Lolium multiflorum line inducing genome loss

A novel Lolium multiflorum diploid plant or parts thereof having ATCC deposit accession number PTA-10229, wherein said Lolium multiflorum diploid plant segregates for levels of pollen sterility, and wherein upon using said Lolium multiflorum diploid plant 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, and wherein said seeds which possess a viable embryo may develop into F2 generation plants, at least some of which 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 chromosomes.