Daphnia parasite dynamics across multiple Caullerya epidemics indicate selection against common parasite genotypes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F16%3A43890718" target="_blank" >RIV/60076658:12310/16:43890718 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/16:10328647

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S0944200616300228" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0944200616300228</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.zool.2016.04.003" target="_blank" >10.1016/j.zool.2016.04.003</a>

Result language

angličtina

Original language name

Daphnia parasite dynamics across multiple Caullerya epidemics indicate selection against common parasite genotypes

Original language description

Studies of parasite population dynamics in natural systems are crucial for our understanding of host-parasite coevolutionary processes. Some field studies have reported that host genotype frequencies in natural populations change over time according to parasite-driven negative frequency -dependent selection. However, the temporal patterns of parasite genotypes have rarely been investigated. Moreover, parasite-driven negative frequency -dependent selection is contingent on the existence of genetic specificity between hosts and parasites. In the present study, the population dynamics and host-genotype specificity of the ichthyosporean Caullerya mesnili, a common endoparasite of Daphnia water fleas, were analysed based on the observed sequence variation in the first internal transcribed spacer (ITS1) of the ribosomal DNA. The Daphnia population of lake Greifensee (Switzerland) was sampled and subjected to parasite screening and host genotyping during C. mesnili epidemics of four consecutive years. The ITS1 of wild-caught C. mesnili-infected Daphnia was sequenced using the 454 pyrosequencing platform. The relative frequencies of C mesnili ITS1 sequences differed significantly among years: the most abundant C. mesnili ITS1 sequence decreased and rare sequences increased over the course of the study, a pattern consistent with negative frequency -dependent selection. However, only a weak signal of host -genotype specificity between C mesnili and Daphnia genotypes was detected. Use of cutting edge genomic techniques will allow further investigation of the underlying micro-evolutionary relationships within the Daphnia-C. mesnili system. (C) 2016 The Authors. Published by Elsevier GmbH.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EG - Zoology

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Zoology

ISSN

0944-2006

e-ISSN

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Volume of the periodical

119

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

314-321

UT code for WoS article

000384958500010

EID of the result in the Scopus database

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