Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes
The patterns and mechanisms underlying the genetic structure of microbial populations remain unresolved. Herein we investigated the role played by two non-mutually exclusive models (i.e. isolation by distance and isolation by environment) in shaping the genetic structure of lacustrine populations of...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01686496_v93_n10_p_Fernandez http://hdl.handle.net/20.500.12110/paper_01686496_v93_n10_p_Fernandez |
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paper:paper_01686496_v93_n10_p_Fernandez2023-06-08T15:17:56Z Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes Freshwater protist Gene flow Mamiellophyceae Microbial populations Phytoplankton Picoeukaryote environmental conditions eukaryote freshwater environment gene flow genetic differentiation genetic structure lacustrine environment microalga microbial community microorganism phytoplankton population structure protist Patagonia Chlorophyta Protista spacer DNA Argentina Bayes theorem classification gene flow genetic variation genetics geography green alga haplotype lake microalga population genetics reproductive isolation Argentina Bayes Theorem Chlorophyta DNA, Intergenic Gene Flow Genetic Variation Genetics, Population Geography Haplotypes Lakes Microalgae Reproductive Isolation The patterns and mechanisms underlying the genetic structure of microbial populations remain unresolved. Herein we investigated the role played by two non-mutually exclusive models (i.e. isolation by distance and isolation by environment) in shaping the genetic structure of lacustrine populations of a microalga (a freshwater Bathycoccaceae) in the Argentinean Patagonia. To our knowledge, this was the first study to investigate the genetic population structure in a South American microorganism. Population-level analyses based on ITS1-5.8S-ITS2 sequences revealed high levels of nucleotide and haplotype diversity within and among populations. Fixation index and a spatially explicit Bayesian analysis confirmed the occurrence of genetically distinct microalga populations in Patagonia. Isolation by distance and isolation by environment accounted for 38.5% and 17.7% of the genetic structure observed, respectively, whereas together these models accounted for 41% of the genetic differentiation. While our results highlighted isolation by distance and isolation by environment as important mechanisms in driving the genetic population structure of the microalga studied, none of these models (either alone or together) could explain the entire genetic differentiation observed. The unexplained variation in the genetic differentiation observed could be the result of founder events combined with rapid local adaptations, as proposed by the monopolisation hypothesis. © FEMS 2017. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01686496_v93_n10_p_Fernandez http://hdl.handle.net/20.500.12110/paper_01686496_v93_n10_p_Fernandez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Freshwater protist Gene flow Mamiellophyceae Microbial populations Phytoplankton Picoeukaryote environmental conditions eukaryote freshwater environment gene flow genetic differentiation genetic structure lacustrine environment microalga microbial community microorganism phytoplankton population structure protist Patagonia Chlorophyta Protista spacer DNA Argentina Bayes theorem classification gene flow genetic variation genetics geography green alga haplotype lake microalga population genetics reproductive isolation Argentina Bayes Theorem Chlorophyta DNA, Intergenic Gene Flow Genetic Variation Genetics, Population Geography Haplotypes Lakes Microalgae Reproductive Isolation |
| spellingShingle |
Freshwater protist Gene flow Mamiellophyceae Microbial populations Phytoplankton Picoeukaryote environmental conditions eukaryote freshwater environment gene flow genetic differentiation genetic structure lacustrine environment microalga microbial community microorganism phytoplankton population structure protist Patagonia Chlorophyta Protista spacer DNA Argentina Bayes theorem classification gene flow genetic variation genetics geography green alga haplotype lake microalga population genetics reproductive isolation Argentina Bayes Theorem Chlorophyta DNA, Intergenic Gene Flow Genetic Variation Genetics, Population Geography Haplotypes Lakes Microalgae Reproductive Isolation Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| topic_facet |
Freshwater protist Gene flow Mamiellophyceae Microbial populations Phytoplankton Picoeukaryote environmental conditions eukaryote freshwater environment gene flow genetic differentiation genetic structure lacustrine environment microalga microbial community microorganism phytoplankton population structure protist Patagonia Chlorophyta Protista spacer DNA Argentina Bayes theorem classification gene flow genetic variation genetics geography green alga haplotype lake microalga population genetics reproductive isolation Argentina Bayes Theorem Chlorophyta DNA, Intergenic Gene Flow Genetic Variation Genetics, Population Geography Haplotypes Lakes Microalgae Reproductive Isolation |
| description |
The patterns and mechanisms underlying the genetic structure of microbial populations remain unresolved. Herein we investigated the role played by two non-mutually exclusive models (i.e. isolation by distance and isolation by environment) in shaping the genetic structure of lacustrine populations of a microalga (a freshwater Bathycoccaceae) in the Argentinean Patagonia. To our knowledge, this was the first study to investigate the genetic population structure in a South American microorganism. Population-level analyses based on ITS1-5.8S-ITS2 sequences revealed high levels of nucleotide and haplotype diversity within and among populations. Fixation index and a spatially explicit Bayesian analysis confirmed the occurrence of genetically distinct microalga populations in Patagonia. Isolation by distance and isolation by environment accounted for 38.5% and 17.7% of the genetic structure observed, respectively, whereas together these models accounted for 41% of the genetic differentiation. While our results highlighted isolation by distance and isolation by environment as important mechanisms in driving the genetic population structure of the microalga studied, none of these models (either alone or together) could explain the entire genetic differentiation observed. The unexplained variation in the genetic differentiation observed could be the result of founder events combined with rapid local adaptations, as proposed by the monopolisation hypothesis. © FEMS 2017. |
| title |
Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| title_short |
Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| title_full |
Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| title_fullStr |
Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| title_full_unstemmed |
Geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (Bathycoccaceae; Chlorophyta) in Patagonian lakes |
| title_sort |
geographical distance and local environmental conditions drive the genetic population structure of a freshwater microalga (bathycoccaceae; chlorophyta) in patagonian lakes |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01686496_v93_n10_p_Fernandez http://hdl.handle.net/20.500.12110/paper_01686496_v93_n10_p_Fernandez |
| _version_ |
1768543605001027584 |