Proportional hazards model of how initial fertilization affects subsequent maternal fertility of Neurospora colonies.

The effects of the type of first fertilization (pseudo-fertilization, conspecific, allopatric heterospecific, sympatric heterospecific) and the geographic origin and strain identity of the initial fertilizing strain on subsequent fertility of the maternal colony were assessed by a proportional hazards model.1The model incorporates the type of initial fertilization (water negative control, conspecific, allopatric heterospecific, or sympatric heterospecific), the geographic origin of the initial fertilizing strain, and the strain identity of the initial fertilizing strain as nested effects.