What specific biological function showed distinct genetic signatures of local selection in Southern Hoiho subspecies?
Cilium function in clearing the respiratory tract.
Genomic scans comparing the populations provided molecular clues explaining the Southern chicks' resistance to clinical RDS despite carrying the YPGV. The Southern subspecies exhibited distinct genetic signatures indicative of local selection acting upon regions of the genome associated with cilium function. Cilia are the microscopic, hair-like structures lining the respiratory tract, responsible for sweeping pathogens and debris away. The localized optimization of these structures in the Southern groups suggests they possess superior mechanical or biochemical means of clearing the virus or mitigating its pathogenic effects within the airways, providing a direct, physical defense mechanism against the disease.
