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).