2. Articole

Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/13419

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    Induction of artificial mutations in Linum Usitatissimum L. by exposing seeds to different doses of X-rays [Articol]
    (Editura USM, 2025) Cuțitaru, Doina; Brindza, Ján
    The artificial induction of mutations represents an effective method for generating new sources of germplasm, which are essential in plant breeding. In the present study, induced mutagenesis was applied to flax by exposure to X-rays. As biological material, three flax (Linum usitatissimum L.) genotypes were selected: Kaufmann and Blaringhem (oilseed flax), and Belinka (fiber flax). Seeds were irradiated with X-rays at three doses: 500, 700, and 900 Gy, using the RS-2400-Q installation. The treatment led to a significant reduction in plant viability, especially for the Blaringhem and Belinka genotypes, which were completely eliminated within the first 24–33 days. In the case of the Kaufmann genotype, the survival rate at the 500 Gy dose was only 0.7%, also indicating high sensitivity to irradiation. However, plant mortality during various developmental stages was also influenced by environmental stress factors (hydrological drought, high temperatures). Analysis of the M₀ generation descendants revealed significant morphological changes compared to the control: increased number of branches, flowers, and fruits, but a pronounced reduction in seed mass and quality. The M₀ descendants exhibited an imbalance between vegetative and reproductive growth.
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    Storage potential of flax (Linum usitatissimum l.) samples - an indicator of seed longevity during ex situ conservation
    (CEP USM, 2024) Corlateanu, Liudmila; Мihaila, Victoria; Ganea, Anatolie; Сutitaru, Doina
    The article examines the effectiveness of the accelerated seed aging method for assessing the storage potential of flax samples for ex situ conservation in active genetic bank collections. The use of this method, which involves incubation of seeds at high temperature and humidity, allows the effects of unfavourable environmental factors to be adequately modelled and their influence on seed stability to be predicted. Various morphophysiological and biochemical parameters were used to determine the storage potential of seeds in order to predict their successful storage in the plant genome bank. Flax samples with high storage potential were identified. The data obtained indicate that the accelerated seed aging test allows the evaluation of differences in resistance between different varieties of important crop species.