DOI: 10.1101/472084Nov 16, 2018Paper

Genomic analysis of dingoes identifies genomic regions under reversible selection during domestication and feralization

BioRxiv : the Preprint Server for Biology
Shao-jie ZhangYa-Ping Zhang

Abstract

Dingoes (Canis dingo) are wild canids living in Australia. They have lived isolated from both the wild and the domestic ancestor and are a unique model for studying feralization, the process in which a domestic species escapes human control, adapts to the wild, and diverges from the domestic ancestor into a genetically distinct population. Here, we sequenced the genomes of 10 dingoes and 2 New Guinea Singing Dogs, to study the origins and feralization process of the dingo. Phylogenetic and demographic analyses show that dingoes originate from domestic dogs in southern East Asia, which migrated via Island Southeast Asia to reach Australia 4300-5000 years ago, and subsequently diverged into a genetically distinct population. Selection analysis identified 99 positively selected genes enriched in starch and fat metabolism pathways, indicating a diet change during feralization of dingoes. Interestingly, we found that 14 genes have shifted allele frequencies compared to dogs but not compared to wolves. This suggests that the selection affecting these genes during domestication of the wolf was reversed in the feralization process. One of these genes, ARHGEF7, may promote the formation of neural spine and synapses in hippocampal neuron...Continue Reading

Related Concepts

Alleles
Demographic Analysis
Diet
Canis familiaris
Environment
Genes
Genome
Hippocampus (Brain)
Metabolism
Reproduction

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