Simulating the extinction of parental lineages from introgressive hybridization: the effects of fitness, initial proportions of parental taxa, and mate choice

摘要: Genomic introgression among divergent taxa following human-mediated secondary contact is a growing concern for the management and conservation of aquatic biodiversity. We simulated composition admixture hybridization by independently altering three variables: (1) initial proportion parental contact; (2) fitness gradients introgressant taxa; and, (3) strength assortative mating these taxa. Ultimately, we established that will trend toward extinction as proceeds in spite even heavy penalty hybrids. Also, number generations required (rate) to reach an arbitrarily determined threshold (< 5.0%) was inversely related relative derivative hybridized lineages. Moreover, rates depended on proportions with rare going extinct more rapidly than abundant Finally, (as evolved or reinforced mechanism pre-mating isolation) affect rate extinction. Introgressive hybridization, therefore, emerges important risk structural biodiversity wherever divergent, yet reproductively compatible, come together naturally are brought through human activities.