The evaluation of pre-breeding material of perennial ryegrass – PPP for Lolium perenne L. Project leader Sarmīte Rancāne Team of project Aldis Jansons Vija Stesele Aija Rebāne Ivo Vēzis Gaļina Jermuša Duration 2019 - 2024 Research focus 2. Preservation of biological diversity in agro- and forest biocenoses, ecosystem protection and services Source of funding Ministry of Agriculture projects Description of project The aim of research The aim of research - in the framework of the international Nordic-Baltic grass breeders' cooperation project "PPP for Pre-breeding in Perennial Ryegrass (Lolium perenne L.)" to improve, evaluate and select the genetic material of ryegrass with special adaptation capabilities in future climatic conditions for the creation of new varieties in the Nordic-Baltic region. The tasks of project: To evaluate and improve the breeding material of Lperenne of different geographical origin in two locations in Latvia under different soil and climatic conditions in order to create particularly plastic pasture ryegrass populations for the development of new varieties in the futureTo obtain detailed information by phenotyping and ploidy determination of 750 pasture ryegrass tetraploids, which were established at the Lithuanian Agricultural and Forest Research Centre Results Rancāne S., Ruņģis D. E., Kreišmane D., Vēzis I., Rebāne A., Jansons A. (2021). Assessment of Lolium perenne tetraploid clones produced from a diverse diploid breeding population. Zemdirbyste-Agriculture, 108 (1): 35–42.; Rongli O. A., Aavola R., Aleliūnas A., Asp T., Brazauskas G., Gylstrøm K. H., Helgadottir A., Isolahti M., Kovi M. R., Kristjánsdóttir A., Larsen A.S., Marum P., Paina C., Persson C., Rancãne S. (2018). Utilization of genebank accessions to improve northern adaptation of perennial ryegrass. G. Brazauskas et al. (eds.): Breeding Grasses and Protein Crops in the Era of Genomics. Springer, p. 3–8.