Changes occurring in seed during aging are significant as far as seed quality and longevity are concerned and are a consequence of the effects of different storage conditions. The chemical composition of seed with high oil content is related to specific processes occurring in seed during storage. In this trial, sunflower and soybean genotypes developed in Novi Sad were submitted to accelerated aging for three and five days, and natural aging for six and twelve months, under controlled and conventional (non-controlled) conditions. The obtained results showed that preservation of seed viability depended on storage condition and duration, as well as plant species. Accelerated aging test can be used to predict the length of storage life of sunflower and soybean seed. In comparison to sunflower seed, soybean seed is more sensitive to damage and reduced germination during storage.
Seed aging and deterioration affect seed vigor and viability. The characteristics of the chemical composition of oil crops seed are related to specific processes occurring in the seed during storage. This study was performed to examine the changes in seed vigor of different sunflower and soybean genotypes under controlled and conventional (uncontrolled) conditions of natural aging for six and twelve months. Obtained results show that the degree of seed damage and the ability of seed to resist the negative effects of aging were influenced by duration and type of storage, as well as seed characteristics of the tested genotypes. The most valuable vigor test for both sunflower and soybean was cold test.
Annual legumes represent one of the basic elements of the agriculture of Serbia. Until recently, only annual forage legumes such as pea or vetches were autumn-sown in Serbia and other neighbouring regions of the continental Balkan Peninsula. During the last decade, the first crucial steps in the development of autumn-sown grain legumes were made, with emphasis on dry pea, faba bean and dual-purpose vetches. The winter forage pea cultivars developed in Serbia are generally characterised by prominent winter hardiness and a rather extended growing season, usually beginning with sowing in early October and ending either by cutting for forage production in late May or harvesting seeds in mid-July. One of the strategic advantages of recently released cultivars of autumn-sown dry pea is their significantly improved earliness. The Serbian winter dry pea cultivar Mraz, newly registered in Serbia and developed from hybrids between French and Serbian autumn-hardy materials, is regularly at least a week earlier than winter barley, so many farmers will not have to choose between pea and cereals due to limited harvesting resources. The initial material for pre-breeding autumn-sown faba bean in the conditions of Serbia consisted of both collected local landraces of Serbia and populations from France and Germany. The preliminary results of their agronomic performance showed that they have a great potential for high grain yield in the conditions of Serbia. Promising results in breeding winter hardy cultivars were achieved with several vetch species, as well as with lentil and grass pea, and will be continued with more species including Medicago truncatula.
Soybean time of flowering and maturity are genetically controlled by E genes. Different allelic combinations of these genes determine soybean adaptation to a specific latitude. The paper describes the first attempt to assess adaptation of soybean genotypes developed and realized at Institute of Field and Vegetable Crops, Novi Sad, Serbia [Novi Sad (NS) varieties and breeding lines] based on E gene variation, as well as to comparatively assess E gene variation in North-American (NA), Chinese, and European genotypes, as most of the studies published so far deal with North-American and Chinese cultivars and breeding material. Allelic variation and distribution of the major maturity genes (E1, E2, E3, and E4) has been determined in 445 genotypes from soybean collections of NA ancestral lines, Chinese germplasm, and European varieties, as well as NS varieties and breeding lines. The study showed that allelic combinations of E1–E4 genes significantly determined the adaptation of varieties to different geographical regions, although they have different impacts on maturity. In general, each collection had one major E genotype haplogroup, comprising over 50% of the lines. The exceptions were European varieties that had two predominant haplogroups and NA ancestral lines distributed almost evenly among several haplogroups. As e1-as/e2/E3/E4 was the most common genotype in NS population, present in the best-performing genotypes in terms of yield, this specific allele combination was proposed as the optimal combination for the environments of Central-Eastern Europe.
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