Improvement of the methodology for assessing breeding material of multi-tiered onion

Multi-tiered onion (Allium proliferum Schrad.) belongs to promising perennial spice-aromatic, vegetable and medicinal crops and can be successfully cultivated in the soil and climatic conditions of the Republic of Belarus. The purpose of the study was to improve the methodology for assessing the breeding material of multi-tiered onions according to a set of basic economically useful, morphological, morphometric and phenological traits. The objects of the study were foreign varieties and newly registered varieties of the Belarusian State Agricultural Academy (multi-tiered onion varieties Uzgorak and Pachastunak) included in the State Register of Varieties of Agricultural Plants of the Republic of Belarus. The main directions in the breeding of multi-tiered onions are: increasing productivity; developing forms adapted to industrial cultivation technology, with vigorous regrowth after cutting, winter-hardy, resistant to pests and diseases, with a high content of useful substances valuable for the general chemical and biochemical composition; and breeding varieties with different periods of reaching commercial maturity, adapted to cultivation in different soil and climatic conditions. As a result of joint research by the Belarusian State Agricultural Academy and the State Inspection for Testing and Protection of Plant Varieties, the methodology for conducting DUS tests (distinctness, uniformity and stability) of multi-tiered onion varieties has been improved, which makes it possible to optimize the selection process of this crop and to carry out a more thorough assessment of variety identification during state variety testing and when determining varietal purity in industrial plantings. The national methodology for conducting DUS tests of multi-tiered onion varieties provides breeders with an opportunity to pay attention to the relevant characteristics and distinctive features of multi-tiered onions, which will contribute to the effective conduct of further breeding work to create forms and varieties with various economically valuable properties, and to identify various varieties.

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