“…Previous genetic studies of F. excelsior have demonstrated heritability values above 0.4 (Enderle et al, 2015;Kjaer et al, 2012;Lobo et al, 2014Lobo et al, , 2015McKinney et al, 2011;Muñoz et al, 2016;Pliūra et al, 2011;Stener, 2013) and the polygenic nature of resistance to H. fraxineus (Muñoz et al, 2016;Stocks et al, 2019). Several studies have identified genetic markers that are associated with increased tolerance to ash dieback (Chaudhary et al, 2020;Harper et al, 2016;Havrdová et al, 2016;McKinney et al, 2014;Menkis et al, 2020;Sahraei et al, 2020;Sollars et al, 2017;Stocks et al, 2019). These markers can be potentially utilized to identify resistant trees that can serve as the foundation for a breeding program (Plumb et al, 2020).…”