The effect of inbreeding rate on fitness, inbreeding depression and heterosis over a range of inbreeding coefficients
Pekkala, N., Knott, E., Kotiaho, J. S., Nissinen, K., & Puurtinen, M. (2014). The effect of inbreeding rate on fitness, inbreeding depression and heterosis over a range of inbreeding coefficients. Evolutionary Applications, 7(9), 1107-1119. https://doi.org/10.1111/eva.12145
Published inEvolutionary Applications
DisciplineEkologia ja evoluutiobiologiaKoulutuksen tutkimuslaitosBiologisten vuorovaikutusten huippututkimusyksikköMuseoEcology and Evolutionary BiologyFinnish Institute for Educational ResearchCentre of Excellence in Biological Interactions ResearchMuseum
© 2014 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Understanding the effects of inbreeding and genetic drift within populations and hybridization between genetically differentiated populations is important for many basic and applied questions in ecology and evolutionary biology. The magnitudes and even the directions of these effects can be influenced by various factors, especially by the current and historical population size (i.e. inbreeding rate). Using Drosophila littoralis as a model species, we studied the effect of inbreeding rate over a range of inbreeding levels on (i) mean fitness of a population (relative to that of an outbred control population), (ii) within‐population inbreeding depression (reduction in fitness of offspring from inbred versus random mating within a population) and (iii) heterosis (increase in fitness of offspring from interpopulation versus within‐population random mating). Inbreeding rate was manipulated by using three population sizes (2, 10 and 40), and fitness was measured as offspring survival and fecundity. Fast inbreeding (smaller effective population size) resulted in greater reduction in population mean fitness than slow inbreeding, when populations were compared over similar inbreeding coefficients. Correspondingly, populations with faster inbreeding expressed more heterosis upon interpopulation hybridization. Inbreeding depression within the populations did not have a clear relationship with either the rate or the level of inbreeding. ...
Dataset related to the publicationhttp://dx.doi.org/10.5061/dryad.10154
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Additional information about fundinghe research was funded by the Academy of Finland (Grant 7121616 to MP), the Centre of Excellence in Evolutionary Research, the Biological Interactions Graduate School and the Emil Aaltonen Foundation.
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