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SEED STORAGE OF SOYBEAN ACCESSIONS AND THEIR LONGEVITY

Institution

Plant Production Institute nd. a. V.Ya. Yuriev of NAAS

Section

PLANT GENETIC RESOURCES CONSERVATION

Abstract

Goal. To determine optimal regimes for mid- and long-term seed storage of soybean seeds in the depository of the National Center for Plant Genetic Resources of Ukraine by monitoring of the seed germinability.Results and discussion. The gene pool seeds of 46 soybean (Glycine max (L.) Merr.) and three wild soybean (Glycine soja Sieb.& Zucc.) accessions from 14 countries, which were stored with a moisture content of 5-7 % in sealed containers at unregulated temperature, at 4°C for up to 17 years and, in some cases, at -20°C, were investigated. Seeds for long-term storage were grown in the Eastern and Southern Forest-Steppe of Ukraine in 1998-2004. The influence of the growing conditions (temperature and precipitation amount) on the longevity upon storage of seeds with controlled moisture content and at various temperatures was analyzed. The 10-year storage of soybean seeds grown in 1998-2004 with a moisture content of 5-7 % at 4°C in most cases had either no or positive effect on their germinability. The storage of seeds of the most of soybean accessions with the moisture content of 5 % in hermetically sealed containers, even under at unregulated temperature, allows the viability to be maintained unchanged for more than 10 years. After the storage at unregulated temperature with the seed moisture content of 7 %, the germinability was lower than that of seeds with the moisture content of 5%. The soybean seed longevity accessions did not exceed that of wild soybean seeds. No dependence of soybean seed longevity on a ripening group was notices. The germinability variation after the 10-year storage of seeds under these conditions was increased. Causes of possible changes in the seed germinability after the 10-year storage are discussed.Conclusions. The storage of soybean accession seeds with 5 % moisture content in sealed containers at 4°C, even at unregulated temperature, allows maintaining the germinability without any changes for 10 years and longer.

Keywords

soybean, seeds, gene pool, storage, longevity, temperature, moisture content, germination