期刊
MOLECULAR ECOLOGY
卷 27, 期 23, 页码 4711-4724出版社
WILEY
DOI: 10.1111/mec.14910
关键词
colony breeding system; genetic bottleneck; inbreeding; invasive species; sib-mating
资金
- KAKENHI [21247006, 23405011, 15H02652, 15H04425]
- Japan Society for the Promotion of Science [25221206]
- Texas AAMP
- M Endowment in Urban Entomology
- Grants-in-Aid for Scientific Research [23405011] Funding Source: KAKEN
Identifying traits that facilitate species introductions and successful invasions of ecosystems represents a key issue in ecology. Following their establishment into new environments, many non-native species exhibit phenotypic plasticity with post-introduction changes in behaviour, morphology or life history traits that allow them to overcome the presumed loss of genetic diversity resulting in inbreeding and reduced adaptive potential. Here, we present a unique strategy in the invasive ant Brachyponera chinensis (Emery), in which inbreeding tolerance is a pre-adapted trait for invasion success, allowing this ant to cope with genetic depletion following a genetic bottleneck. We report for the first time that inbreeding is not a consequence of the founder effect following introduction, but it is due to mating between sister queens and their brothers that pre-exists in native populations which may have helped it circumvent the cost of invasion. We show that a genetic bottleneck does not affect the genetic diversity or the level of heterozygosity within colonies and suggest that generations of sib-mating in native populations may have reduced inbreeding depression through purifying selection of deleterious alleles. This work highlights how a unique life history may pre-adapt some species for biological invasions.
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