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Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

Evolutionary Relationships through Genome Comparisons

Evolutionary 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...

Law of Independent Assortment

Law of Independent Assortment

While Mendel’s Law of Segregation states that the two alleles for one gene are separated into different gametes, a different question of how different genes are inherited remains. For example, is the gene for tall plants inherited with the gene for green peas? Mendel asked this question by experimenting with a dihybrid cross; a cross in which both parents are homozygous for two distinct traits resulting in an F1 generation that are heterozygous for both traits.

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Author Spotlight: Leaf Trait Analysis for Climate and Ecology Reconstruction in Modern and Ancient Plant Communities

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Is there such a thing as landscape genetics?

Rodney J Dyer¹

¹Department of Biology & Center for Environmental Studies, Virginia Commonwealth University, 1000 West Cary Street, Richmond, VA, 23284-2012, USA.

Molecular Ecology

|May 27, 2015

Summary

Landscape genetics (LG) integrates landscape ecology and population genetics. This study uses text mining to analyze LG literature, revealing a split between individual- and population-based approaches and suggesting future research directions.

Keywords:

landscape ecology landscape genetics population genetics

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Area of Science:

Interdisciplinary science
Landscape genetics (LG)
Ecology and evolutionary biology

Background:

Interdisciplinary fields require contributions from multiple disciplines and must offer unique insights.
Landscape genetics (LG) aims to bridge landscape ecology and population genetics.
The current state of LG research needs evaluation to understand its interdisciplinary integration.

Purpose of the Study:

To quantify research questions, mechanistic evaluations, and differentiation from parent disciplines in LG literature.
To identify major factions within LG studies and assess the emergence of new questions.
To highlight the bifurcation between individual- and population-based approaches in LG.

Main Methods:

Comprehensive analysis of peer-reviewed literature self-identified as landscape genetics (LG).
Application of text mining and natural language processing statistical approaches.
Examination of the extent to which emergent questions are being addressed within LG.

Main Results:

Quantification of the types of questions and mechanistic evaluations employed in LG studies.
Identification of a significant bifurcation within LG research, separating individual- and population-based approaches.
Demonstration of how LG differentiates itself from landscape ecology and population genetics.

Conclusions:

LG literature exhibits a deep division between individual- and population-level perspectives.
Further theoretical and analytical advancements are necessary for LG to truly integrate evolution and ecology.
Recommendations are provided for future research to strengthen LG as an interdisciplinary bridge.