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Rabbit genome analysis reveals a polygenic basis for phenotypic change during domestication
Miguel Carneiro1, Carl-Johan Rubin2, Federica Di Palma3,4
1CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Universidade do Porto, 4485-661, Vairão, Portugal.
Science (New York, N.Y.)
|August 30, 2014
Summary
Domestication genetics are complex. Rabbit genome analysis reveals many genetic changes, particularly in brain development genes, suggesting tame behavior evolved through numerous small genetic shifts, not just a few key genes.
Area of Science:
- Genomics
- Evolutionary biology
- Animal domestication
Background:
- The genetic basis of animal domestication, especially early evolutionary steps, remains largely unknown.
- Understanding domestication requires detailed genetic analysis of wild and domestic populations.
Purpose of the Study:
- To investigate the genetic architecture underlying rabbit domestication.
- To identify specific genetic regions and genes influenced by domestication.
Main Methods:
- Generation of a high-quality rabbit reference genome.
- Comparative resequencing of wild and domestic rabbit populations.
- Identification and analysis of selective sweeps and single-nucleotide polymorphisms (SNPs).
Main Results:
- Over 100 selective sweeps specific to domestic rabbits were identified.
- A limited number of fixed derived-allele single-nucleotide polymorphisms (SNPs) were found.
- SNPs with significant allele frequency differences were enriched in conserved noncoding regions.
- Genes associated with brain and neuronal development showed enrichment.
Conclusions:
- Rabbit domestication involved shifts in allele frequencies across numerous genetic loci.
- Complex genetic backgrounds, rather than single major genes, likely underlie the evolution of tame behavior in domestic animals.
- Conserved noncoding sites may play a significant role in domestication processes.
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