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Table 1 Positive selection analysis among sites and lineages of viral cystatins from Cotesia spp. parasitoid wasps

From: Viral cystatin evolution and three-dimensional structure modelling: A case of directional selection acting on a viral protein involved in a host-parasitoid interaction

Site analysis       
Models χ2 value df P-value for best model Global ω ω > 1, parameters PSS
M0 versus M3 125.00 6 < 0.001 1.31 ω = 2.65, p = 0.310 26, 5*, 11**
M8A versus M8 19.57 1 < 0.001 1.21 ω = 2.85, p = 0.289 26, 7*, 5**
Branch site analysis       
Models χ2 value df P-value for best model   ω > 1, parameters (foreground lineage)  
M1a versus MA 126.81 2 < 0.01   ω = 11.93, p = 0.232  
M3 versus MB 73.20 3 < 0.01   ω = 12.04, p = 0.233  
  1. Notes: df is degrees of freedom; PSS is the number of positive selected sites; * corresponds to a posterior probability greater than 95% of having ω > 1 and ** corresponds to a posterior probability greater than 99% of having ω > 1.