Zsolt Polgár

Zsolt Polgár
Szent István University, Godollo | szie · Potato Research Centre

PhD

About

67
Publications
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655
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August 2020 - April 2021
Szent István University, Godollo
Position
  • Managing Director

Publications

Publications (67)
Article
Full-text available
The length of tuber dormancy of potato varieties is an important factor in the profitability of the potato sector. Under temperate climatic conditions longer dormancy is more advantageous. However , in case of multiple planting within one growing season, in seed multiplication programs or during rapid post-harvest disease testing, breaking or short...
Article
Full-text available
The length of tuber dormancy of potato (Solanum tuberosum L.) is an important property of cultivars, which significantly determines the duration of storage period, the storage conditions, the economy of storage and the earliest time of planting. Potato cultivars can largely differ in the duration of dormancy period. Under temperate climatic conditi...
Article
Full-text available
Virus resistance genes carried by wild plant species are valuable resources for plant breeding. The Rysto gene, conferring a broad spectrum of durable resistance, originated from Solanum stoloniferum and was introgressed into several commercial potato cultivars, including ‘White Lady’, by classical breeding. Rysto was mapped to chromosome XII in po...
Preprint
Full-text available
Virus resistance genes carried by wild plant species are valuable resources for plant breeding. The Ry sto gene, conferring a broad spectrum of durable resistance, originated from Solanum stoloniferum and was introgressed into several commercial potato cultivars, including ‘White Lady’, by classical breeding. Ry sto was mapped to chromosome XII in...
Article
Introduction: Significant differences in nitrogen use efficiency (NUE) were detected previously among potato cultivars. Exploration of the genetic background may facilitate the breeding of cultivars with highly effective nitrogen use. Methods: Expression of NUE genes was analyzed at three different N-supply levels in five potato genotypes. Corre...
Article
Full-text available
Since potato production has been expanded into warmer regions, breeding heat-tolerant potato varieties has also been considered among the top priorities in most breeding programs in recent years. Identification of traits related to heat tolerance in potato is crucial for selection of heat-tolerant genotypes. The objective of this study was to evalu...
Article
Potato, the third most important food crop originates from temperate climatic zone characterised by moderate and even precipitation. Current climatic changes in Central European region mean serious challenges to the potato plant, its growers and breeders as well. The average daily temperature in the growing season is generally above the optimum and...
Article
Full-text available
To study the effect of cultivation system (conventional and organic) on potato tuber components, 42 parameters (anti-nutritives, micro- and macro-elements and 23 metabolites) were studied in three multi-resistant Hungarian potato varieties for three years in 2007-2009. Discriminant analysis of data proved that all investigated factors (farming tech...
Research
Full-text available
Expression analysis of biotic stress response genes were analyzed during a 65 h post inoculation with Phytophthora infestans in potato cultivar White Lady. Among different analyzed genes, homologs of five gene family were up regulated. Details of gene expression in different phase of attack by the pathogen were discussed in the article.
Article
Full-text available
Late blight disease caused by Phytophthora infestans is one of the most destructive diseases of potato. In the host an arsenal of genes may contribute to the resistance against the pathogen. In the presently available cultivars besides the so called field resistance which is conditioned by an unknown number of minor genes, race specific resistance...
Article
Full-text available
Anti-nutritive components in multi resistant potato cultivars were investigated in relation to conventional and organic farming for three years. Glycoalkaloids, nitrate, nitrite, asparagine, and glutamine contents of tubers were examined. Farming technology was found not to have an effect on the level of glycoalkaloids, which was influenced mostly...
Article
Full-text available
We have investigated the Total Glycoalcaloid (TGA), nitrite, and nitrate contents of some Hungarian and foreign potato cultivars in relation to the effect of different combination of fertilisers and green manure, late blight management strategies (none, programmed, or prediction based spraying), and irrigation regime for three years. The Hungarian...
Article
Full-text available
In this study the leaf area index (LAI), the leaf chlorophyll and the tuber nitrogen content of five potato genotypes (cultivar White Lady, Katica, Hópehely and Chipke, as well the S440 breeding line) were analyzed at three different nitrogen supply levels (N7.5, N3, N0.75). Potato tubers of uniform size (average 50.7 g) were planted in 3 l pots an...
Article
Using gas chromatography–mass spectrometry (GC–MS) as a system for the detection of amino acids, organic acids, sugars, sugar alcohols, and fatty acids, we characterised six commercial potato cultivars (Hópehely, Katica, Lorett, Somogyi kifli, Vénusz Gold, and White Lady) with different pedigrees, starch contents, cooking types, and dormancy period...
Conference Paper
Full-text available
Abstract Information on the molecular genetic background of biotic stress response is accumulating rapidly. High throughput analyzing methods, like next generation sequencing (NGS) enable the real time profiling of whole genome transcripts. In this study, we analyzed the expressional profile of biotic stress response genes which showed transcript...
Article
Full-text available
The Rx1 and Rx2 are extreme resistance genes, which have been introgressed from different species into potato cultivars and breeding lines. These two genes have a 98% and 96% sequence similarity at the nucleotide as well as at the amino acid level, respectively. Except one extra amino acid in the Rx2 gene, the high variations of the amino acid chai...
Article
Full-text available
Identification of quantitative trait loci (QTL) responsible for stress tolerance could help to develop new tolerant potato cultivars through markers-assisted selection. The objective of the research was to identify and map loci that may play major role in the control of osmotic stress tolerance in potato under in vitro vegetative growth conditions....
Article
Full-text available
Potato (Solanum tuberosum L.) is the fourth most important food crop in the world. It is the most economically valuable and well-known member of the plant family Solanaceae. Potato is the host of many pathogens, including fungi, bacteria, Phytoplasmas, viruses, viroids and nematodes, which cause reductions in the quantity and quality of yield. Apar...
Article
Based on the fractal analysis of digital images, a new classifying system has been proposed at the Potato Research Centre of Keszthely. It is a qualifying system generating objective values to distinguish potato varieties or detect quality differences within the genotype in a relatively simple way. The goal of the research project was to investigat...
Article
Full-text available
Three molecular markering techniques: start codon targeted (SCOT), inter-simple sequence repeat (ISSR) and random amplified polymorphic DNA (RAPD) markers were compared for fingerprinting of 24 varieties and a segregating population of tetraploid potato. The number of scoreable and polymorphic bands produced using the SCOT, ISSR and RAPD primers fo...
Article
Full-text available
Potato breeding programmes worldwide are undergoing a period of rapid change. In order to be successful, breeders must adapt and incorporate the newest up-to-date techniques as they become available. Recent advances in biotechnology make it possible to develop and cultivate more and more sophisticated transgenic crops with multiple modified traits....
Article
Full-text available
Unlabelled: Premise of the study: Intron Targeting (IT) primers were developed for potato using expressed sequence tags (EST) and NCBI database records to study genetic diversity. • Methods and results: Twenty-nine polymorphic intron targeting (IT) markers were generated and characterized from 30 samples of potato and 22 samples of Solanum nig...
Article
Determining virulence towards race-specific resistance genes is a prerequisite to understanding the response of pathogen populations to resistant cultivars, and therefore to assess the durability of these resistance genes and the performance of resistance management strategies. In Phytophthora infestans, virulence testing began shortly after the in...
Article
As a result of many decades of potato breeding in Keszthely, Hungary, numerous varieties resistant to the pathogens attacking potato have been developed using wild Solanum species as resistance sources. In order to simplify the time-consuming breeding process, the present research project involved the development of a SCAR marker correlating with t...
Article
Full-text available
In this study molecular markers linked to the Rysto gene, which originates from the wild potato species Solanum stoloniferum and confers extreme resistance against PVY, were identified and the applicability of recently published Rysto, markers was analyzed. Three RAPD markers covering a total distance of 8.60 cM were detected in this experiment. Th...
Article
Full-text available
Chromosome pairing relationships within cultivated potato (Solanum tuberosum) and its wild tuber-bearing relatives (Solanum sect. Petota) have been interpreted by genome formulas, developed in the early 1900s, through techniques of classic meiotic analysis of interspecific hybrids. Here we reexamine potato genome hypotheses with the first phylogene...
Article
Potato can be attacked by several economically important pathogens. From the various diseases, in our experiment we dealt with the bacterial soft rot of potato caused by Erwinia species. In the experiments back cross progenies (BC1, BC2, BC3 and BC4) of Solanum brevidens + Solanum tuberosum somatic hybrids produced by the Potato Research Centre, Ke...
Article
Full-text available
On the field of potato research and breeding, there are several possibilities for the application of modern digital image processing and data collection/analysing techniques. One of the most obvious methods is the multi/hyper spectral analysis. In our experiments research were done in the visible as well as in the infra, near infra and thermal wave...
Article
Full-text available
In this work potato genotypes originated from an intensive resistance breeding programme that includes unique combination of resistance to several pathogens and consumer response were analysed for glycoalcaloid content by reversed phase high performance liquid chromatographic method. The glycoalcaloids were concentrated from potato samples by solid...
Article
In our experiments we dealt with the bacterial soft rot of potato caused by Erwinia species. In the experiments back cross progenies (BC1, BC2, BC3 and BC4) of Solanum brevidens + Solanum tuberosum somatic hybrids produced by the Potato Research Centre, Keszthely were tested to the infection of E. carotovora ssp. carotovora (Eca) and E. chrysanthem...
Conference Paper
Full-text available
On the field of potato research and breeding there are several possibilities for the application of modern digital image processing and data collection/analysing techniques. One of the most obvious method is the multi/hyper spectral analysis. In our experiments research were done in the viewable as well as in the infra, near infra and thermal wavel...
Conference Paper
Full-text available
Az EMOR (Egzakt minősítő és osztályozó rendszer fejlesztése növénynemesítési és növénykórtani vizsgálatokhoz digitális képfeldolgozás alkalmazásával -IKTA-00101/2003, a program támogatója a Nemzeti Kutatási és Technológiai Hivatal) elnevezésű kutatási program célja olyan burgonya minősítő rendszer kidolgozása, amely szubjektív ítéleteket nem vagy m...
Conference Paper
Full-text available
Előadásunkban részletesen bemutatjuk az EMOR /Egzakt minősítő és osztályozó rendszer fejlesztése növénynemesítési és növénykórtani vizsgálatokhoz digitális képfeldolgozás alkalmazásával -IKTA-00101/2003/ kutatási program céljait és eddig elért eredményeinket. A program célja olyan minősítő rendszer kidolgozása, amely szubjektív ítéleteket nem vagy...
Conference Paper
Full-text available
In traditional breeding and official registration of potato varieties the characterisations of such valuable traits like resistances to different pathogens, mechanical damages or processing quality are frequently suffer from less precise measuring methods or subjective decisions of decision makers. In case of the estimation of resistance/susceptibi...
Conference Paper
Full-text available
The aim of EMOR program is to create a potato qualification system which doesn’t contain or contains only to a minimal degree a subjective verdict, and suits to EU and national regulations. It supports making the species-value determination more objective and exact by partially changing of the bonitation method still used. To do this it works out...
Conference Paper
Full-text available
Deteached leaf method is a commonly used laboratory technique for evaluation of horizontal resistance of different potato genotypes at the early stage of breeding programmes. Resistance level is identified by measurment of lesion size (diameter) and lesion growth rate. Purposes of this work were: development of an exact method for measurment of the...
Article
Full-text available
The molecular basis of the differential expression of the GM7-type metallocarboxypeptidase inhibitor (MCPI) genes in tuberizing (StMCPI) and non-tuberizing Solanum species (SbMCPI) was investigated. It was shown that the StMCPI is encoded by a gene family in Solanum tuberosum (potato), but SbMCPI might be a single-copy gene in the non-tuberizing sp...
Article
Full-text available
Leptines of Solanum chacoense are effective natural deterrents against the Colorado potato beetle. Leptines are the acetylated forms of the glycoalkaloids solanine and chaconine and are supposed to be synthesised via hydroxylated derivatives, called leptinines. Inheritance of leptinine production was studied in crosses of closely related S. chacoen...
Article
Three somatic hybrid lines between potato (cv. While Lady line no. Ke 79, 2n = 2x = 48) + Solanum brevidens (PI 218228, 2n = 2x = 24) were evaluated using randomly amplified polymorphic DNA (RAPD) markers. The lines originated from the same callus but showed different reactions to Erwinia carotovora ssp. carotovora, the cause of potato soft rot. By...
Article
Full-text available
An early identification of fusion products was based on the presumed vigorous growth of hybrid calluses after fusion between Solanum brevidens and S. tuberosum leaf protoplasts. The S. brevidens protoplasts were unable to form multicellular colonies under the applied culture conditions. Three size groups of calluses were separated and analyzed at t...
Article
Methods of plant regeneration from cell suspension and protoplast culture of Helianthus maximiliani are described. Embryogenic cell suspension was established from leaf callus on Murashige and Skoog (MS) medium containing naphtaleneacetic acid (NAA) and N-6-benzylaminopurine (BA). Plant regeneration occured via embryogenesis when cell clusters from...
Article
Methods of plant regeneration from callus and protoplasts of Helianthus giganteus L. are described. Embryogenic callus was obtained from leaf explants and plants were regenerated from these calli on MS media with different combinations of benzyladenine and naphtaleneacetic acid. Leaf protoplasts isolated from in vitro grown plants formed somatic em...
Article
A burgonya Y vírus (PVY) világviszonylatban az egyik legveszélyesebb kórokozója a burgonyának. A termést erős fertőzés, és fogékony fajta esetén akár 100 %-kal is csökkentheti. Az ellene való legcélravezetőbb védekezési lehetőség a rezisztens fajták termesztése. Ennek megfelelően kutatási projektünk célja a keszthelyi fajtákra jellemző S. stolonife...
Article
A kutatások munkák során vad Solanum fajok (S. acroscopicum, S. albornosii, S. arnesii, S. ambosinum, S. tarnii) genotípusainak PVYNTN fertőzéssel szemben mutatott reakcióinak virológiai és molekuláris jellemzését végeztük el a Pannon Egyetem Georgikon Karán. Célunk az eredmények felhasználása burgonyanemesítési programokban. DAS-ELISA vírusfertőzé...
Article
Jelen kutatás célja a Solanum stoloniferum vad burgonya fajból származó burgonya Y vírus extrém rezisztencia gén (Rysto) finomtérképezése és lokalizálása volt a tetraploid burgonya genomban. Munkánk során előállítottunk egy 1100 F1 egyedet tartalmazó térképező populációt, amely hasad az Rysto génre nézve. Minden egyes genotípust hagyományos reziszt...

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