Gene Family Expansion and Contraction
The expansion or contraction of orthologous gene families was determined
using CAFE v 4.2 (De Bie et al., 2006). The program uses a birth and
death process to model gene gain and loss over phylogenic distance. Gene
families that had undergone expansion and/or contraction were calculated
using the phylogeny and divergence times with the parameters: p-value =
0.05, number of threads = 10, number of random = 1,000.