Tuber Skin Research Articles

The inhibition effect of high temperature stress on potato tuber skin coloring mainly occurred in the belowground part of the plant.

High temperature stress leads to a dramatic reduction of both the anthocyanin concentration and the appearance quality of colored potatoes. However, it remains uncertain if the high temperature impacts potato tuber skin coloring through only the aerial or belowground parts of the plant, or through their interaction; and it's underlying reason is still unclear. In this study, the red-skin cultivar Qingshu9 (Qs9) was exposed to the high-temperature (30°C) treatment on the belowground part alone (BH), aerial part alone (AH) and entire plant (EH), and the normal-temperature treatment on entire plant (EN) as control. The results indicated that the total anthocyanin content in tuber skin of the BH treatment was significantly lower than the EN and AH treatment, and there was no accumulation of cyanidin and pelargonidin in BH treatment, only peonidin. Compared with the EN treatment, the decrease rate of total anthocyanin content of the AH treatment was much smaller than the BH treatment, and the composition of anthocyanin did not change. Transcriptome analysis showed the downregulated DEGs of BH vs EN, BH vs AH and AH vs EN were significantly associated with the anthocyanin synthesis and metabolism pathway. High temperature inhibited anthocyanin synthesis by reducing the expression of key genes (StPAL, StF3H, StF3'H, StF3'5'H, StDFR and StANS) in the anthocyanin synthesis pathway. In summary, high temperature inhibits anthocyanin synthesis in tuber skin by downregulating key genes, and this inhibitory effect mainly occurs through the belowground part of the plant.

Skin morphology of five species of rock lizards of the genus Darevskia (Lacertidae, Squamata)

The microstructure of the tuberculate dorsal and lamellar ventral skin of the body in rock lizards of different ages (Darevskia raddei, D. nairensis, D. valentini, D. dahli, D. armeniaca) has been described for the first time. The thickness of the skin in the most xerophilic species (D. raddei) is less than that in the more hygrophilic species. Rock lizards have single or paired longitudinal skin folds that are not closed from the side, which stretch along the inner side of the scales to its distal edge. Small folds are also present in the lining of the squamous pocket; they consist of all layers of the skin and subcutaneous tissue. A large fold is able to completely block the cavity of the squamous pocket, the volume of which changes with the contraction of the subcutaneous muscle bundles reaching the bases of the scales. Small folds are also present on the scales of tuberous skin. In hygrophilic lizards (Zootoca vivipara), similar formations appear at later stages of postnatal ontogenesis than in rock lizards. The probable functional significance of the described skin structures is discussed.

Silica Accumulation in Potato (Solanum tuberosum L.) Plants and Implications for Potato Yield Performance-Results from Field Experiments in Northeast Germany.

The potato is the most important non-cereal food crop, and thus improving potato growth and yield is the focus of agricultural researchers and practitioners worldwide. Several studies reported beneficial effects of silicon (Si) fertilization on potato performance, although plant species from the family Solanaceae are generally considered to be non-Si-accumulating. We used results from two field experiments in the temperate zone to gain insight into silica accumulation in potato plants, as well as corresponding long-term potato yield performance. We found relatively low Si contents in potato leaves and roots (up to 0.08% and 0.3% in the dry mass, respectively) and negligible Si contents in potato tuber skin and tuber flesh for plants grown in soils with different concentrations of plant-available Si (field experiment 1). Moreover, potato yield was not correlated to plant-available Si concentrations in soils in the long term (1965-2015, field experiment 2). Based on our results, we ascribe the beneficial effects of Si fertilization on potato growth and yield performance reported in previous studies mainly to antifungal/osmotic effects of foliar-applied Si fertilizers and to changes in physicochemical soil properties (e.g., enhanced phosphorus availability and water-holding capacity) caused by soil-applied Si fertilizers.

Morphological characterization of indigenous potato (Solanum tuberosum) genotypes

Potato (Solanum tuberosum L.) is the most important non-grained food and vegetable crop lauded for its nutritional and health benefits. Identifying any new potato genotype primarily depends on its morphological traits, including vegetative, floral and tuber parameters. The present study was carried out during 2020–21 and 2021–22 at the research farm of ICAR-Central Potato Research Institute, regional station, Modipuram, Uttar Pradesh and at ICAR-Central Potato Research Institute, Kufri-Fagu unit, Himachal Pradesh (for floral traits) to evaluate the potato genotypes for vegetative and tuber traits. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Total of 64 indigenous potato genotypes were characterized for 51 morphological traits for distinctiveness, uniformity and stability (DUS) test guidelines. For all traits, there was a high degree of variability between genotypes. Early maturing varieties are preferred owing to their suitability to fit into the potato-wheat (Triticum aestivum L.)- paddy (Oryza sativa L.) cropping system. Most genotypes were either early or medium maturing based on foliage senescence. High variability was observed for tuber shape, i.e. genotypes bearing flattened, round, ovoid, oblong, long-oblong and reniform-shaped tubers were available. Tuber skin and flesh colour determining consumer preference depicted variability from whitish cream to dark purple-black skinned tubers. Novel genotypes bearing variegated tuber flesh with a niche market of specific consumer segments were noticed in genotypes Red flesh, Bareilly red, DRR Blue, Badami aloo and Kala aloo. Moreover, the results obtained from the present investigation indicated that the description of 64 indigenous potato genotypes based on notes can be used as a reference for the protection of new varieties under the Protection of Plant Varieties and Farmers Right Act (PPV&FRA) rules as well as a comparison against new candidate varieties.

Potato black dot, a tricky disease caused by Colletotrichum coccodes in Inner Mongolia of China

AbstractPotato black dot became an increasingly severe disease in Inner Mongolia, mainly infecting tubers, causing silvery to brown lesions on tuber skin with poorly defined margins and forming black sclerotia later as a sign of skin blemish diseases which significantly affected the yield and fresh market. The C11 and E21 strains isolated from symptomatic tubers of Harqin and Dalate counties were both identified as Colletotrichum coccodes by morphological and molecular identification. Tubers showing silver or brown scurf and black dot on skin were consistent with symptomatic samples collecting from the field in pathogenicity test. This study for pathogenic identification ascertained a tricky disease of potato in Inner Mongolia of China which will lay the foundation for subsequent studies on disease control.

Studying anthocyanins in the skin and flesh of the tubers of some potato hybrids (<i>Solanum tuberosum</i> L.)

Relevance. Today special attention is paid to potato anthocyanins as components of functional food. Increasing interest is generated by research on the use of anthocyanins for the benefit of animals and people in addition to their significant role in the life of plants. The research goal was to identify the quantitative and qualitative composition of anthocyanins in the tubers of valuable potato hybrids of Primorsky selection. Five promising potato hybrids (Solanum tuberosum L.) belonging to different groups of maturity and involved in the comparative variety testing by FSBSI “FSC of Agricultural Biotechnology named after A. K. Chaiki” were used as the research object. The research was carried out under the conditions of field and laboratory experiments in Primorsky kray, Russia, in 2018-2023. The anthocyanins were divided by the method of high-performance liquid chromatography. The anthocyanins were identified by the method of second-order mass spectrometry. Results. The research evaluated the potato hybrids for the content of anthocyanins in the tissues of the tubers – skin and flesh. The following specimens were determined to have a high content of anthocyanins both in the skin and flesh: Pri-15-12-14 (petunidin-3-arabinoside: 310.0 and 91.1 mg/kg; cyanidin-3-glucoside: 149.8 and 39.8 mg/kg) and Pri-14-52-2 (petunidin-3-arabinoside: 360.0 and 143.0 mg/kg; cyanidin-3-glucoside: 80.4 and 81.2 mg/kg). The selected specimens were characterized by purple and blue-purple skin. Genotypes Pri-14-52-2 and Pri-15-12-14 had tuber flesh with purple pigmentation. Hybrids Pri-15-12-14 and Pri-14-52-2 had the highest total content of anthocyanins in the flesh – 130.9 and 224.2 mg/kg, respectively. The conducted research identified eight different anthocyanins in the tubers of the studied potato specimens: delphinidin-3-glucoside, delphinidin-3-ramnosil-5-glucoside, petunidin-3-glucoside, malvidin-3-glucoside, cyanidin-3-glucoside, cyanidin-3-ramnosil-5-glucoside, pelargonidin-3-glucoside, and petunidin-3-arabinoside. The tubers with pink and red skin were determined to contain pelargonidin-3-glucoside. Petunidin-3-glucoside and cyanidin-3-glucoside colored tuber skin purple. The selected group of specimens might be recommended for use as functional food and in goal-oriented breeding.

A scalable, low‐cost phenotyping strategy to assess tuber size, shape, and the colorimetric features of tuber skin and flesh in potato breeding populations

AbstractTuber size, shape, colorimetric characteristics, and defect susceptibility are all factors that influence the acceptance of new potato cultivars. Despite the importance of these characteristics, our understanding of their inheritance is substantially limited by our inability to precisely measure these features quantitatively on the scale needed to evaluate breeding populations. To alleviate this bottleneck, we developed a low‐cost, semiautomated workflow to capture data and measure each of these characteristics using machine vision. This workflow was applied to assess the phenotypic variation present within 189 F1 progeny of the A08241 breeding population. Machine vision was applied to estimate linear and volumetric tuber size, assess tuber shape characteristics using aspect ratio and biomass profiles, and quantify tuber skin and flesh color; additionally, a deep learning mode was developed to classify the presence of hollow‐heart defect. Our results provide an example of quantitative measurements acquired using machine vision methods that are reliable, heritable, and capable of being used to understand and select multiple traits simultaneously in structured potato breeding populations.

Starch Plays a Key Role in Sporosorus Formation by the Powdery Scab Pathogen Spongospora subterranea.

Powdery scab disease, caused by the soilborne protist Spongospora subterranea f. sp. subterranea, poses a major constraint to potato production worldwide. Disease symptoms include damage to the tuber skin and the formation of root galls. This study aimed to investigate the potential mechanism behind the formation of sporosori, which are aggregates of resting spores, within root galls. Scanning electron microscopy analysis revealed that the early stage of gall formation, characterized by a white color, involved the accumulation of starch grains, which later disappeared as the gall matured and turned brown. The mature brown galls were found to contain fully formed sporosori. Light microscopy examination of ultramicrotome sections of the root galls showed that the high-amylopectin starches were surrounded by a plasmodium, a precursor to sporosorus. These findings suggest that starch grains contribute to the formation of a sponge-like structure within the sporosori. A significant reduction in total starch levels in both the root galls and their associated roots was observed compared with healthy roots. These findings indicate starch consumption by sporosori during the maturation of root galls. Interestingly, analysis of the transcript levels of starch-related genes showed downregulation of genes encoding starch degrading enzymes and an amylopectin-debranching enzyme, whereas genes encoding a starch synthase and a protein facilitating starch synthesis were upregulated in the infected roots. Overall, our results demonstrate that starch is consumed during sporosorus formation, and the pathogen likely manipulates starch homeostasis to its advantage for sporosorus development within the root galls.

Genome-wide association mapping to identify genetic loci governing agronomic traits and genomic prediction prospects in tetraploid potatoes

Genome-wide association studies (GWAS) and Genomic Prediction (GP) have become powerful tools for examining genetically complex traits in crops. The present study was undertaken on a diverse potato panel of 222 tetraploid potato cultivars and breeding lines, genotyped using genotyping with a sequencing approach to identify 120,622 high-quality single nucleotide polymorphism (SNP) markers. The phenotype data was observed on 12 agronomic traits, including morphological (qualitative) and tuber yield traits (quantitative). The population structure showed three different sub-populations with varying levels of admixtures in them. The LD decay was observed at ∼5Mb distance and GWAS using the Q+K model identified 46 marker-trait associations (MTAs), including 20 associations for tuber morphological traits and rest 26 for tuber yield traits. The average phenotypic variance captured by the associated SNPs was around 10 % for most traits. The putative candidate genes identified for different traits were cytochrome P450 71A4 for flesh color, phytochrome-B and ATP synthase subunit for tuber number, and receptor-like kinases and MYB transcription factor for tuber yield. We did not get any marker trait association for tuber skin color and chip score. The GP accuracy was moderate (0.3–0.5) to high (>0.5) for most of the traits except crisp score, tuber shape and marketable tubers, which recorded low GP accuracy. The reduced marker density did not show any decline in the GP accuracy of different traits. Overall, the study presents the genetic analysis of a diverse panel with information on genetic control and genomic predictions of complex traits for use in genomics-assisted breeding and genomic selection in potatoes.

Morphological Characteristics and Similarity Analysis of Cassava (Manihot esculenta Crantz) in Wonosobo, Temanggung, and Magelang Regencies

The diversity of cassava in Wonosobo, Temanggung and Magelang districts must be investigated. The objective of the study was to analyze the diversity of cassava based on morphological characteristics. The cassava of each accession was planted in Bandongan, Magelang Regency. Morphological characters observed after six months of planting included apical leaf color, apical leaf hair, leaf lobe shape, petiole color, leaf color, number of leaf lobes, leaf length, leaf width, petiole length, vein color, petiole orientation, color epidermis of stem, color of outer appearance of stem, distance between nodes, stem growth, color of mature branch tip, branching type, tuber, tuber shape, outer tuber skin color, tuber flesh color, and tuber inner skin color. Analysis of the morphological characteristics of cassava is presented in the form of a dendrogram using the MVSP (Multi Variate Statistical Package) version 3.22. The results of the study obtained 39 accessions of cassava which showed different morphological characteristics. The lowest morphological similarity (0.735) was found in Group I only consisted of 2 acquisitions that did not have tubers, namely Red Vegetables and Green Vegetables and Group II ( Groups III and IV) have a similarity of 0.92. The highest similarity was in groups IIIa and IIIb and Groups IVa and IVb have a similarity coefficient value of 0.95. The morphological diversity of 39 accessions is a source of cassava germplasm: 37 accessions are harvested for tubers and 2 accessions areharvested explicitly for leaves as vegetables. This research was useful for the development of cassava-based food industry bioproducts.

Integrated metabolomics and transcriptomics reveals difference involved in flavonoid and indole alkaloids biosynthesis in potato tuber flesh

Colored potatoes have garnered attention due to their higher nutrients compared to regular potatoes. This study describes a combined transcriptomic and metabolomic analysis of potato tubers originating from a single sexual cross between two parents with differing tuber skin and flesh colors. Through the use of RNA-seq, and UPLC-MS/MS metabolomics, this study aimed to elucidate the genetic and metabolic variations involved in the transmission of traits from tetraploid potato parents to hybrid F1 offspring. Our analysis revealed unique genes and metabolites associated with flavonoids and alkaloids within each group of offspring. Phenolic acids, flavonoids, and alkaloids are highlighted as key contributors to the positive heterosis observed in the tubers of potato hybrids, as assessed by calculating mid-parent heterosis for metabolites in three potato hybrids. At the overall metabolites level, hybrid SB (red-skinned and red-fleshed) exhibited a higher mid-parent heterosis than hybrid SA (purple-skinned and purple-fleshed) and SC (yellow-skinned and yellow-fleshed). Within hybrid SB tuber, specific accumulations of luteolin, salicin, isovitexin, and esculeoside B-5 were identified. Moreover, co-expression networks and correlation analysis pinpoint genes related to flavonoid and alkaloid biosynthesis. Notably, StDFR (dihydroflavonol reductase), a gene involved in flavonoid synthesis in potato tuber flesh, exhibits heightened expression in colored potato flesh. Additionally, we identified StYUCCA (indole-3-pyruvate monooxygenase), a gene regulating indole alkaloids synthesis, with elevated expression in yellow potato flesh. These findings provide insights into the utilization of heterosis breeding and the regulation of genes-metabolites in colored potato tuber flesh.

Analysis of Heat Transfer and Efficiency of Rack Type Flash Dryer Machine in Purple Sweet Potato Drying Process

Purple sweet potato (Ipomoea batatas var Ayumurasaki) has deep purple flesh and tuber skin. The variety of processed purple sweet potato products is increasingly diverse as purple sweet potato production increases, such as cookies and chips. Therefore, a process is needed to turn purple sweet potato into flour before being made into a variety of processed products, namely the drying process. Drying is a process of reducing the water content of a material to a certain level. To determine how much fuel is used by dryer machine, it is necessary to evaluate the effectiveness of the machine. So that in this study the aims were to determine the amount of energy needed to dry purple sweet potatoes, calculate the efficiency of the flash dryer machine and find out the temperature distribution on each tray of the drying machine. Based on the research results of the rack-type flash dryer drying machine, it can be concluded that the mechanism of the heat transfer rate in the purple sweet potato drying process occurs by forced convection heat transfer from the drying air to the purple sweet potatoes and a mass flow rate value of 0.1272 kg/s is obtained, the convection transfer rate in the drying chamber is 836.84 W and the sensible heat value is 1033.84 W. Hence, the amount of heat to dry 3 kg of purple sweet potato for 4 hours is 1870.68 W and an efficiency value of 55.26% is obtained. The total energy required to dry 3 kg of purple sweet potato in 4 hours is 5712.86 kJ.

Fourier Transform IR Spectroscopic Study of the Influence of a High Dose of Gamma Radiation on the Composition of Functional Groups in Potato Tubers

This article considers physicochemical changes in the composition of potato tubers gamma-irradiated to doses of 5000 kGy, as studied by Fourier transform IR spectroscopy. Functional groups in the powders of skin, pulp, and juice of irradiated tubers have been examined. The carbonization and radiationinduced oxidation of the molecules of tuber constituents have been established. At doses above 1000 kGy, the hardness of tubers was completely lost, the integrity of the skin surface was violated, and an intense release ofjuice began. It has been found that γ-radiolysis at a dose to 5000 kGy does not lead to the complete destruction of chemical bonds in the structure of the main compounds contained in potato tubers.

EFEK PEWARNAAN RAMBUT DARI EKSTRAK KULIT UMBI UBI UNGU (Ipomoea batatas L.) DENGAN VARIASI KONSENTRASI CU SULFAT SEBAGAI PEMBANGKIT WARNA

Hair dye is a cosmetic preparation intended to give the hair a new color or restore the original color. Purple sweet potato tuber skin contains more anthocyanin that can be used in the manufacture of hair dye preparations. The extract was prepared by maceration using 96% ethanol. Hair dyes were made into 4 formulas: Formula 0 was not added with a concentration of copper II sulfate, while Formulas 1, 2, and 3 were added with copper II sulfate concentrations of 0.5%, 1%, and 1.5%. The tests included organoleptic tests, homogeneity, pH, viscosity, hair coloring stability tests, including stability tests against washing and sunburn, and preference tests. The results showed that the hair dye gel preparations were homogeneous, had a distinctive odor of hair dye, and had brown (F0), brownish green (F1), and blackish green (F2 and F3) colors. The pH of the preparation ranged from 4.6 to 6.3, and the viscosity test ranged from 8243.5-8583.5 Cp. In the staining stabili

The Relationship of Sweet Potato Germplasm Based on Morphological Characters

Information about the morphological and genetic characteristics of sweet potato (Ipomoea batatas) is important in the variety development program. This experiment aimed to determine the diversity and genetic relationship of sweet potato accessions from NTT based on morphological character data. The research was carried out at Kendalpayak Research Station, Malang, East Java from April - September 2019. The materials used were seventy-one sweet potato germplasm from the ILETRI collection (collected from NTT). Each accession was planted on a 1 m × 5 m plot size, with a spacing of 100 × 20 cm (single row). Fertilization was carried out using a dose of “100 kg urea + 100 kg SP36 + 200 kg KCl ha-1”. The observed characters were the vines length, growth type, internode length, leaf length, leaf width, leaf size, leaf bone color, leaf shape, leaf characteristics, lobes number, lobe shape, mature leaf color, shoot color, pigmentation of petiole, young stems pigmentation (dominant and secondary color), young leaves feathers, tuber skin color, tuber flesh color, weight of canopy, number of tubers perplot, weight of tubers perplot, number and weight of tubers perplot. Cluster analysis was carried out using the Minitab 17 program. There was morphological diversity in seventy-one accessions of sweet potato germplasm from NTT. Principal component analysis resulted in seven main components with the proportion of diversity 76.3%. cluster analysis, seventy-one accessions of sweet potato germplasm were divided into fifteen accession groups on the basis of 80% degree. Characteristics of shoot color, mature leaf color, leaf size, petiole pigmentation, and leaf bone color contributed greatly to the total diversity.

Epigenetic Modifications Related to Potato Skin Russeting.

Potato tuber skin is a protective corky tissue consisting of suberized phellem cells. Smooth-skinned varieties are characterized by a clean, shiny appearance compared to the darker hue of russeted potatoes. The rough skin of russeted cultivars is a desired, genetically inherited characteristic; however, unwanted russeting of smooth-skinned cultivars often occurs under suboptimal growth conditions. The involvement of epigenetic modifiers in regulating the smooth skin russeting disorder was tested. We used smooth-skin commercial cultivars with and without the russeting disorder and three lines from a breeding population segregating for russeting. Anatomically, the russet skin showed similar characteristics, whether the cause was environmentally triggered or genetically determined. The old outer layers of the corky phellem remain attached to the newly formed phellem layers instead of being sloughed off. Global DNA methylation analysis indicated a significant reduction in the percentage of 5-methylcytosine in mature vs. immature skin and russet vs. smooth skin. This was true for both the smooth-skin commercial cultivars and the russeted lines. The expression level of selected DNA methyltransferases was reduced in accordance. DNA demethylase expression did not change between the skin types and age. Hence, the reduced DNA methylation in mature and russet skin is more likely to be achieved through passive DNA demethylation and loss of methyltransferase activity.

Screening of Different Potato Cultivars against Common Scab

Common scab of potato adversely affects the market value and reduces the economic values of potato due to presence of obnoxious black spots on skin of tubers. In present study twelve potato cultivars (SH-692, SH-704, Cardinal, FD-71-1, Sante, FD-51-5, FD-96-1, FD-63-1, FD-70-1, FD-8-3, FD-8-1, Asterix) were screened against disease in experimental area of department of Plant Pathology University of Agriculture Fasilabad during 2011-12. Among these twelve potato cultivars SH-692, SH-704 and Cardinal were least susceptible and showed disease incidence 32.60%, 53.80%, 4.80% respectively. Highly susceptible cultivars were FD-96-1, FD-63-1, FD-70-1, FD-3, FD-1 and Astarix and showed disease incidence 6.80%, 11.80%, 37.80%, 53.80%, 27.80 and 39.80% respectively. Previously reported resistance verity Asterix was highly susceptible in present study

IDENTIFIKASI JENIS-JENIS UBI KAYU (Manihot esculenta) DI KECAMATAN TOMIA TIMUR KABUPATEN WAKATOBI

This study aims to identify and describe the types of cassava in Tomia Timur District, Wakatobi Regency. The research was carried out in Tomia Timur Subdistrict, Wakatobi Regency, in December 2021 January 2022. This research is a survey research that is analyzed descriptively by statistics that is describing, describing, and describing the object being studied. The variables observed were stem color, branched and unbranched, stem height, stem diameter, distance between stem segments, leaf color, petiole color, leaf lobe length, tuber shape, wet tuber weight per tree, outer skin color of tuber, color inner skin of tubers, tuber flesh color, benefits of cassava plants, cultivation techniques, and soil conditions. The results showed that there were 10 types of cassava in Tomia Timur District, Wakatobi Regency, namely Kalambe cassava, Kalambe Fanse cassava, Ndoke cassava, Bogoro cassava, Bogoro Mohoro cassava, Makuri cassava, Andapatua cassava, Salbia cassava, cassava English wood, and Andabula cassava.

Responses of Aerial and Belowground Parts of Different Potato (Solanum tuberosum L.) Cultivars to Heat Stress

The mechanism of potato (Solanum tuberosum L.) thermotolerance has been the focus of intensive research for many years because plant growth and tuber yield are highly sensitive to heat stress. However, the linkage between the aerial and belowground parts of potato plants in response to high temperatures is not clear. To disentangle this issue, the aerial and belowground parts of the heat-resistant cultivar Dian187 (D187) and the heat-sensitive cultivar Qingshu 9 (Qs9) were independently exposed to high-temperature (30 °C) conditions using a special incubator. The results indicated that when the belowground plant parts were maintained at a normal temperature, the growth of the aerial plant parts was maintained even when independently exposed to heat stress. In contrast, the treatment that independently exposed the belowground plant parts to heat stress promoted premature senescence in the plant's leaves, even when the aerial plant parts were maintained at a normal temperature. When the aerial part of the plant was independently treated with heat stress, tuberization belowground was not delayed, and tuberization suppression was not as severe as when the belowground plant parts independently underwent heat stress. Heat stress on the belowground plant parts alone had virtually no damaging effects on the leaf photosynthetic system but caused distinct tuber deformation, secondary growth, and the loss of tuber skin colour. Transcriptome analysis revealed that the treatment of the belowground plant parts at 30 °C induced 3361 differentially expressed genes in the Qs9 cultivar's expanding tubers, while the D187 cultivar had only 10,148 differentially expressed genes. Conversely, when only the aerial plant parts were treated at 30 °C, there were just 807 DEGs (differentially expressed genes) in the D187 cultivar's expanding tubers compared with 6563 DEGs in the Qs9 cultivar, indicating that the two cultivars with different heat sensitivities have distinct regulatory mechanisms of tuberization when exposed to heat stress. The information provided in this study may be useful for further exploring the genes associated with high-temperature resistance in potato cultivars.

Tuber skin colour variation in the segregating populations of potatoes (Solanum tuberosum L.)

Tuber skin colour variation in the segregating populations of potatoes (Solanum tuberosum L.)