Resumo

LIZARAZO PENA, Pedro Alfonso; MORENO FONSECA, Liz Patricia  e  NUSTEZ LOPEZ, Carlos Eduardo. Yield and postharvest quality of potato cultivars of the Phureja Group in contrasting environments by altitude of the central Andean region of Colombia. Cienc. Tecnol. Agropecuaria [online]. 2022, vol.23, n.2, e2197.  Epub 31-Abr-2022. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol23_num2_art:2197.

Colombia has an important diversity of diploid potatoes genotypes (Solanum tuberosum, Phureja Group) cultivated in a wide altitudinal range. The goal of this research was to evaluate the effect of planting altitude in terms of yield and postharvest quality on improved potato cultivars of the Phureja Group. A complete factorial arrangement on generalized blocks was used. The first factor was the cultivar (Criolla Colombia, Criolla Dorada, Criolla Ocarina, Paola y Violeta), and the second one the locality with contrasting altitudes (3200, 2700 y 2300 m a.s.l.). Examined productivity variables were yield, percentage by commercial category and number of tubers, while the quality variables were specific gravity, response to frying and, for the violet cultivar, tuber pigmentation. Significant differences were found in all the variables evaluated, due to the interaction between locality and cultivar. Criolla Dorada was the most stable cultivar in yield between locations. In the lower locality, the productivity of the cultivars Criolla Ocarina, Paola and Violeta was affected, in contrast to localities with higher altitude, where the yield and percentage of "first category" potato was enhanced in all cultivars. Altitude enhanced the number of tubers per site in Criolla Ocarina, specific gravity in Criolla Dorada and pigmentation in Violeta tubers, but negatively affected frying in all cultivars. Considering that planting altitude affected all the variables evaluated with differences by cultivar, this interaction should be considered when establishing potato cultivars of the Phureja group.

Palavras-chave : diploid potato; environmental air temperature; genotype environment interaction; potato productivity; quality for industrial use; temperature gradients.

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