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Invasive species that successfully establish, persist, and expand within an area of introduction, in spite of demographic bottlenecks that reduce their genetic diversity, represent a paradox. Bottlenecks should inhibit population growth and invasive expansion, as a decrease in genetic diversity should result in inbreeding depression, increased fixation of deleterious mutations by genetic drift (drift...
As a consequence of founder effects, inbreeding can hamper colonization success: First, in species with self‐incompatibility controlled by an S‐locus, inbreeding may decrease cross‐compatibility, mainly due to the sharing of identical S‐alleles between closely related mating partners. Secondly, inbreeding can reduce fitness of inbred relative to outbred offspring (i.e. inbreeding depression). Polyploids...
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