Abstract
Low sugar accumulation during low temperature holding is a most sought after characteristic in a potato cultivar utilized for processing. Although this property is largely inherited, the lack of a reliable biochemical test capable of screening large numbers of new breeding lines with low sugar accumulating ability has hampered present selection procedures of plant breeders. This study examined the concentration of individual sugar components and the ratios of sugar components from 80 to 110 day-old plants of three commercial potato cultivars, White Rose, Russet Burbank and Norchip, each with different inherent capacity to accumulate sugars under low temperature holding. By determining the fructose and glucose concentration of potatoes from 110-day old plants and calculating the fructose/ glucose ratio, it was possible at harvest to separate cultivars that accumulate high concentrations of sugars during cold storage from those that accumulate low concentration of sugars
Resumen
La baja acumulación de azúcar durante el almacenamiento a temperatura baja, es una característica muy deseada en cultivares para procesamiento. Aunque esta propiedad es altamente hereditaria, la falta de una prueba bioquímica segura, capaz de tamizar un gran número de líneas en mejoramiento para una baja acumulación de azúcar, ha tratado los actuales procedimientos de selección de los mejoradores. Este estudio examinó la concentración individual de azúcares componentes y la proporción de azúcares componentes de plantas de 80 a 110 días de edad de los cultivares comerciales White Rose, Russet Burbank y Norchip, cada uno con una diferente capacidad inherente para acumular azúcares cuando son mantenidos a temperaturas bajas. Mediante la determinación de la concentración de fructosa y glucosa de papas proveniente de plantas de 110 días de edad y calculando la proporción fructosa/glucosa, fue posible separar a la cosecha cultivares que acumulan altas concentraciones de azúcar de aquellos cuya concentración es baja durante el almacenamiento frío
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Weaver, M.L., Timm, H. Significance of the fructose/glucose ratio in screening potato breeding lines with processing potential. American Potato Journal 60, 329–338 (1983). https://doi.org/10.1007/BF02854077
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DOI: https://doi.org/10.1007/BF02854077