Intergenomic Interactions in Hybrids Between Short-Lived and Long-Lived Lines of a Seed Beetle: Analyses of Life History Traits
2015
Тип документа:
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт:
Products and regulatory motifs of the mitochondrial and nuclear genomes
interact closely to enable efficient cellular energy production within
mitochondria. Although recent evidences support the prediction that
during evolutionary time combinations of these interactions are
optimized by selection acting on important life history traits,
relatively few studies have directly tested it. The goal of this study
was to test the role of mitonuclear interactions in shaping preadult and
adult life history traits under age-specific selection in the seed
beetle (Acanthoscelides obtectus). In order to disentangle the effects
of mitochondria, nuclei and their interaction in the evolutionary
response to the long-term laboratory selection for early (E) and late
(L) reproduction, we used mitonuclear introgression lines in which E and
L mitochondrial genomes were expressed in both E and L nuclear
background. We found that mitonuclear genotypes carrying disrupted pair
of nuclear and mitochondrial genomes mainly affected preadult life
history traits-egg-to-adult viability and developmental time. Neither
mitochondria nor their interaction with nuclear genomes had effects on
realized fecundity of mated females and longevity of virgin beetles.
However, when involved in reproductive activities females and males with
disrupted genotypes mostly exhibited reduced longevity. Furthermore,
since reproduced males exhibited greater longevity cost than females,
our results are in accordance with the mother's curse hypothesis. Being
that for the most life history traits we detected smaller additive
mitochondrial genetic effects compared with epistatic mitonuclear
effects, we concluded that mitonuclear interactions might be the target
of age-specific selection.
Кључне речи:
Age-specific selection; Coevolution; Longevity; Life history traits; Mitochondria; Mitonuclear interactionИзвор:
Evolutionary Biology, 2015, 42, 4, 461-472
DOI: 10.1007/s11692-015-9340-9
ISSN: 1934-2845