Abstract

SALOMON, J. L et al. Evaluation of genotypes of potato (Solanum tuberosum L.) for reproductive and agronomic characters. cultrop [online]. 2010, vol.31, n.2, pp. 00-00. ISSN 0258-5936.

^{A study on reproductive and agronomic characters was conducted in 1005 genotypes from a different origin -870 clones of the National Potato Breeding Program and 135 foreign commercial varieties of certified category- at the National Institute of Agricultural Sciences (INCA) for two seasons (2004-2005 and 2005-2006). The following reproductive and agronomic characters were evaluated: flower color, skin color, flesh color, tuber shape, yield and tuber number. The occurrence of Alternaria solani and Streptomyces scabies was recorded by degree scales. The statistics of position and dispersion as well as confidence intervals were calculated for quantitative characters; Chi-square test was employed to compare proportions for the qualitative characters. The minimum, maximum and medium values of both disease occurrences were determined. A low number of 113 genotypes flowered and formed fruits within the two years studied. On the other hand, flowering ranged over a relatively short period between 28 and 38 days. With regard to flower color, there were white, purple and red flowers. Concerning tuber skin color, 84 % genotypes were yellow, 11 genotypes (10 %) were pink and seven individuals (6 %) were red. For tuber shape, genotypes with round tubers did not differ from the oval ones, reaching 33 and 32 % respectively. These results could be used to select parents for varietal breeding and obtain true potato seed offsprings}

Keywords : ^potato; ^flowering; ^fruiting; ^parents; ^seeds.

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