Intuitively f should be single-moded if incompatibilities accumulate gradually, leading to gradual reduction of the migration rate: if t0 is the inception of species separation and t1 is the time when gene flow has completely ceased, the density f should be >0 in the interval t0 < τ < t1 only.
This is because P2 females are more likely to be involved in incompatibility matings if a2 is low, whereas the fitness of P1 individuals stays the same.
What if the incompatibility runs deeper than that, to core values?
If the incompatibility statement is removed, there is no longer a theological or moral justification for denying ordination and marriage to LGBTQ persons.
If hybrid incompatibility arises as a by-product of adaptive evolution, the abundant resistance genes might lie hiding in genome as candidates for gene-flow barriers.
Property: if the incompatibility graph of a ternary matrix M contains an odd-length cycle, then M does not satisfy the SC1P.
Incompatibility does mean that the cluster of functional genotypes containing the ancestral state at the residue of interest and the functional network of genotypes containing the derived state have fewer connections than they might have if no incompatibility were present.
A case was defined as FNAIT if (1) incompatibility between maternal and paternal/fetal HPA type was confirmed and maternal anti-HPA antibodies were detected, (2) HPA-incompatibility between the mother and father was confirmed and the fetus/neonate suffered ICH and (3) anti-HPA antibodies were detected in the mother but data on fetal/paternal HPA genotype was missing.
Interestingly, premating isolation is most likely to evolve if levels of incompatibility are intermediate, if the infection causes fecundity reductions or Wolbachia transmission is incomplete.
Our results show that unidirectional CI is most likely to select for premating isolation if levels of incompatibility are intermediate, if the infection causes fecundity reductions or Wolbachia transmission is incomplete (see Text S5).
