Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Stratified Sampling Method01:16

Stratified Sampling Method

Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a stratified sample, divide the population into groups called strata and then take a...
Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
Distributions to Estimate Population Parameter01:26

Distributions to Estimate Population Parameter

The accurate values of population parameters such as population proportion, population mean, and population standard deviation (or variance) are usually unknown. These are fixed values that can only be estimated from the data collected from the samples. The estimates of each of these parameters are sample proportion, the sample mean, and sample standard deviation (or variance). To obtain the values of these sample statistics, data are required that have particular distribution and central...
Cochran's Q Test01:17

Cochran's Q Test

Cochran's Q Test is a nonparametric statistical test used to determine if there are potential differences in the outcomes of three or more related groups on a binary (yes/no) or dichotomous outcome. It is essentially an extension of the McNemar Test, which is limited to two related samples - Cochran's Q test can handle three or more related samples, making it more versatile in scenarios where subjects are measured under multiple conditions. The test statistic follows a Chi-Square distribution,...
What are Populations and Communities?00:30

What are Populations and Communities?

Overview
Population Growth00:57

Population Growth

Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Powering the Circumplex: A Practical Guide to Sample Size for the Structural Summary Method.

Assessmentยท2026
Same author

Nothing About Us Without Us: Centering Lived Experience as the AMPD Moves Forward.

Personality and mental healthยท2026
Same author

The DSM-5 Alternative Model of Personality Disorder's Coverage of Borderline Personality Concepts.

Personality and mental healthยท2026
Same author

The impact of purifying selection and genetic drift on the distribution of dominance coefficients.

Evolution; international journal of organic evolutionยท2026
Same author

Criterion A as Developmental Severity: Reclaiming the Psychodynamic Core of Personality Functioning.

Personality and mental healthยท2025
Same author

Borderline personality disorder does not predict treatment outcome in a partial hospital program independent of internalizing and harmful substance use dimensions.

Personality disordersยท2025
Same journal

From Gene Copies to Cell Numbers: Advancing Quantitative Approaches in Protistan Ecology Using Digital PCR.

Molecular ecology resourcesยท2026
Same journal

EasyCen: A Lightweight Framework for Centromere Localisation and Repeat-Organisation Profiling in Telomere-to-Telomere Genomes.

Molecular ecology resourcesยท2026
Same journal

A Practical Framework for GT-Seq Panel Optimization.

Molecular ecology resourcesยท2026
Same journal

Comparison of Environmental DNA and Bulk DNA Metabarcoding for Assessing Terrestrial Arthropod Diversity Across Three Habitat Types on Guam.

Molecular ecology resourcesยท2026
Same journal

pr2-Wormifier: A Bioinformatics Pipeline to Create Custom Reference Databases for Improved Metabarcoding of Marine Protists.

Molecular ecology resourcesยท2026
Same journal

Individual Identification of Prey in Carnivore Scats.

Molecular ecology resourcesยท2026
See all related articles

Related Experiment Video

Updated: May 24, 2026

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Q(ST) in a hierarchically structured population.

Michael C Whitlock1, Kimberly J Gilbert

  • 1Department of Zoology, University of British Columbia, 6270 University Blvd., Vancouver, BC V6T 1Z4, Canada. whitlock@zoology.ubc.ca

Molecular Ecology Resources
|February 17, 2012
PubMed
Summary
This summary is machine-generated.

Disentangling selection and drift requires comparing quantitative trait (Q(ST)) and neutral locus (F(ST)) variation. This study introduces a hierarchical Q(ST) method for analyzing spatial scales, improving evolutionary insights.

More Related Videos

Analysis of Side Population in Solid Tumor Cell Lines
06:26

Analysis of Side Population in Solid Tumor Cell Lines

Published on: February 23, 2021

Conditions Affecting Social Space in Drosophila melanogaster
08:04

Conditions Affecting Social Space in Drosophila melanogaster

Published on: November 5, 2015

Related Experiment Videos

Last Updated: May 24, 2026

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Analysis of Side Population in Solid Tumor Cell Lines
06:26

Analysis of Side Population in Solid Tumor Cell Lines

Published on: February 23, 2021

Conditions Affecting Social Space in Drosophila melanogaster
08:04

Conditions Affecting Social Space in Drosophila melanogaster

Published on: November 5, 2015

Area of Science:

  • Evolutionary biology
  • Population genetics

Background:

  • Selection and genetic drift are key evolutionary forces.
  • Comparing quantitative trait variation (Q(ST)) with neutral genetic variation (F(ST)) can distinguish between selection and drift.
  • Existing methods typically analyze these variations at a single spatial scale.

Purpose of the Study:

  • To develop a hierarchical Q(ST) method.
  • To enable the disentanglement of selection and drift across multiple spatial scales.

Main Methods:

  • Derivation of a hierarchical Q(ST) statistic.
  • Application across varying levels of spatial structure.

Main Results:

  • A novel hierarchical Q(ST) framework was developed.
  • This framework allows for the analysis of Q(ST) and F(ST) across nested spatial scales.

Conclusions:

  • The hierarchical Q(ST) provides a more comprehensive approach to studying the interplay of selection and drift.
  • This method enhances our ability to understand evolutionary processes in structured populations.