Lolium multiflorum line inducing genome loss

A Lolium multiflorum diploid plant or parts thereof which segregates for levels of pollen sterility and where, upon using the Lolium as the maternal parent in an interspecific hybridization with a Festuca species being utilized as the paternal parent, confers to the resultant sterile F1 interspecific hybrids the ability to produce some seed via parthenogenesis that also possess a viable embryo, wherein said seeds which possess a viable embryo, may develop into F2 generation plants, wherein at least some of said F2 generation plants are dihaploid homozygous Festuca species comprising a karyotype exhibiting a balanced genome of Festuca chromosomes equivalent to the chromosome number of said Festuca paternal parent and no Lolium genomic chromosomes.