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Cultivos Tropicales

versión impresa ISSN 0258-5936

Resumen

CASTILLO, Juan G et al. Evaluation of a representative sample from cuban potato (Solanum tuberosum L.) germplasm for tuber quality. cultrop [online]. 2013, vol.34, n.2, pp.46-51. ISSN 0258-5936.

Developing new potato varieties with a higher tuber quality is at present, the most important challenge to the cuban breeding program. On this sense, it is necessary to make an exhaustive evaluation to the main characters that can be affect this relevant attribute. So, the objective of this work was focusing to carry out an evaluation to a several potato varieties, representative from the cuban potato germplasm, for tuber quality properties to be used as parents in the potato breeding program. Seventy potato cultivated accessions from the cuban germplasm bank were used. Several quality tuber characters were evaluated: specific gravity, dry matter, reduced sugar, starch, tuber average weight, equatorial and long tuber diameter and sensorial evaluation. Media, standard deviation, minimum and maximum values and coefficient of variation were estimated. A Principal Components Analyses, by means a biplot representation, to known accessions clusters and selects it according its behaviour for tuber quality was used. A good behaviour for tuber quality were found in the collection (22,9 %). Values of dry matter content and starch content were higher to 19 and 12 %, respectively and sugar reducer content was very low (> 0,5 %). All the varieties could be used as parent in a breeding program to obtain new varieties for industrial processing or directly on the different production systems. Atlantic, Bellini, Cal White, Derby, Maranca, Romano, Santana and Slaney and the new cubans clons; 1-10-96, 2-31-95, 4-6-93 and 9-32-93 were the most remarkable genotypes.

Palabras clave : potato; quality; selection; varieties.

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