5.1 Mapping introgression during invasion: new motivations, new
tools
Hybridization within and between species has long been recognised as a
potentially important process mediating invasion success (Bock et al.,
2015). However, in part because of the increasing use of genomic data,
there is now a much greater appreciation of the true extent of intra-
and interspecific hybridization during invasions. Hybridization has
become a central part of invasion genetics (Grabenstein & Taylor, 2018;
McFarlane & Pemberton, 2019; Todesco et al., 2016; Viard, Riginos, &
Bierne, 2020). For example, newly updated models of the expected spatial
distribution of introgression following invasive hybridization can be
used to reconstruct invasion routes (QuilodrĂ¡n, Tsoupas, & Currat,
2020). There are a wealth of different strategies for detecting
introgression (Malinsky, 2019), and adaptive introgression in
particular, that to date have not been applied to invasive species
(Gower, Picazo, Fumagalli, & Racimo, 2020; Malinsky, 2019; Setter et
al., 2020; Svedberg, Shchur, Reinman, Nielsen, & Corbett-Detig, 2020).