Особливості проведення експертизи сортів картоплі (Solanum tuberosum L.) на відмінність, однорідність та стабільність

The paper considers the methodical reguirements related to expertizing the new varieties as to the distinction, similarly and stability of potato variety. It is noteworthy that the identification of varieties is exercised through applying the methods of specifying morphological characters (qualitative, quantitative, pseudo-qualitative ones). The authors also specify the above characters and focus on their importance for the international harmonization variety descriptions by the International Union for protecting new crop varieties. The specifications of characters are grouped according to the documented levels of corresponding phonological phase of growth and development. The characters cited in the paper contribute to the completeness of the morphological specification according to the state registration of varieties and the rights to them are exercised.