Related Experiment Video
Updated: Dec 23, 2025
07:40
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
Published on: March 13, 2011
21.3K
Canadian polar bear population structure using genome-wide markers
Evelyn L Jensen1,2, Christina Tschritter1, Peter V C de Groot1
1Department of Biology Queen's University Kingston ON Canada.
Ecology and Evolution
|April 22, 2020
Summary
Researchers studied polar bear genetics in Canada using genome-wide single nucleotide polymorphisms (SNPs). The findings reveal three distinct genetic clusters, providing a baseline for monitoring population structure amid environmental changes.
Area of Science:
- Conservation genetics
- Population genomics
- Wildlife biology
Background:
- Understanding species' responses to environmental change is crucial.
- Quantifying genetic diversity and its drivers is essential for predicting impacts.
Purpose of the Study:
- To generate baseline genetic data for Canadian polar bear subpopulations.
- To identify population structure using genome-wide markers.
- To establish a foundation for future monitoring and conservation efforts.
Main Methods:
- Analysis of 13,488 genome-wide single nucleotide polymorphisms (SNPs).
- Utilized double-digest restriction site-associated DNA sequencing (ddRAD) for genetic profiling.
- Sampled 358 individuals across Canadian polar bear subpopulations.
Main Results:
- Identified three distinct genetic clusters within the sampled Canadian polar bear range.
- Results were congruent with previous microsatellite-based studies.
- Could not confirm a unique cluster in the Norwegian Bay subpopulation due to sampling limitations.
Conclusions:
- The SNP data provide a critical baseline for assessing future changes in polar bear population structure.
- This genetic information can inform conservation strategies for polar bears.
- Opens possibilities for developing noninvasive monitoring tools.
Related Concept Videos
02:04Conservation of Small Populations
16.5K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
16.5K
02:54Evolutionary Relationships through Genome Comparisons
6.8K
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...
6.8K
01:25What is Population Genetics?
64.2K
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.
64.2K