Table S2. Effects of genetic similarity on female fertility (pregnant yes/no), restricting the analyses to only warmblood mares (N=173). from Major histocompatibility complex-linked social signalling affects female fertility

Likelihood ratio tests comparing GLMMs and GLMs with genetic markers (fixed factors) and/or stallion identity (“ID”, random factor) and reference models (indicated in italics) to test the effects of (A) MHC antigen sharing (“MHC”, yes/no), and (B) pairwise genetic relatedness “r” based on 20 polymorphic microsatellite loci. (C) Direct comparison of effects of MHC and r in the subsample of 113 mares that allow for such a test. Significant p-values are emphasized in bold.