Red Queen Revisited: Immune Gene Diversity and Parasite Load in the Asexual Poecilia Formosa Versus Its Sexual Host Species P. Mexicana

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2019 Jul 4

PMID 31269085

Citations 3

Authors

Fabian Gosser

Manfred Schartl

Francisco J Garcia-De Leon

Ralph Tollrian

Kathrin P Lampert

Affiliations

Soon will be listed here.

Abstract

In accordance with the Red Queen hypothesis, the lower genotypic diversity in clonally reproducing species should make them easier targets for pathogen infection, especially when closely related sexually reproducing species occur in close proximity. We analyzed two populations of clonal P. formosa and their sexual parental species P. mexicana by correlating individual parasite infection with overall and immune genotype. Our study revealed lower levels of overall genotypic diversity and marginally fewer MHC class I alleles in P. formosa individuals compared to sexually reproducing P. mexicana. Parasite load, however, differed only between field sites but not between species. We hypothesize that this might be due to slightly higher genotypic diversity in P. formosa at the innate immune system (toll like receptor 8) which is likely due to the species' hybrid origin. In consequence, it appears that clonal individuals do not necessarily suffer a disadvantage compared to sexual individuals when fighting parasite infection.

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