Abstract

BOSCHI, Federico  and  IBARRA, Mariela. Analysis of the Distinctness, Uniformity and Stability (DUS) of new Cultivars of Potato (Solanum tuberosum L.) in Uruguay. Agrociencia Uruguay [online]. 2012, vol.16, n.2, pp.74-81. ISSN 1510-0839.

The National Seeds Institute (INASE) of Uruguay grants titles for new cultivars, following the guidelines of the International Union for the Protection of New Varieties of Plants (UPOV). A cultivar can be protected if it meets the requirement of being different, uniform and stable (DUS). The aim of this work was to determine whether 13 Solanum tuberosum L. cultivars were DUS so as to be eligible to be protected. The trials were conducted during the fall of 2008 and 2009 in San José, Uruguay. The experimental unit was 30 plants´ plots. The candidates to be protected were: ‘Apolline’, ‘Canberra’, ‘Colorado Rose’, ‘CP 97145.2’ (INIA Yaguarí) ‘Daifla’, ‘INIA Iporá’, ‘Kenita’, ‘Mountain Rose’, ‘Mozart’, ‘Purple Majesty’, ‘Red Magic’, ‘Sagita’ and ‘Voyager’. The study also included five cultivars of public use: ‘Atlantic’, ‘Cal White’, ‘Chieftain’ ‘Dark Red Norland’ y Romera’. We studied 32 morphological and phenological characteristics of plant, stem, leaf, leaflets, bud and tuber. The characteristics of the harvested tubers were analyzed in the laboratory and sprouting chamber. A varietal description was recorded for each cultivar. The characteristics that best differentiated the cultivars were: shape of tuber, flesh color (white, yellow, red and purple) and skin color (yellow, red and purple). The results indicate that the candidate cultivars are different from previously protected cultivars, and that they are homogeneous and stable. Therefore, the 13 cultivars studied meet the DUS requirements to obtain the Title Deed

Keywords : DUS TEST; SOLANUM TUBEROSUM L.; PROPERTY OF VARIETIES; SEEDS.

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