Yuemin Li

Profile

Project Title: Detecting signatures of selection in domesticated animals

Summary:  The domestication of animals has a remarkable impact on human history, which resulted in a major shift in human subsistence patterns. Animal species such as dogs, pigs, cattle, chickens, and horses have been considerably changed in both phenotype and genotype over the past 15,000 years. They have been subjected to novel selection pressure and have evolved genetic adaptations to the human niche. A relaxation of selection when animals left the wild environment and positive selection due to intentional and unintentional human preference can both lead to domestication traits. Identifying potential selection targets during and after domestication can provide new insights into the genetic basis underlying domestic traits and general mechanisms by which genetic variation shapes phenotypic diversity.

Meanwhile, with recent advances in ancient DNA techniques, it is feasible to derive both the time and the intensity of selection.

In this project, we aim to infer signatures of selection from population genomic data of both contemporary and ancient samples for several domestic species such as chickens, dogs, and cattle. We also intend to discern genes under selection during the domestication from genes affected by recent selective processes.

Supervisor:

• Dr Matteo Fumagalli

Research