Antagonistic pleitropy may help population-level selection in maintaining genetic polymorphism for transmission rate in a model phytopathogenic fungus

Article Abstract:

A metapopulation model is used to examine whether antagonistic pleiotropy could help maintain polymorphism involving common deleterious alleles in the phytopathogenic fungus Microbotryum violeceum. A competitive advantage for strains carrying the sex-linked deleterious alleles is not found to facilitate their maintenance as competitive situations were too rare, while in contrast, higher spore production did facilitate the maintenance of the deleterious alleles at low intra-tetrad mating rates and with a large advantage for spore production.

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Understanding the phylogeographic patterns of European hedgehogs, Erinaceus concolor and E. europaeus using the MHC

Article Abstract:

The phylogeographic patterns in the hedgehog are determined using two loci of the major histocompatibility complex (MHC), isolated for the first time in hedgehogs. These genes show long persistence times and high polymorphism in many species due to the actions of balancing selection.

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Dispersal of the Ponto-Caspian amphipod Echinogammarus ischnus: invasion waves from the pleistocene to the present

Article Abstract:

The geographical range of the amphipod Echinogammarus ischnus has expanded from the Ponto-Caspian region to Western Europe and North America. The phylogeographic patterns of this amphipod across its current distribution based on the nucleotide diversity is explored.

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