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Reliable wolf-dog hybrid detection in Europe using a reduced SNP panel developed for non-invasively collected samples
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Reliable wolf-dog hybrid detection in Europe using a reduced SNP panel developed for non-invasively collected samples
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Journal Article
Reliable wolf-dog hybrid detection in Europe using a reduced SNP panel developed for non-invasively collected samples
2021
Overview
Background
Understanding the processes that lead to hybridization of wolves and dogs is of scientific and management importance, particularly over large geographical scales, as wolves can disperse great distances. However, a method to efficiently detect hybrids in routine wolf monitoring is lacking. Microsatellites offer only limited resolution due to the low number of markers showing distinctive allele frequencies between wolves and dogs. Moreover, calibration across laboratories is time-consuming and costly. In this study, we selected a panel of 96 ancestry informative markers for wolves and dogs, derived from the Illumina CanineHD Whole-Genome BeadChip (174 K). We designed very short amplicons for genotyping on a microfluidic array, thus making the method suitable also for non-invasively collected samples.
Results
Genotypes based on 93 SNPs from wolves sampled throughout Europe, purebred and non-pedigree dogs, and suspected hybrids showed that the new panel accurately identifies parental individuals, first-generation hybrids and first-generation backcrosses to wolves, while second- and third-generation backcrosses to wolves were identified as advanced hybrids in almost all cases. Our results support the hybrid identity of suspect individuals and the non-hybrid status of individuals regarded as wolves. We also show the adequacy of these markers to assess hybridization at a European-wide scale and the importance of including samples from reference populations.
Conclusions
We showed that the proposed SNP panel is an efficient tool for detecting hybrids up to the third-generation backcrosses to wolves across Europe. Notably, the proposed genotyping method is suitable for a variety of samples, including non-invasive and museum samples, making this panel useful for wolf-dog hybrid assessments and wolf monitoring at both continental and different temporal scales.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Analysis
/ Animal Genetics and Genomics
/ Biomedical and Life Sciences
/ Canidae
/ Dogs
/ Genomes
/ Genomics
/ Hybrids
/ Identification and classification
/ Markers
/ Microbial Genetics and Genomics
/ Museums
/ Non-human and non-rodent vertebrate genomics
/ Single nucleotide polymorphisms
/ Single-nucleotide polymorphism
/ Success
/ Wolves
