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Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline
Published on: December 7, 2021
The complex analytical landscape of gene flow inference
Peter B Marko1, Michael W Hart
1Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA. pmarko@clemson.edu
Trends in Ecology & Evolution
|July 5, 2011
Summary
Estimating gene flow is crucial for understanding population connectivity and adaptation. New gene genealogy methods offer more accurate insights into demographic histories and genetic variation than traditional approaches.
Area of Science:
- Population genetics
- Landscape genetics
- Conservation biology
Background:
- Gene flow estimation is vital for assessing local adaptation, speciation, and connectivity in populations.
- Current landscape genetics studies often use simplified methods for gene flow, potentially overlooking complex demographic factors.
Purpose of the Study:
- To demonstrate how gene genealogy methods can uncover hidden demographic histories.
- To improve the estimation of gene flow and other drivers of genetic variation.
- To advocate for advanced methods in spatial genetic analyses.
Main Methods:
- Utilized model-based population genetic methods.
- Employed gene genealogy approaches to analyze genetic variation.
- Compared new methods with traditional rules of thumb in landscape genetics.
Main Results:
- Gene genealogy methods revealed cryptic demographic histories.
- These methods provided enhanced estimates of gene flow and related genetic parameters.
- Spatial differentiation was shown to be influenced by multiple interacting forces over time.
Conclusions:
- Gene genealogy methods offer a more robust framework for understanding population genetics.
- A comprehensive approach considering multiple evolutionary forces is recommended over simple gene flow interpretations.
- Further development and application of these advanced methods are encouraged for landscape and seascape genetics.
Related Concept Videos
02:39Gene Flow
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
01:09Mutation, Gene Flow, and Genetic Drift
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
03:33Genetic Drift
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
02:16Genetics of Speciation
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
02:37Gene Duplication and Divergence
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...