Genetic History of Galapagos Dogs

There have been free-living dogs on the Galapagos Islands since at least the 1830s, despite efforts toi control the populations. This study found that these dogs have a complex history of mixing with purebred dogs. A genomic analysis of Galápagos Islands dogs reveals distinct ancestral backgrounds between historical and modern populations. Modern dogs show recent mixing with three clades of purebred dogs, the Mastiffs. Asian spitz breeds, and sporting dogs (retrievers, pointers, and spaniels). Surprisingly, despite the population control efforts, no genetic bottlenecks were detected, indicating ineffective management strategies. Analysis of historical dogs indicates a srong ancestral link to shepherd breeds, especially the German Shepherd. The study highlights the need for more effective conservation strategies for protection of the unique genetic plant and animal diversity on the islands.



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