Founder effects on trans-generational dynamics of closed inbreeding lineages of the predatory mite Phytoseiulus persimilis

Author(s)
Demet Çekin, Peter Schausberger
Abstract

Both close inbreeding and distant outbreeding may reduce fitness below the level of individuals with intermediate parental relatedness. In the haplodiploid plant-inhabiting predatory mite Phytoseiulus persimilis, which is patchily distributed within and among host plants, fitness is indeed reduced in the short term, i.e. by a single generation of inbreeding. However, in the medium to long term (multiple generations), distant out-breeding should provide for favorable demographic founder effects in isolated populations. We tested this prediction in isolated experimental lineages founded by females mated to a sibling (close inbreeding), a male from the same population (intermediate relatedness) or a male from another population (distant outbreeding) and monitored lineage growth and persistence over four generations. Cross-generationally, lineages founded by distantly outbred females performed the best, i.e. produced the most descendants. However, this was solely due to superior performance from the F

2

generation onwards, whereas in the F

1

generation, lineages founded by females mated to males from their own population (intermediate relatedness) performed the best, as predicted from short-term in- and out-breeding depression effects. At the genetic level, this result was most likely due to distantly outbred founders introducing higher allelic variability and lower homozygosity levels, counterbalancing inbreeding depression, which inevitably occurs in isolated lineages, from the F

2

generation onwards.

Organisation(s)
External organisation(s)
Universität für Bodenkultur Wien
Journal
PLoS ONE
Volume
14
ISSN
1932-6203
DOI
https://doi.org/10.1371/journal.pone.0215360
Publication date
04-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
106051 Behavioural biology
ASJC Scopus subject areas
Biochemistry, Genetics and Molecular Biology(all), Agricultural and Biological Sciences(all)
Portal url
https://ucris.univie.ac.at/portal/en/publications/founder-effects-on-transgenerational-dynamics-of-closed-inbreeding-lineages-of-the-predatory-mite-phytoseiulus-persimilis(0af37fd2-a41a-4c6e-ba13-09743ede77c5).html