What’s more, the turkeys on our dinner table this week have less genetic variation than both their wild counterparts and other domesticated animals, including pigs and chickens. The lack of variance can be explained by the way Americans like their turkeys–big and huge-breasted. Variation in genes that code for those traits can lead to more scraggly and therefore less appetizing turkeys. Rob Fleischer, head of the Smithsonian Conservation Biology Institute’s Center for Conservation and Evolutionary Genetics, said the team wanted to compare how domestic Thanksgiving turkeys compared with their ancestral wild brethren from southern Mexico. “Ancient turkeys weren’t your Butterball,” he said in a statement. To figure this out, SI scientists sequenced the full genomes of birds from seven different commercial turkey-breeding lines, as well as the genomes of three south Mexican turkeys collected in 1899. Those turkeys’ DNA was extracted at the National Zoo from samples stored in the Smithsonian’s collections. Fleischer said the museum specimens worked surprisingly well. This will help geneticists nail down the genes involved in turkey domestication and enfattening. Europeans apparently discovered turkeys in Mexico during the Spanish Conquest and brought them to Europe, where breeders created different varieties. Researchers say it’s important to know the differences between ancient and modern turkeys, just in case something happens to our very genetically non-diverse population. The new research is published in BMC Genomics.
