Carotenoids Variability of Potato Tubers in Relation to Genotype, Growing Location and Year

Abstract

In this study, three cultivars of potato and seven tetraploid breeding lines with different flesh colour were cultivated for three years at four locations in Poland. The objectives of this study were to quantify the levels of total (TC) and individual carotenoids (IC) and to determine the influence of genotype, farming system, growing location, years, and environment on the contents of these components. The aim of this study was also to identify genotypes with stable level of TC and IC. The mean total carotenoids content of tubers ranged between 5.57 and 20.20 mg kg −1 FW and was influenced by location, year, genotype, and their interactions. Mean values of lutein ranged from 2.92 to 6.66 mg kg −1 FWand zeaxanthin from 1.44 to 3.05 mg kg −1 FW. The most stable level of total carotenoids content was observed in tubers of breeding line TG-97-403. The most unstable level was found in tubers of cv. Jelly. The ranking of other genotypes depended on the used method. The presented study showed that the contents of carotenoids in potato tubers are significantly affected by environmental factors that cannot be controlled, because these are usually related to the year of cultivation. ResumenEn este estudio, se sembraron tres variedades de papa y siete líneas de mejoramiento tetraploides con diferente color de pulpa durante tres años en cuatro localidades en Polonia. Los objetivos de este estudio fueron cuantificar los niveles totales (TC) e individuales (IC) de carotenoides, y determinar la influencia del genotipo, sistema de cultivo, localidad, años, y el ambiente, en el contenido de estos componentes. La meta de este estudio también fue la de identificar genotipos con niveles estables de TC e IC. La media del contenido total de carotenoides de los tubérculos fluctuó entre 5.57 y 20.20 mg kg-1 de peso fresco y fue influenciada por la localidad, el año, el genotipo, y sus interacciones. Los valores medios de luteína variaron de 2.92 a 6.66 mg kg-1 en peso fresco, y la zeaxantina de 1.44 a 3.05 mg kg-1 de peso fresco. El nivel más estable del contenido de carotenoides totales se observó en tubérculos de la línea TG-97-403. El nivel mas inestable se encontró en tubérculos de la var. Jelly. Las cifras de otros genotipos dependieron del método usado. El presente estudio mostró que los contenidos de carotenoides en tubérculos de papa se afectan significativamente por factores ambientales que no pueden controlarse, porque generalmente están relacionados por el año de su cultivo.

Antioxidant properties of potato tubers (Solanum tuberosum L.) as a consequence of genetic potential and growing conditions

“…However, it is a common problem to characterize a cultivar by several properties, because such an evaluation has a multidimensional character. The knowledge about the relationship of several traits is crucial for a clear statement, resulting in the challenge to determine, which combination is most suitable [29]. In order to solve this problem, it is important to standardize the different properties, which allows an effective comparison.…”

“…These clones are still under examination for their suitability for different production systems, especially for organic farming. In the first line, they were developed for higher contents of carotenoids [29]. This does not necessary result at the same time in a stable or appropriate acclimatization to different growing conditions and generally high production of antioxidants.…”

“…This does not necessary result at the same time in a stable or appropriate acclimatization to different growing conditions and generally high production of antioxidants. The tetraploid breeding line TG-97-403 is characterized by a contribution of Solanum phureja in its pedigree (about 15.6%), which was chosen for a higher resistance to Phytophthora infestans and for higher carotenoids contents in tubers [29]. Clone 13-VIII-45 had as an exception a single pollen parent and a seed parent, both with high contents of carotenoids in their tubers (other clones had seed parents of low content).…”

“…An influence of the environment was indicated only in the case, when the mean value of the needed characteristic was better in the given location across all investigated varieties. Detailed description of plant materials and also field trials has already been published by Keutgen et al [28] and Tatarowska et al [29].…”

Quality Evaluation, Phytochemical Characteristics and Estimation of Beta-Carotene Hydroxylase 2 (Chy2) Alleles of Interspecific Potato Hybrids

“…Data on the influence of environmental factors on carotenoid levels in tubers are insufficient. According to Tatarowska et al [27], total carotenoid content in potato tubers are significantly affected by environmental factors, but it is impossible to control them, because these are dependent on the cultivation year. The variability in total carotenoid content did not demonstrate a strong association with applied cultivation systems.…”