently applied to rural area in China.

How do histone modifications contribute to transgenerational epigenetic inheritance in C. elegans?

2020 ◽  
Vol 48 (3) ◽  
pp. 1019-1034 ◽  
Author(s):  
Rachel M. Woodhouse ◽  
Alyson Ashe
Keyword(s):  
Histone Modifications ◽  
Molecular Mechanisms ◽  
Epigenetic Inheritance ◽  
Nematode Caenorhabditis Elegans ◽  
Histone Methyltransferases ◽  
Transgenerational Epigenetic Inheritance ◽  
C Elegans ◽  
Recent Developments ◽  
Gene Regulatory

Gene regulatory information can be inherited between generations in a phenomenon termed transgenerational epigenetic inheritance (TEI). While examples of TEI in many animals accumulate, the nematode Caenorhabditis elegans has proven particularly useful in investigating the underlying molecular mechanisms of this phenomenon. In C. elegans and other animals, the modification of histone proteins has emerged as a potential carrier and effector of transgenerational epigenetic information. In this review, we explore the contribution of histone modifications to TEI in C. elegans. We describe the role of repressive histone marks, histone methyltransferases, and associated chromatin factors in heritable gene silencing, and discuss recent developments and unanswered questions in how these factors integrate with other known TEI mechanisms. We also review the transgenerational effects of the manipulation of histone modifications on germline health and longevity.

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