Selection of duplicates of flax accessions – an important task in the management of collection of genetic resources ofLinum usitatissimumL.

Summary Introduction The Institute of Natural Fibres and Medicinal Plants National Research Institute (IWNiRZ) – formerly Institute of Natural Fibres, together with Plant Breeding and Acclimatization Institute (IHAR) in Radzików carry out tasks related to the protection of genetic resources of flax ( Linum usitatissimum L.). Genetic resources of flax are stored as seeds in IHAR refrigeration chambers. The research material consisted of passport data of genetic resources of flax. Objective The aim of the presenting the identification of duplicates of accessions of flax in documentation of the National Center of Plant Genetic Resources (IHAR). This will facilitate the management of the collection of flax genetic resources. Removal of duplicate accessions from the collection of flax genetic resources will save storage space in long-term chambers, savings in storage costs, savings in working hours. Methods The working methods were studying the passport database and the institute’s gene bank documentation. Results In the cooling chambers of the seed bank at KCRZG at IHAR, unintentional duplicates are stored: 29 flax accessions with the same accessions number and 19 flax accessions with two different accession numbers. Conclusions The presentation in the article of two types of duplicates of flax accessions is very helpful in managing the collection of genetic resources of flax. Reducing the number of genotypes in the flax collection will facilitate the faster collection of all valorization data, which will be very helpful for users of the collection of genetic resources of flax.