Related Experiment Videos
Artifactual variation in randomly amplified polymorphic DNA banding patterns
D L Ellsworth1, K D Rittenhouse, R L Honeycutt
1Department of Wildlife & Fisheries Sciences, Texas A&M University, College Station 77843.
Abstract:
Randomly amplified polymorphic DNA (RAPD) and arbitrarily primed PCR (AP-PCR) represent novel DNA polymorphism assays that involve the amplification of random DNA segments using PCR and oligonucleotide primers of arbitrary sequence. Products defining the polymorphisms exhibit Mendelian inheritance and thus possess tremendous potential utility as genetic markers in a diverse array of scientific disciplines. Amplification profiles for specific oligonucleotide primers are highly dependent on the specific conditions of the reaction; banding patterns may thus vary extensively because of inconsistencies in a number of reaction parameters. Artifactual variation represents a potential problem in surveys of genetic variation in natural populations and must be discriminated from true polymorphism for the applications of RAPD to be both accurate and reliable.
Insights
Randomly amplified polymorphic DNA (RAPD) assays use PCR to detect DNA variations, offering potential as genetic markers. However, reaction inconsistencies can create artifactual data, requiring careful discrimination from true genetic polymorphism for reliable population studies.
Area of Science:
- Molecular Biology
- Genetics
- Population Genetics
Background:
- Randomly amplified polymorphic DNA (RAPD) and arbitrarily primed PCR (AP-PCR) are DNA polymorphism detection methods.
- These techniques utilize PCR to amplify random DNA segments with arbitrary oligonucleotide primers.
- The resulting DNA polymorphisms show Mendelian inheritance, indicating their utility as genetic markers.
Purpose of the Study:
- To introduce and describe Randomly Amplified Polymorphic DNA (RAPD) and Arbitrarily Primed PCR (AP-PCR) as novel DNA polymorphism assays.
- To highlight the potential of these assays as genetic markers across various scientific fields.
- To address the challenges and limitations associated with these techniques, particularly concerning data reliability.
Main Methods:
- Employing PCR to amplify random DNA segments using oligonucleotide primers of arbitrary sequences.
- Analyzing the amplification products to identify DNA polymorphisms.
- Investigating the inheritance patterns of detected polymorphisms.
Main Results:
- RAPD and AP-PCR assays generate DNA fragments that exhibit Mendelian inheritance.
- These polymorphisms have significant potential for application as genetic markers.
- Amplification profiles are sensitive to reaction conditions, leading to potential inconsistencies.
Conclusions:
- RAPD and AP-PCR are valuable tools for detecting DNA polymorphisms with potential as genetic markers.
- The reliability of these assays depends on controlling reaction parameters to avoid artifactual variation.
- Careful discrimination between true polymorphism and artifacts is crucial for accurate genetic studies in natural populations.