Vegetation period of genetic resources of flax ( Linum usitatissimum L.)

Water Stress and Seed Color Interacting to Impact Seed and Oil Yield, Protein, Mucilage, and Secoisolariciresinol Diglucoside Content in Cultivated Flax (Linum usitatissimum L.)

Flaxseed (Linum usitatissimum L.) is a plant with a wide range of medicinal, health, nutritional, and industrial uses. This study assessed the genetic potential of yellow and brown seeds in thirty F4 families under different water conditions concerning seed yield, oil, protein, fiber, mucilage, and lignans content. Water stress negatively affected seed and oil yield, while it positively affected mucilage, protein, lignans, and fiber content. The total mean comparison showed that under normal moisture conditions, seed yield (209.87 g/m²) and most quality traits, including oil (30.97%), secoisolariciresinol diglucoside (13.89 mg/g), amino acids such as arginine (1.17%) and histidine (1.95%), and mucilage (9.57 g/100 g) were higher in yellow-seeded genotypes than the brown ones ((188.78 g/m²), (30.10%), (11.66 mg/g), (0.62%), (1.87%), and (9.35 g/100 g), respectively). Under water stress conditions, brown-seeded genotypes had a higher amount of fiber (16.74%), seed yield (140.04 g/m²), protein (239.02 mg. g^-1), methionine (5.04%), and secondary metabolites such as secoisolariciresinol diglucoside (17.09 mg/g), while their amounts in families with yellow seeds were 14.79%, 117.33 g/m², 217.12 mg. g^-1, 4.34%, and 13.98 mg/g, respectively. Based on the intended food goals, different seed color genotypes may be appropriate for cultivation under different moisture environments.

Selection of duplicates of flax accessions – an important task in the management of collection of genetic resources of Linum usitatissimum L

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.