Asymmetry in dentition and shape of pharyngeal arches in the clonal fish Chrosomus eos-neogaeus: Phenotypic plasticity and developmental instability

Leung, Christelle; Duclos, Kevin K.; Grünbaum, Thomas; Cloutier, Richard; Angers, Bernard

doi:10.1371/journal.pone.0174235

Cited by 8 publications

(17 citation statements)

References 62 publications

(78 reference statements)

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“…Pure epigenetics are those mechanisms where all variation is entirely independent of the DNA sequence and is due to environmental or stochastic effects only (Johannes et al, 2008;O'Dea et al, 2016). Stochastic developmental variation has been linked to adaptive strategies such as bet-hedging (Vogt, 2015) and has been suggested to generate variation in adaptive traits such as tooth patterning in cyprinid fish and gill morphology and jumping behavior in mangrove Rivulus (Leung, Duclos, Grünbaum, Cloutier, & Angers, 2017;Turko, Earley, & Wright, 2011;Vogt, 2015).…”

Section: Epigenetics 121 | Waddington and Developmental Epigeneticsmentioning

confidence: 99%

“…For instance, the gynogenetic hybrids from the Chrosomus eos-neogaeus hybridization complex offer convenient natural models as they allow the study of genetic replicates in different environments (Castonguay & Angers, 2012). Meristic differences in the numbers of pharyngeal teeth and the presence or absence of a tooth row between C. eos-neogaeus hybrid lineages seem to be linked to alternative developmental pathways triggered by environmental factors (Leung et al, 2017). In addition to meristic variation, pharyngeal arches with missing teeth presented alternative shape phenotypes to their complete counterparts (Leung et al, 2017).…”

Section: Hybridization and Hybrid Complexes As Models To Study The mentioning

confidence: 99%

“…Here, both variation in the presence of teeth and teeth rows and divergence between paired symmetrical elements can be seen as changes in complexity. Individual hybrid genotypes are also known to display DNA methylation patterns that are strongly correlated to environmental differences, displaying increased environmental sensitivity and qualitatively different reaction norms compared to parents (Leung, Breton, & Angers, 2016); variation in these patterns of DNA methylation have been proposed as the mechanism responsible for the changes in teeth patterning and shape variation of pharyngeal arches within and between different genotypes of C. eos-neogaeus (Leung et al, 2017).…”

Section: Hybridization and Hybrid Complexes As Models To Study The mentioning

confidence: 99%

“…Meristic differences in the numbers of pharyngeal teeth and the presence or absence of a tooth row between C. eos‐neogaeus hybrid lineages seem to be linked to alternative developmental pathways triggered by environmental factors (Leung et al, ). In addition to meristic variation, pharyngeal arches with missing teeth presented alternative shape phenotypes to their complete counterparts (Leung et al, ). This change in shape could be a plastic response of the pharyngeal arch compensating for the loss of a tooth or tooth row (Leung et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to meristic variation, pharyngeal arches with missing teeth presented alternative shape phenotypes to their complete counterparts (Leung et al, ). This change in shape could be a plastic response of the pharyngeal arch compensating for the loss of a tooth or tooth row (Leung et al, ). Here, both variation in the presence of teeth and teeth rows and divergence between paired symmetrical elements can be seen as changes in complexity.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the evolution and development of biological complexity under the framework of epigenetics

Duclos

Hendrikse

Jamniczky

2019

Evolution and Development

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Biological complexity is a key component of evolvability, yet its study has been hampered by a focus on evolutionary trends of complexification and inconsistent definitions. Here, we demonstrate the utility of bringing complexity into the framework of epigenetics to better investigate its utility as a concept in evolutionary biology. We first analyze the existing metrics of complexity and explore the link between complexity and adaptation. Although recently developed metrics allow for a unified framework, they omit developmental mechanisms. We argue that a better approach to the empirical study of complexity and its evolution includes developmental mechanisms. We then consider epigenetic mechanisms and their role in shaping developmental and evolutionary trajectories, as well as the development and organization of complexity. We argue that epigenetics itself could have emerged from complexity because of a need to self‐regulate. Finally, we explore hybridization complexes and hybrid organisms as potential models for studying the association between epigenetics and complexity. Our goal is not to explain trends in biological complexity but to help develop and elucidate novel questions in the investigation of biological complexity and its evolution.

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Section: Epigenetics 121 | Waddington and Developmental Epigeneticsmentioning

confidence: 99%

Section: Hybridization and Hybrid Complexes As Models To Study The mentioning

confidence: 99%

Section: Hybridization and Hybrid Complexes As Models To Study The mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigating the evolution and development of biological complexity under the framework of epigenetics

Duclos

Hendrikse

Jamniczky

2019

Evolution and Development

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Effect of a locally adapted genome on environmentally induced epigenetic variation

Angers

2018

Environmental Epigenetics

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Both genetic variation and environmentally induced epigenetic changes allow organisms to persist through the heterogeneity of their habitats. Selection on genetic variation can promote local adaptation of populations. However, in absence of genetic variation, clonal organisms mostly rely on epigenetics to respond to environmental heterogeneity. We used the potential of unisexual organisms in incorporating their host genome, to empirically assess whether the presence of a locally adapted genome affects environmentally induced epigenetic changes in clonal organisms. We addressed this problematic by using unisexual lineages of the kleptogen vertebrate Ambystoma laterale–jeffersonianum complex that can optionally incorporate genetic material from locally adapted sexual hosts through genomic exchanges. More specifically, we compared environmentally induced epigenetic changes between lineages strictly reproducing clonally vs. those incorporating a locally adapted genome. The results revealed that both lineage and sample site components, as well as their interaction, affected epigenetic variation. When lineages were analysed separately, differences among sample sites were only detected in lineages impervious to genomic exchanges. Sample sites had no significant effect on the epigenetic variation of lineages that performed genomic exchanges. These results suggest that environmentally induced epigenetic variation among sites depends more on the lack of locally adapted alleles than on the level of genetic variation.

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Morphology of the inferior pharyngeal bones of white bream (Blicca bjoerkna) in River Warta

Uzar

Andrzejewski

Kozak

2019

Anat Histol Embryol

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The inferior pharyngeal bones are a characteristic feature of the Cyprinidae. Morphology of inferior pharyngeal bones is important in the diagnosis of carnivorous food, or determining the diet of fishes. Due to the lack of literature data, the aim of the study was to examine the morphology of the inferior pharyngeal bone in detail. 102 Blicca bjoerkna specimens caught in the River Warta (Poland) were analysed. 204 inferior pharyngeal bones were collected. The parameters of the inferior pharyngeal bones correlated with the measured head features and the total fish length. The arches of inferior pharyngeal bones did not have directional asymmetry for the two main parameters (height and width of inferior pharyngeal bone). However, there was a left‐sided directional asymmetry of the ventral part of inferior pharyngeal bone. In the case of the B. bjoerkna from River Warta, large differences in terms of individual parameters of inferior pharyngeal bones were observed. Fluctuation asymmetry was low. Shape of inferior pharyngeal bones was very round. In total, 12 teeth formulas were described. The 35.29% of the fish had formula different than described in the literature 2.5–5.2 and more teeth in the right arches. Following identification, measurements of the structures enable estimation of the lengths and weights of prey to be determined from biometric relationships. Analysis of body morphological features in combination with pharyngeal bone morphology could show a hybrid in the Warta river's population.

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Asymmetry in dentition and shape of pharyngeal arches in the clonal fish Chrosomus eos-neogaeus: Phenotypic plasticity and developmental instability

Cited by 8 publications

References 62 publications

Investigating the evolution and development of biological complexity under the framework of epigenetics

Investigating the evolution and development of biological complexity under the framework of epigenetics

Effect of a locally adapted genome on environmentally induced epigenetic variation

Morphology of the inferior pharyngeal bones of white bream (Blicca bjoerkna) in River Warta

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