Morphological Tuber Characteristics in Genotypes of Solanum Phureja Juz et Buk and ats Relationship with Powdery Scab Incidence
Abstract
This research was carried out to determine the correlation between the morphological characteristics of Solanum phureja genotypes from germplasm collection of the National University of Colombia and its response to the symptoms of powdery scab on tubers. 93 genotypes were evaluated, ten tubers for each genotype were harvested from La Union (Ant). Both, density and lenticels area, periderm thickness, color skin and shape of the tubers was determined. The data obtained were compared with the information about incidence of powdery scab on tubers under field conditions. We found a wide genetic variability in the collection evaluated for all the morphological characteristics of tubers. Black skin tubers showed the highest density and lenticels area and the lowest periderm thickness, while genotypes with red skin tuber had lowest densities and lenticels area, and intermediate values for the periderm thickness. Furthermore, long tubers had the highest density of lenticels and lowest periderm thickness, while ovoid tubers had the opposite tendency. Spherical tubers showed low density of lenticels and periderm thickness. No relationship between morphological characteristics and the incidence of powdery scab on field was found.
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References
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