Stranded alone: The first reported Peruvian population of Agarophyton chilensis is a single-male's clone

Robitzch, Vanessa; Arakaki, Natalia; Mauger, Stéphane; Rojas, José Carlos Zapata; Guillemin, Marie‐Laure

doi:10.1016/j.algal.2019.101527

Cited by 8 publications

(8 citation statements)

References 51 publications

(3 reference statements)

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“…Samples were collected across the entire distributional range of Gracilaria chilensis in the Pacific Ocean (Guillemin et al, 2008(Guillemin et al, , 2014Robitzch et al, 2019;Huanel et al, 2020), including North and South Islands of New Zealand, Chatham Island, and the south of Peru and Chile (Figure 1, Table 1; Table S1). Samples were collected from both rocky shores (i.e., attached individuals resulting from spore settlement, and therefore from sexual reproduction) and soft bottoms (i.e., free-floating thalli propagating vegetatively) when available (Table S1).…”

Section: Samplingmentioning

confidence: 99%

Pre‐domestication bottlenecks of the cultivated seaweed Gracilaria chilensis

et al. 2022

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Gracilaria chilensis is the main cultivated seaweed in Chile. The low genetic diversity observed in the Chilean populations has been associated with the over‐exploitation of natural beds and/or the founder effect that occurred during post‐glacial colonization from New Zealand. How these processes have affected its evolutionary trajectory before farming and incipient domestication is poorly understood. In this study, we used 2232 single nucleotide polymorphisms (SNPs) to assess how the species' evolutionary history in New Zealand (its region of origin), the founder effect linked to transoceanic dispersion and colonization of South America, and the recent over‐exploitation of natural populations have influenced the genetic architecture of G. chilensis in Chile. The contrasting patterns of genetic diversity and structure observed between the two main islands in New Zealand attest to the important effects of Quaternary glacial cycles on G. chilensis. Approximate Bayesian Computation (ABC) analyses indicated that Chatham Island and South America were colonized independently near the end of the Last Glacial Maximum and emphasized the importance of coastal and oceanic currents during that period. Furthermore, ABC analyses inferred the existence of a recent and strong genetic bottleneck in Chile, matching the period of over‐exploitation of the natural beds during the 1970s, followed by rapid demographic expansion linked to active clonal propagation used in farming. Recurrent genetic bottlenecks strongly eroded the genetic diversity of G. chilensis prior to its cultivation, raising important challenges for the management of genetic resources in this incipiently domesticated species.

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Section: Samplingmentioning

confidence: 99%

Pre‐domestication bottlenecks of the cultivated seaweed Gracilaria chilensis

et al. 2022

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“…Reproductive mode (sexual vs. asexual reproduction) affects genetic diversity within populations and the amount of genetic differentiation among them (Ellegren & Galtier, 2016 ; Hamrigk & Godt, 1996 ). Moreover, reproductive mode can vary intraspecifically among populations, for instance, in plants (Johnson et al, 2020 ; Li et al, 2018 ) and algae (Loffler et al, 2018 ; Robitzch et al, 2019 ; Tatarenkov et al, 2005 ; Yamano et al, 2020 ). Both reproductive modes may also occur simultaneously within an individual (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, reproductive mode can vary intraspecifically among populations, for instance, in plants (Johnson et al, 2020;Li et al, 2018) and algae (Loffler et al, 2018;Robitzch et al, 2019;Tatarenkov et al, 2005;Yamano et al, 2020). Both reproductive modes may also occur simultaneously within an individual (e.g.…”

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confidence: 99%

Clonality, polyploidy and spatial population structure in Baltic Sea Fucus vesiculosus

Preston

Blomster

Schagerström

et al. 2022

Ecology and Evolution

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Genetic characteristics of populations can have substantial impacts on the adaptive potential of a species. Species are heterogeneous, often defined by variability at a range of scales including at the genetic, individual and population level. Using microsatellite genotyping, we characterize patterns underlying the genetic heterogeneity in marine macroalga Fucus vesiculosus, with a particular focus on two forms: attached and free‐living. Here we demonstrate that sympatric populations representing the two forms display marked differences in characteristics of reproduction and genetic diversity. Asexual reproduction was ubiquitous in the free‐living form despite being almost entirely absent in the attached form, while signals of polyploidy were common in both forms despite the distinct reproductive modes. Gene flow within and between the forms differed, with barriers to gene flow occurring between forms at various spatial scales due to the reproductive modes employed by individuals of each form. The divergent genetic characteristics of F. vesiculosus demonstrate that intraspecific differences can influence the properties of populations with consequential effects on the whole ecosystem. The differing genetic patterns and habitat requirements of the two forms define separate but closely associated ecological entities that will likely display divergent responses to future changes in environmental conditions.

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“…The edible Chilean red macroalgae Agarophyton chilense (formerly Gracilaria chilensis) [1], commonly known as "pelillo", has been used as a food and medicinal herb since pre-Hispanic times in Chile, as indicated by findings at the archaeological site of Monte Verde (~14,000 years ago) [2]. Agarophyton chilense (A. chilense) is distributed in New Zealand (including Chatham Island) and South America [3][4][5][6], and although this species has good nutritional potential, it is mainly exploited for the extraction of agar-agar, a hydrocolloid [7,8].…”

Section: Introductionmentioning

confidence: 99%

Characterization of an Agarophyton chilense Oleoresin Containing PPARγ Natural Ligands with Insulin-Sensitizing Effects in a C57Bl/6J Mouse Model of Diet-Induced Obesity and Antioxidant Activity in Caenorhabditis elegans

et al. 2021

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The biomedical potential of the edible red seaweed Agarophyton chilense (formerly Gracilaria chilensis) has not been explored. Red seaweeds are enriched in polyunsaturated fatty acids and eicosanoids, which are known natural ligands of the PPARγ nuclear receptor. PPARγ is the molecular target of thiazolidinediones (TZDs), drugs used as insulin sensitizers to treat type 2 diabetes mellitus. Medical use of TZDs is limited due to undesired side effects, a problem that has triggered the search for selective PPARγ modulators (SPPARMs) without the TZD side effects. We produced Agarophyton chilense oleoresin (Gracilex®), which induces PPARγ activation without inducing adipocyte differentiation, similar to SPPARMs. In a diet-induced obesity model of male mice, we showed that treatment with Gracilex®improves insulin sensitivity by normalizing altered glucose and insulin parameters. Gracilex®is enriched in palmitic acid, arachidonic acid, oleic acid, and lipophilic antioxidants such as tocopherols and β-carotene. Accordingly, Gracilex® possesses antioxidant activity in vitro and increased antioxidant capacity in vivo in Caenorhabditis elegans. These findings support the idea that Gracilex® represents a good source of natural PPARγ ligands and antioxidants with the potential to mitigate metabolic disorders. Thus, its nutraceutical value in humans warrants further investigation.

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Stranded alone: The first reported Peruvian population of Agarophyton chilensis is a single-male's clone

Cited by 8 publications

References 51 publications

Pre‐domestication bottlenecks of the cultivated seaweed Gracilaria chilensis

Pre‐domestication bottlenecks of the cultivated seaweed Gracilaria chilensis

Clonality, polyploidy and spatial population structure in Baltic Sea Fucus vesiculosus

Characterization of an Agarophyton chilense Oleoresin Containing PPARγ Natural Ligands with Insulin-Sensitizing Effects in a C57Bl/6J Mouse Model of Diet-Induced Obesity and Antioxidant Activity in Caenorhabditis elegans

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