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Updated: May 5, 2026

Development and Testing of Species-specific Quantitative PCR Assays for Environmental DNA Applications
Published on: November 5, 2020
Combining next-generation sequencing and online databases for microsatellite development in non-model organisms.
Ciro Rico1, Eric Normandeau, Anne-Marie Dion-Côté
11] Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (EBD, CSIC), C/Américo Vespucio s/n, 41092 Sevilla, Spain [2] School of Marine Studies, University of the South Pacific, Lower Laucala Campus, Suva, Fiji Islands [3] Institut de Biologie Intégrative et des Systèmes (IBIS), Département de Biologie, Université Laval, Pavillon Charles-Eugène-Marchand, Québec G1V 0A6, Canada.
Researchers developed 40 new microsatellite markers for whitefish evolution studies using next-generation sequencing data. These polymorphic markers aid in understanding adaptive radiation and demographic history in Coregonus species.
Area of Science:
- Ecology and evolutionary biology
- Genomics and bioinformatics
Background:
- Microsatellites are crucial polymorphic markers in ecological and evolutionary studies.
- Next-generation sequencing (NGS) and expressed sequence tag (EST) databases accelerate genetic marker discovery.
- Whitefishes (Coregonus spp.) present a valuable non-model system for studying adaptive radiation.
Purpose of the Study:
- To characterize microsatellites and optimize multiplex PCR reactions for whitefish (Coregonus spp.).
- To leverage existing transcriptome and EST data for genetic marker identification, avoiding de novo sequencing.
- To investigate the evolutionary and demographic history of whitefish populations.
Main Methods:
- Utilized transcriptome sequences from Illumina® and Roche-454 platforms, alongside public EST databases.
- Identified and characterized microsatellite loci.
- Optimized multiplex PCR assays for selected polymorphic loci.
- Validated marker utility with population genetics and phylogeographic analyses on 494 whitefish from five lakes and two ecotypes.
Main Results:
- Successfully identified and optimized 40 polymorphic microsatellite loci.
- Demonstrated the effectiveness of using existing sequence data for marker development.
- Validated the markers' robustness in population genetics and phylogeography.
Conclusions:
- Developed a robust set of microsatellite markers for Coregonus spp. using publicly available sequence data.
- The optimized multiplex panels provide efficient tools for future research on whitefish adaptive radiation and population structure.
- This approach highlights the utility of transcriptomic resources for non-model organisms.
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