Somatic genetic drift and multi-level selection in modular species

Yu, Lei; Boström, Christoffer; Franzenburg, Sören; Bayer, Till; Reusch, Thorsten B. H.

doi:10.1101/833335

Cited by 2 publications

(4 citation statements)

References 64 publications

(95 reference statements)

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“…This acclimation process can be based on genetic and epigenetic processes, the last fostering rapid adaptive evolution (Douhovnikoff & Dodd, 2015), but it is so far unstudied in seagrasses. Equally, unstudied is the adaptive significance of a large degree of standing somatic genetic variation detected in seagrass clones that could be the basis for adaptation within a genet or clone (Yu et al, 2020). The adaptation occurs through natural selection and requires too long times to react in the face of rapid changes.…”

Section: Discussionmentioning

confidence: 99%

“…The role of somatic mutations in seagrasses was initially assessed by Reusch and Boström (2011) (Reusch & Boström, 2011). Recently, high somatic genetic variation was detected among ramets of a single genet of Z. marina plants (Yu et al, 2020).…”

Section: The Genetic Component Of Phenotypic Plasticitymentioning

confidence: 99%

“…Recently, high somatic genetic variation was detected among ramets of a single genet of Z. marina plants (Yu et al, 2020).…”

Section: F I G U R Ementioning

confidence: 99%

“…Although environmental cues trigger phenotypic differences, the ability to respond is genetically based. Recent evidence suggests that part of this capacity is also due to epigenetic variations (Douhovnikoff & Dodd, 2015) or to somatic mutations that have been shown to segregate among ramets (Yu et al, 2020; see Box 1; Figure 1). If the latter is true, plasticity may interact with “hard‐wired” genetic changes that thus far have been neglected.…”

Section: Introductionmentioning

confidence: 99%

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Phenotypic plasticity under rapid global changes: The intrinsic force for future seagrasses survival

Pazzaglia

Reusch

Terlizzi

et al. 2021

Evolutionary Applications

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Coastal oceans are particularly affected by rapid and extreme environmental changes with dramatic consequences for the entire ecosystem. Seagrasses are key ecosystem engineering or foundation species supporting diverse and productive ecosystems along the coastline that are particularly susceptible to fast environmental changes. In this context, the analysis of phenotypic plasticity could reveal important insights into seagrasses persistence, as it represents an individual property that allows species’ phenotypes to accommodate and react to fast environmental changes and stress. Many studies have provided different definitions of plasticity and related processes (acclimation and adaptation) resulting in a variety of associated terminology. Here, we review different ways to define phenotypic plasticity with particular reference to seagrass responses to single and multiple stressors. We relate plasticity to the shape of reaction norms, resulting from genotype by environment interactions, and examine its role in the presence of environmental shifts. The potential role of genetic and epigenetic changes in underlying seagrasses plasticity in face of environmental changes is also discussed. Different approaches aimed to assess local acclimation and adaptation in seagrasses are explored, explaining strengths and weaknesses based on the main results obtained from the most recent literature. We conclude that the implemented experimental approaches, whether performed with controlled or field experiments, provide new insights to explore the basis of plasticity in seagrasses. However, an improvement of molecular analysis and the application of multi‐factorial experiments are required to better explore genetic and epigenetic adjustments to rapid environmental shifts. These considerations revealed the potential for selecting the best phenotypes to promote assisted evolution with fundamental implications on restoration and preservation efforts.

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Section: Discussionmentioning

confidence: 99%

Section: The Genetic Component Of Phenotypic Plasticitymentioning

confidence: 99%

“…Recently, high somatic genetic variation was detected among ramets of a single genet of Z. marina plants (Yu et al, 2020).…”

Section: F I G U R Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phenotypic plasticity under rapid global changes: The intrinsic force for future seagrasses survival

Pazzaglia

Reusch

Terlizzi

et al. 2021

Evolutionary Applications

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Widespread lateral gene transfer among grasses

Hibdige

Raimondeau

Christin

et al. 2020

Preprint

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Background:Lateral gene transfer (LGT) has been documented in a broad range of eukaryotes, where it can promote adaptation. In plants, LGT of functional nuclear genes has been repeatedly reported in parasitic plants, ferns and grasses, but the exact extent of the phenomenon remains unknown.Systematic studies are now needed to identify the factors that govern the frequency of LGT among plants. Results:Here we scan the genomes of a diverse set of grass species that span more than 50 million years of divergence and include major crops. We identify protein coding LGT in a majority of them (13 out of 17). There is variation among species in the amount of LGT received, with rhizomatous species receiving more genes. In addition, the amount of LGT increases with phylogenetic relatedness, which might reflect genomic compatibility among close relatives facilitating successful transfers.However, we also observe genetic exchanges among distantly related species that diverged shortly after the origin of the grass family when they co-occur in the wild, pointing to a role of biogeography. The dynamics of successful LGT in grasses therefore appear to be dependent on both opportunity (co-occurrence and rhizomes) and compatibility (phylogenetic distance). Conclusion:Overall, we show that LGT is a widespread phenomenon in grasses, which is boosted by repeated contact among related lineages. The process has moved functional genes across the entire grass family into domesticated and wild species alike.LGT among them. The sampled species belong to five different clades of grasses, two from the BOP clade (Oryzoideae and Pooideae) and three from the PACMAD clade (Andropogoneae, Chloridoideae, and Paniceae). Together, these five groups capture more than 8,000 species or 70.5% of the diversity within the whole family (Soreng et al. 2015). In our sampling, each of these five groups is represented by at least two species, allowing us to monitor the number of transfers among each group. In addition, the species represent a variety of domestication status, life-history strategies, genome sizes, and ploidy levels ( Table 1). Using this sampling design, we (i) test whether LGT is more common in certain taxonomic groups, and (ii) test whether some plant characters are associated with a statistical increase of LGT. We then focus on the donors of the LGT received by the Paniceae tribe, a group for which seven genomes are available, to (iii) test whether the number of LGT increases with phylogenetic relatedness. Our work represents the first systematic quantification of LGT among members of a large group of plants and sheds new light on the conditions that promote genetic exchanges across species boundaries in plants. 94 95We modified the approach previously used by Dunning et al. (2019) to identify grass-to-grass LGT.

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Somatic genetic drift and multi-level selection in modular species

Cited by 2 publications

References 64 publications

Phenotypic plasticity under rapid global changes: The intrinsic force for future seagrasses survival

Phenotypic plasticity under rapid global changes: The intrinsic force for future seagrasses survival

Widespread lateral gene transfer among grasses

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