Ryegrasses (Lolium sp.) and fescues (Festuca sp.) play a key role in many grass ecosystems, such as meadows and pastures. Moreover, they are widely used for forage production and as amenity grasses. The intergeneric hybrids called Festulolium possess agronomically beneficial characteristics from both parents and could reflect climatic changes in the near future. our article delivers new insights into the generics of these hybrids. and Štěpán Stočes, David Kopecký.