scholarly journals Random forest assessment of correlation between environmental factors and genetic differentiation of populations: Case of marine mussels Mytilus

Oceanologia ◽  
2019 ◽  
Vol 61 (1) ◽  
pp. 131-142 ◽  
Author(s):  
Tomasz Kijewski ◽  
Malgorzata Zbawicka ◽  
Jakob Strand ◽  
Hans Kautsky ◽  
Jonne Kotta ◽  
...  
Keyword(s):  
Random Forest ◽  
Environmental Factors ◽  
Genetic Differentiation ◽  
Forest Assessment ◽  
Marine Mussels ◽  
Genetic Differentiation Of Populations

Biochemical Genetic Variation, Growth and Regeneration of the Sea Anemone, Metridium, of British Shores

1985 ◽  
Vol 65 (1) ◽  
pp. 141-157 ◽  
Author(s):  
Ann Bucklin
Keyword(s):  
Genetic Differentiation ◽  
Taxonomic Status ◽  
Sea Anemone ◽  
Sea Anemones ◽  
The United Kingdom ◽  
Metridium Senile ◽  
Genetic Differentiation Of Populations ◽  
Biochemical Genetic ◽  
Enormous Number ◽  
Interesting System

Sessile organisms capable of asexual reproduction may be expected to show much genetic differentiation among local populations: mating between distant individuals is unlikely and genetic drift will contribute to differentiation since habitats can be colonized by one or a few individuals. This study investigates genetic differentiation of populations of the sea anemone Metridium senile (L.) in Great Britain. Individuals of M. senile are sessile and reproduce both sexually, by free-spawning of gametes, and asexually, by regeneration of fragments torn from the pedal disc. Metridium senile is one of the most common and widespread of British sea anemones (Manuel, 1981); reports place it at an enormous number and variety of sites around Britian (unpublished results of surveys by the Underwater Conservation Society of the United Kingdom). The extensive geographic range and variability of the species have confounded attempts to determine the taxonomic status of the ecological and morphological forms, but make it an interesting system for genetic analysis.

scholarly journals Phylogeography of the widespread white-eared hummingbird (Hylocharis leucotis): pre-glacial expansion and genetic differentiation of populations separated by the Isthmus of Tehuantepec

2020 ◽  
Vol 130 (2) ◽  
pp. 247-267
Author(s):  
Luz E Zamudio-Beltrán ◽  
Yuyini Licona-Vera ◽  
Blanca E Hernández-Baños ◽  
John Klicka ◽  
Juan Francisco Ornelas
Keyword(s):  
Genetic Differentiation ◽  
Haplotype Network ◽  
Suitable Habitat ◽  
Glacial Cycles ◽  
Niche Modelling ◽  
Climatic Fluctuations ◽  
History Of ◽  
Genetic Differentiation Of Populations ◽  
Isthmus Of Tehuantepec ◽  
Glacial Expansion

Abstract The Pleistocene glacial cycles had a strong influence on the demography and genetic structure of many species, particularly on northern-latitude taxa. Here we studied the phylogeography of the white-eared hummingbird (Hylocharis leucotis), a widely distributed species of the highlands of Mexico and Central America. Analysis of mitochondrial DNA (mtDNA) sequences was combined with ecological niche modelling (ENM) to infer the demographic and population differentiation scenarios under present and past conditions. Analyses of 108 samples from 11 geographic locations revealed population structure and genetic differentiation among populations separated by the Isthmus of Tehuantepec (IT) and the Motagua-Polochic-Jocotán (MPJ) fault barriers. ENM predicted a widespread distribution of suitable habitat for H. leucotis since the Last Inter Glacial (LIG), but this habitat noticeably contracted and fragmented at the IT. Models for historical dispersal corridors based on population genetics data and ENM revealed the existence of corridors among populations west of the IT; however, the connectivity of populations across the IT has changed little since the LIG. The shallow geographic structure on either side of the isthmus and a star-like haplotype network, combined with the long-term persistence of populations across time based on genetic data and potential dispersal routes, support a scenario of divergence with migration and subsequent isolation and differentiation in Chiapas and south of the MPJ fault. Our findings corroborate the profound effects of Pleistocene climatic fluctuations on the evolutionary history of montane taxa but challenge the generality of expanded suitable habitat (pine-oak forests) during glacial cycles.

Genetic differentiation of populations of Greenlandic Arctic fox

2001 ◽  
Vol 20 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Pia G. Meinke ◽  
Christian M. O. Kapel ◽  
Peter Arctander
Keyword(s):  
Genetic Differentiation ◽  
Arctic Fox ◽  
Genetic Differentiation Of Populations

scholarly journals The Relationships between Chemical and Genetic Differentiation and Environmental Factors across the Distribution of Erigeron breviscapus (Asteraceae)

PLoS ONE ◽  
2013 ◽  
Vol 8 (11) ◽  
pp. e74490 ◽  
Author(s):  
Xiang Li ◽  
Li-yan Peng ◽  
Shu-dong Zhang ◽  
Qin-shi Zhao ◽  
Ting-shuang Yi
Keyword(s):  
Environmental Factors ◽  
Genetic Differentiation ◽  
Erigeron Breviscapus

scholarly journals Population Transcriptomes Reveal the Interspecific Adaptive Genetic Differentiation of Liriodendron by Landscape Genetics

2020 ◽  
Author(s):  
Yufang Shen ◽  
Hui Xia ◽  
Zhonghua Tu ◽  
Yaxian Zong ◽  
Lichun Yang ◽  
...  
Keyword(s):  
Population Structure ◽  
Environmental Factors ◽  
Genetic Differentiation ◽  
Ecological Niche ◽  
Genetic Variations ◽  
Biological Pathways ◽  
Environmental Data ◽  
Genomic Resources ◽  
Population Structure Analysis ◽  
Precipitation Seasonality

Abstract Background: Adaptive genetic differentiation is a hotspot in the research of speciation mechanisms in evolutionary biology. Genomic resources are important for detecting ecological adaptive evolution of non-model plants. Using RNA-seq for non-model plants is a good approach to obtain their genomic resources. The combination of population transcriptome resources and environmental data can provide insights into the genetic mechanism of adaptive genetic differentiation.Results: Based on the population transcriptome data, we investigated the spatial distribution of genetic variations in Liriodendron to detect relationships between ecological factors and genetic differentiation. Environmental data and genetic variations from 17 populations were integrated to detect the population structure, adaptive genes and key environmental factors that shape the population genetic structure by landscape genetic approach. Here, we identified 16592 high-quality single nucleotide polymorphisms (SNPs). The population structure analysis results showed that 17 populations were divided into three groups: L. tulipifera, eastern group and western group of L. chinense. Redundancy analysis and latent factor mixed model analysis suggested that precipitation seasonality, precipitation in the driest quarter, diurnal temperature, and solar radiation in May were closely associated with the adaptive genetic differentiation of Liriodendron. Ecological niche differentiation analysis implied significant ecological niche divergence between L. chinense and L. tulipifera habitats. In total, 858 environment-related loci were identified, which were associated with 464 genes. Pathway enrichment analysis revealed that these genes were significantly enriched in multiple biological pathways. Related studies confirmed that these biological pathways play vital roles in plant growth, development, stress, immune response and photosynthesis.Conclusions: Our research provided empirical evidence that environmental factors may play a key role in driving adaptive genetic differentiation of species. Furthermore, the combination of population transcriptome resources and environmental datasets provides new insights into the study of adaptive genetic differentiation of species.

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