Die Ermittlung des Stärke‐ und Trockensubstanzgehaltes in Kartoffelknollen nach Bestimmung des Unterwassergewichtes an Hand modifizierter Tabellenwerte

Potato (Solanum tuberosum L.) is often considered a water-sensitive crop and its production can be threatened by drought events, making water stress tolerance a trait of increasing interest. In this study, a panel of 144 tetraploid potato genotypes was evaluated for two consecutive years (2019 and 2020) to observe the variation of several physiological traits such as chlorophyll content and fluorescence, stomatal conductance, NDVI, and leaf area and circumference. In addition, agronomic parameters such as yield, tuber fresh weight, tuber number, starch content, dry matter and reducing sugars were determined. GGP V3 Potato array was used to genotype the population, obtaining a total of 18,259 high-quality SNP markers. Marker-trait association was performed using GWASpoly package in R software and Q + K linear mixed models were considered. This approach allowed us to identify eighteen SNP markers significantly associated with the studied traits in both treatments and years, which were related to genes with known functions. Markers related to chlorophyll content and number of tubers under control and stress conditions, and related to stomatal conductance, NDVI, yield and reducing sugar content under water stress, were identified. Although these markers were distributed throughout the genome, the SNPs associated with the traits under control conditions were found mainly on chromosome 11, while under stress conditions they were detected on chromosome 4. These results contribute to the knowledge of the mechanisms of potato tolerance to water stress and are useful for future marker-assisted selection programs.

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“…After 72 h at 80 °C, they were weighed again to obtain the dry weight (DW). The starch content was calculated with the following formula [ 78 ]:

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Section: Methodsmentioning

confidence: 99%

Genome-Wide Association Study of Agronomic and Physiological Traits Related to Drought Tolerance in Potato

Alvarez-Morezuelas

Barandalla

Ritter

et al. 2023

Plants

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“…The starch content of a potato can be studied using various methods, e.g., on the basis of the specific weights of the potato tubers or using a polarimetric method developed by Evers and modified by Grossfeld. The specific weights of potatoes depend on their starch contents, so in the former method their values are assessed with the use of a hydrostatic scale (according to Reimann-Parow) or the Krocker method [6][7][8][9]. In that method, the samples of tubers are soaked in a solution of sodium chloride and more sodium chloride is added until the density of the solution is equal to the mean specific weight of the tuber sample.…”

Section: Introductionmentioning

confidence: 99%

Application of Digital Image Analysis for Assessment of Starch Content and Distribution in Potatoes

et al. 2022

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This study presents the possibility of using digital image analysis for the assessment of the starch content and distribution in potatoes. Tubers of six cultivars that were stored for 3 months in contrasting conditions (4 °C vs. −15 °C) were used in the experiment. The starch distribution in the potato tubers was assessed on the basis of histograms of the pixel values along four lines in the tuber cross-sections. Next, the basic statistics were calculated and used for the analysis of variance. The applied method allowed more precise distinguishing between the studied potato cultivars than comparing the total starch content alone. The new method also clearly distinguished potatoes stored in a freezer from those kept in a cold store.

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Der Einfluß verschiedener Düngergaben auf den Gehalt an stärkefreiem Material in Kartoffeln

Miča¹

1980

Starch Stärke

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Der Einfluß der Lagerung und der Düngung auf den Gehalt an stärkefreien Stoffen in Kartoffeln wurde untersucht. Aus den Ergebnissen geht hervor, daß besonders hohe Düngergaben den Gehalt an stärkefreien Stoffen beeinflussen können. Jeder Eingriff in die Synthese von Kohlenhydraten beeinflußt den Gehalt an stärkefreien Stoffen. Es wäre nötig, die Konstante von Märcker den heute angewendeten Düngergaben anzupassen.

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Die Ermittlung des Stärke‐ und Trockensubstanzgehaltes in Kartoffelknollen nach Bestimmung des Unterwassergewichtes an Hand modifizierter Tabellenwerte

Cited by 10 publications

References 6 publications

Genome-Wide Association Study of Agronomic and Physiological Traits Related to Drought Tolerance in Potato

Genome-Wide Association Study of Agronomic and Physiological Traits Related to Drought Tolerance in Potato

Application of Digital Image Analysis for Assessment of Starch Content and Distribution in Potatoes

Der Einfluß verschiedener Düngergaben auf den Gehalt an stärkefreiem Material in Kartoffeln

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