Evidence of opposing fitness effects of parental heterozygosity and relatedness in a critically endangered marine turtle?

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dc.contributor.author Phillips, Karl P.
dc.contributor.author Jorgensen, T. H.
dc.contributor.author Jolliffe, K. G.
dc.contributor.author Richardson, D. S.
dc.date.accessioned 2017-09-12T14:00:42Z
dc.date.available 2017-09-12T14:00:42Z
dc.date.issued 2017-08-28
dc.identifier.citation Phillips, K. P., Jorgensen, T. H., Jolliffe, K. G. and Richardson, D. S. (2017) 'Evidence of opposing fitness effects of parental heterozygosity and relatedness in a critically endangered marine turtle?', Journal of Evolutionary Biology, 30(11), pp. 1953-1965. doi: 10.1111/jeb.13152 en
dc.identifier.volume 30
dc.identifier.issued 11
dc.identifier.startpage 1953
dc.identifier.endpage 1965
dc.identifier.issn 1010-061X
dc.identifier.issn 1420-9101
dc.identifier.uri http://hdl.handle.net/10468/4690
dc.identifier.doi 10.1111/jeb.13152
dc.description.abstract How individual genetic variability relates to fitness is important in understanding evolution and the processes affecting populations of conservation concern. Heterozygosity–fitness correlations (HFCs) have been widely used to study this link in wild populations, where key parameters that affect both variability and fitness, such as inbreeding, can be difficult to measure. We used estimates of parental heterozygosity and genetic similarity (‘relatedness’) derived from 32 microsatellite markers to explore the relationship between genetic variability and fitness in a population of the critically endangered hawksbill turtle, Eretmochelys imbricata. We found no effect of maternal MLH (multilocus heterozygosity) on clutch size or egg success rate, and no single-locus effects. However, we found effects of paternal MLH and parental relatedness on egg success rate that interacted in a way that may result in both positive and negative effects of genetic variability. Multicollinearity in these tests was within safe limits, and null simulations suggested that the effect was not an artefact of using paternal genotypes reconstructed from large samples of offspring. Our results could imply a tension between inbreeding and outbreeding depression in this system, which is biologically feasible in turtles: female-biased natal philopatry may elevate inbreeding risk and local adaptation, and both processes may be disrupted by male-biased dispersal. Although this conclusion should be treated with caution due to a lack of significant identity disequilibrium, our study shows the importance of considering both positive and negative effects when assessing how variation in genetic variability affects fitness in wild systems. en
dc.description.sponsorship University of East Anglia (UEA Dean of Science Studentship); University of Sheffield (NERC Biomolecular Analysis Facility Grant) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Wiley en
dc.rights © 2017 European Society for Evolutionary Biology. This is the peer reviewed version of the following article: Phillips, K. P. et al (2017), Evidence of opposing fitness effects of parental heterozygosity and relatedness in a critically endangered marine turtle?, Journal of Evolutionary Biology, 30(11), pp. 1953-1965, which has been published in final form at http://dx.doi.org/10.1111/jeb.13152. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. en
dc.subject Eretmochelys imbricata en
dc.subject Hawksbill turtle en
dc.subject Heterozygosity–fitness correlations en
dc.subject Inbreeding depression en
dc.subject Microsatellites en
dc.subject Negative heterozygosity–fitness correlations en
dc.subject Outbreeding depression en
dc.subject Conserved microsatellites en
dc.title Evidence of opposing fitness effects of parental heterozygosity and relatedness in a critically endangered marine turtle? en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Karl P. Phillips, School of Biological Earth & Environmental Sciences, University College Cork, + 323 21 490 3000; E: karl.phillips@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2018-08-28
dc.description.version Accepted Version en
dc.contributor.funder University of East Anglia en
dc.contributor.funder University of Sheffield en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Evolutionary Biology en
dc.internal.IRISemailaddress karl.phillips@ucc.ie

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