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Shi M, Savoi S, Sarah G, Soriano A, Weber A, Torregrosa L, Romieu C. Vitis rotundifolia Genes Introgressed with RUN1 and RPV1: Poor Recombination and Impact on V. vinifera Berry Transcriptome. PLANTS (BASEL, SWITZERLAND) 2024; 13:2095. [PMID: 39124212 PMCID: PMC11314213 DOI: 10.3390/plants13152095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024]
Abstract
Thanks to several Vitis vinifera backcrosses with an initial V. vinifera L. × V. rotundifolia (previously Muscadinia rotundifolia) interspecific cross, the MrRUN1/MrRPV1 locus (resistance to downy and powdery mildews) was introgressed in genotypes phenotypically close to V. vinifera varieties. To check the consequences of introgressing parts of the V. rotundifolia genome on gene expression during fruit development, we conducted a comparative RNA-seq study on single berries from different V. vinifera cultivars and V. vinifera × V. rotundifolia hybrids, including 'G5' and two derivative microvine lines, 'MV102' (resistant) and 'MV32' (susceptible) segregating for the MrRUN1/RPV1 locus. RNA-Seq profiles were analyzed on a comprehensive set of single berries from the end of the herbaceous plateau to the ripe stage. Pair-end reads were aligned both on V. vinifera PN40024.V4 reference genome, V. rotundifolia cv 'Trayshed' and cv 'Carlos', and to the few resistance genes from the original V. rotundifolia cv '52' parent available at NCBI. Weighted Gene Co-expression Network Analysis (WGCNA) led to classifying the differentially expressed genes into 15 modules either preferentially correlated with resistance or berry phenology and composition. Resistance positively correlated transcripts predominantly mapped on the 4-5 Mb distal region of V. rotundifolia chromosome 12 beginning with the MrRUN1/MrRPV1 locus, while the negatively correlated ones mapped on the orthologous V. vinifera region, showing this large extremity of LG12 remained recalcitrant to internal recombination during the successive backcrosses. Some constitutively expressed V. rotundifolia genes were also observed at lower densities outside this region. Genes overexpressed in developing berries from resistant accessions, either introgressed from V. rotundifolia or triggered by these in the vinifera genome, spanned various functional groups, encompassing calcium signal transduction, hormone signaling, transcription factors, plant-pathogen-associated interactions, disease resistance proteins, ROS and phenylpropanoid biosynthesis. This transcriptomic insight provides a foundation for understanding the disease resistance inherent in these hybrid cultivars and suggests a constitutive expression of NIR NBS LRR triggering calcium signaling. Moreover, these results illustrate the magnitude of transcriptomic changes caused by the introgressed V. rotundifolia background in backcrossed hybrids, on a large number of functions largely exceeding the ones constitutively expressed in single resistant gene transformants.
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Affiliation(s)
- Mengyao Shi
- UMR AGAP Institute, University Montpellier, CIRAD, INRAE, Institute Agro, 34090 Montpellier, France; (M.S.); (G.S.); (A.S.); (A.W.)
| | - Stefania Savoi
- Department of Agricultural, Forest and Food Sciences, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, TO, Italy;
| | - Gautier Sarah
- UMR AGAP Institute, University Montpellier, CIRAD, INRAE, Institute Agro, 34090 Montpellier, France; (M.S.); (G.S.); (A.S.); (A.W.)
- UMT Geno-Vigne, IFV-INRAE-Institute Agro, 34060 Montpellier, France;
| | - Alexandre Soriano
- UMR AGAP Institute, University Montpellier, CIRAD, INRAE, Institute Agro, 34090 Montpellier, France; (M.S.); (G.S.); (A.S.); (A.W.)
| | - Audrey Weber
- UMR AGAP Institute, University Montpellier, CIRAD, INRAE, Institute Agro, 34090 Montpellier, France; (M.S.); (G.S.); (A.S.); (A.W.)
| | - Laurent Torregrosa
- UMT Geno-Vigne, IFV-INRAE-Institute Agro, 34060 Montpellier, France;
- LEPSE, University Montpellier, CIRAD, INRAE, Institute Agro, 34060 Montpellier, France
| | - Charles Romieu
- UMR AGAP Institute, University Montpellier, CIRAD, INRAE, Institute Agro, 34090 Montpellier, France; (M.S.); (G.S.); (A.S.); (A.W.)
- UMT Geno-Vigne, IFV-INRAE-Institute Agro, 34060 Montpellier, France;
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Perko A, Trapp O, Maul E, Röckel F, Piltaver A, Vršič S. Monitoring and Genotyping of Wild Grapevine ( Vitis vinifera L. subsp. sylvestris) in Slovenia. PLANTS (BASEL, SWITZERLAND) 2024; 13:1234. [PMID: 38732448 PMCID: PMC11085864 DOI: 10.3390/plants13091234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/20/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024]
Abstract
Vitis vinifera L. subsp. sylvestris (sylvestris) is the only native wild grapevine in Eurasia (Europe and western Asia) and is the existing ancestor of the grapevine varieties (for wine and table grape production) belonging to the subsp. sativa. In Slovenia, the prevailing opinion has been that there are no Slovenian sylvestris habitats. This study describes sylvestris in Slovenia for the first time and aims to present an overview of the locations of the wild grapevine in the country. In this project, a sample set of 89 accessions were examined using 24 SSR and 2 SSR markers plus APT3 markers to determine flower sex. The accessions were found in forests on the left bank of the Sava River in Slovenia, on the border between alluvial soils and limestone and dolomite soils, five different sites, some of which are described for the first time. The proportion of female to male accessions differed between sites. At two sites, female plants dominated; at others, the ratio was balanced. The plants' genetic diversity and structure were compared with autochthonous and unique varieties of subsp. sativa from old vineyards in Slovenia and with rootstocks escaped from nature from abandoned vineyards. Sylvestris was clearly distinguishable from vinifera and the rootstocks. Based on genetic analyses, it was confirmed that Slovenian sylvestris is closest to the Balkan and German sylvestris groups. Meanwhile, a safety duplication of the wild grapevine accessions has been established at the University Centre of Viticulture and Enology Meranovo, Faculty of Agriculture and Life Sciences at the University of Maribor.
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Affiliation(s)
- Andrej Perko
- University Centre of Viticulture and Enology Meranovo, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia;
| | - Oliver Trapp
- Julius Kühn Institute (JKI)-Federal Research Centre of Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, 76833 Siebeldingen, Germany; (O.T.); (F.R.)
| | - Erika Maul
- Julius Kühn Institute (JKI)-Federal Research Centre of Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, 76833 Siebeldingen, Germany; (O.T.); (F.R.)
| | - Franco Röckel
- Julius Kühn Institute (JKI)-Federal Research Centre of Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, 76833 Siebeldingen, Germany; (O.T.); (F.R.)
| | - Andrej Piltaver
- Institute for the Systematics of Higher Fungi, Velika vas 17, 1262 Dol pri Ljubljani, Slovenia;
| | - Stanko Vršič
- University Centre of Viticulture and Enology Meranovo, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia;
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Ricciardi V, Crespan M, Maddalena G, Migliaro D, Brancadoro L, Maghradze D, Failla O, Toffolatti SL, De Lorenzis G. Novel loci associated with resistance to downy and powdery mildew in grapevine. FRONTIERS IN PLANT SCIENCE 2024; 15:1386225. [PMID: 38584944 PMCID: PMC10998452 DOI: 10.3389/fpls.2024.1386225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 03/06/2024] [Indexed: 04/09/2024]
Abstract
Among the main challenges in current viticulture, there is the increasing demand for sustainability in the protection from fungal diseases, such as downy mildew (DM) and powdery mildew (PM). Breeding disease-resistant grapevine varieties is a key strategy for better managing fungicide inputs. This study explores the diversity of grapevine germplasm (cultivated and wild) from Caucasus and neighboring areas to identify genotypes resistant to DM and PM, based on 13 Simple Sequence Repeat (SSR) loci and phenotypical (artificial pathogen inoculation) analysis, and to identify loci associated with DM and PM resistance, via Genome-Wide Association Analysis (GWAS) on Single Nucleotide Polymorphism (SNP) profiles. SSR analysis revealed resistant alleles for 16 out of 88 genotypes. Phenotypic data identified seven DM and 31 PM resistant genotypes. GWAS identified two new loci associated with DM resistance, located on chromosome 15 and 16 (designated as Rpv36 and Rpv37), and two with PM resistance, located on chromosome 6 and 17 (designated as Ren14 and Ren15). The four novel loci identified genomic regions rich in genes related to biotic stress response, such as genes involved in pathogen recognition, signal transduction and resistance response. This study highlights potential candidate genes associated with resistance to DM and PM, providing valuable insights for breeding programs for resistant varieties. To optimize their utilization, further functional characterization studies are recommended.
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Affiliation(s)
- Valentina Ricciardi
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
| | - Manna Crespan
- Centro di Ricerca per la Viticoltura e l'Enologia, Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA), Conegliano, Italy
| | - Giuliana Maddalena
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
| | - Daniele Migliaro
- Centro di Ricerca per la Viticoltura e l'Enologia, Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA), Conegliano, Italy
| | - Lucio Brancadoro
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
| | - David Maghradze
- Faculty of Viticulture-Winemaking, Caucasus International University, Tbilisi, Georgia
- Faculty of Agricultural Sciences and Biosystems Engineering, Georgian Technical University, Tbilisi, Georgia
| | - Osvaldo Failla
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
| | - Silvia Laura Toffolatti
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
| | - Gabriella De Lorenzis
- Dipartimento di Scienze Agrarie ed Ambientali, Università degli Studi di Milano, Milano, Italy
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Margaryan K, Töpfer R, Gasparyan B, Arakelyan A, Trapp O, Röckel F, Maul E. Wild grapes of Armenia: unexplored source of genetic diversity and disease resistance. FRONTIERS IN PLANT SCIENCE 2023; 14:1276764. [PMID: 38143573 PMCID: PMC10739323 DOI: 10.3389/fpls.2023.1276764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 11/16/2023] [Indexed: 12/26/2023]
Abstract
The present study is the first in-depth research evaluating the genetic diversity and potential resistance of Armenian wild grapes utilizing DNA-based markers to understand the genetic signature of this unexplored germplasm. In the proposed research, five geographical regions with known viticultural history were explored. A total of 148 unique wild genotypes were collected and included in the study with 48 wild individuals previously collected as seed. A total of 24 nSSR markers were utilized to establish a fingerprint database to infer information on the population genetic diversity and structure. Three nSSR markers linked to the Ren1 locus were analyzed to identify potential resistance against powdery mildew. According to molecular fingerprinting data, the Armenian V. sylvestris gene pool conserves a high genetic diversity, displaying 292 different alleles with 12.167 allele per loci. The clustering analyses and diversity parameters supported eight genetic groups with 5.6% admixed proportion. The study of genetic polymorphism at the Ren1 locus revealed that 28 wild genotypes carried three R-alleles and 34 wild genotypes carried two R-alleles associated with PM resistance among analyzed 107 wild individuals. This gene pool richness represents an immense reservoir of under-explored genetic diversity and breeding potential. Therefore, continued survey and research efforts are crucial for the conservation, sustainable management, and utilization of Armenian wild grape resources in the face of emerging challenges in viticulture.
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Affiliation(s)
- Kristine Margaryan
- Research Group of Plant Genomics, Institute of Molecular Biology of National Academy of Sciences Republic of Armenia (RA), Yerevan, Armenia
- Department of Genetics and Cytology, Yerevan State University, Yerevan, Armenia
| | - Reinhard Töpfer
- Julius Kuehn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Boris Gasparyan
- Institute of Archaeology and Ethnography, National Academy of Sciences Republic of Armenia (RA), Yerevan, Armenia
| | - Arsen Arakelyan
- Research Group of Plant Genomics, Institute of Molecular Biology of National Academy of Sciences Republic of Armenia (RA), Yerevan, Armenia
| | - Oliver Trapp
- Julius Kuehn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Franco Röckel
- Julius Kuehn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
| | - Erika Maul
- Julius Kuehn-Institute (JKI), Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
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Ilnitskaya ET, Makarkina MV, Gorbunov IV, Stepanov IV, Kozina TD, Kozhevnikov EA, Kotlyar VK. Genetic structure of the population of wild-growing vines of the Utrish Nature Reserve. Vavilovskii Zhurnal Genet Selektsii 2023; 27:316-322. [PMID: 37469454 PMCID: PMC10352994 DOI: 10.18699/vjgb-23-38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/11/2022] [Accepted: 10/31/2022] [Indexed: 07/21/2023] Open
Abstract
Grapes are one of the most common agricultural crops in the world. Currently, the analysis of genotypes directly at the DNA level is considered to be the most accurate method for studying the plant gene pool. The study of wild vines and ancient varieties in various regions of viticulture is an important direction of research in this field. The purpose of this work was to study the population of wild grapes growing on the territory of the Utrish Nature Reserve on the Black Sea coast of Krasnodar Region. The territory of the reserve is of interest as it is a site of ancient settlements, and the environmental conditions are suitable for the growth of wild grapes. During the survey of the territory, 24 samples of wild grapes were found, which were described according to the main morphological characteristics and analyzed by the molecular genetic method. The found vines were genotyped using 15 DNA markers, including nine commonly used for DNA fingerprinting (VVS2, VVMD5, VVMD7, VVMD25, VVMD27, VVMD28, VVMD32, VrZAG62, VrZAG79) and VVIb23, which allows determining hermaphrodite and dioecious vines. Statistical processing of microsatellite loci polymorphism data was carried out using the GenAlEx 6.5 program. The genetic relationships of the studied vines were evaluated using the PAST 2.17c program. The samples were found to be morphologically and genetically polymorphic. The number of alleles identified in the sample varied from 5 to 18 and averaged 8 alleles per locus. Statistical processing of DNA analysis data made it possible to identify two genetically different populations among the wild discovered vines. An assessment of genetic similarity of the found vines with some local varieties of geographically close viticulture regions, rootstocks and representatives of Vitis sylvestris from other territories was made. One of the populations found in the Utrish Nature Reserve is close to a number of V. sylvestris genotypes, the DNA profiles of which are presented in the Vitis International Variety Catalogue.
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Affiliation(s)
- E T Ilnitskaya
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
| | - M V Makarkina
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
| | - I V Gorbunov
- Anapa Zonal Experimental Station of Viticulture and Wine-making - Branch of North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Anapa, Russia
| | - I V Stepanov
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
| | - T D Kozina
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
| | - E A Kozhevnikov
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
| | - V K Kotlyar
- North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making, Krasnodar, Russia
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Bouamama-Gzara B, Zemni H, Sleimi N, Ghorbel A, Gzara L, Mahfoudhi N. Diversification of Vascular Occlusions and Crystal Deposits in the Xylem Sap Flow of Five Tunisian Grapevines. PLANTS 2022; 11:plants11162177. [PMID: 36015480 PMCID: PMC9414702 DOI: 10.3390/plants11162177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/30/2022]
Abstract
Xylem vessels are essential pivotal organs in bulk hydraulic flow through the whole woody plant. However, environmental constraints generate disagreements in xylem structures, which are characterized by air emboli and occlusions formations, compromising water conductivity in grapevines. The aim of this work was to explore xylem morphology dynamics through the xylem sap flow of five Tunisian grapevine cultivars during the natural bleeding sap periods of 2019, 2021, and 2022. In fact, Sakasly, Khamri, Hencha, Razegui1, and Razegui2 rain-fed grapevine cultivars revealed differential responses towards xylem sap movement. The results demonstrated that the xylem sap flow was significantly more abundant in 2019 than 2021 and 2022 bleeding sap campaigns. A variation was revealed between the cultivars regarding the xylem sap flow. In fact, Sakasly gave the best xylem flow during the three campaigns. Razegui1 and Razegui2 registered approximately similar xylem sap flow, while Hencha and Khamri present the lowest sap fluxes during the three campaigns. Moreover, several vascular occlusions forms were identified from stem cross sections using environmental scanning electron microscopy (ESEM), including tyloses, gels, starch, and gum deposits. The highest occlusion number was observed in Sakasly, Razegui1, and Razegui2 cultivars. Among different biogenic calcium shapes, several were observed for the first time in grapevine, including multi-faceted druse, cubic, crystalline sand, styloids, spherical, or drop-like structures. Considering their lower flow and totally blocked vessels, both Hencha and Khamri confirmed their susceptibility to environmental constraints. However, Sakasly, Razegui1, and Razegui2 cultivars presented higher tolerance according to their sap flow and xylem morphology.
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Affiliation(s)
- Badra Bouamama-Gzara
- Laboratory of Plant Molecular Physiology, Center of Biotechnology of Borj-Cédria, University of Carthage, BP. 905, Hammam-Lif 2050, Tunisia
- Correspondence:
| | - Hassene Zemni
- Laboratory of Plant Molecular Physiology, Center of Biotechnology of Borj-Cédria, University of Carthage, BP. 905, Hammam-Lif 2050, Tunisia
| | - Noomene Sleimi
- Laboratory RME—Resources, Materials and Ecosystems, Faculty of Sciences of Bizerte, University of Carthage, Bizerte 7021, Tunisia
| | - Abdelwahed Ghorbel
- Laboratory of Plant Molecular Physiology, Center of Biotechnology of Borj-Cédria, University of Carthage, BP. 905, Hammam-Lif 2050, Tunisia
| | - Lassaad Gzara
- Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia
| | - Naima Mahfoudhi
- Laboratory of Plant Protection, National Institute of Agronomic Research of Tunisia, University of Carthage Rue Hedi Karray, El Menzah 1004, Tunisia
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GWAS Reveals a Novel Candidate Gene CmoAP2/ERF in Pumpkin ( Cucurbita moschata) Involved in Resistance to Powdery Mildew. Int J Mol Sci 2022; 23:ijms23126524. [PMID: 35742978 PMCID: PMC9223685 DOI: 10.3390/ijms23126524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/08/2022] [Accepted: 06/08/2022] [Indexed: 12/10/2022] Open
Abstract
Pumpkin (Cucurbita moschata Duchesne ex Poir.) is a multipurpose cash crop rich in antioxidants, minerals, and vitamins; the seeds are also a good source of quality oils. However, pumpkin is susceptible to the fungus Podosphaera xanthii, an obligate biotrophic pathogen, which usually causes powdery mildew (PM) on both sides of the leaves and reduces photosynthesis. The fruits of infected plants are often smaller than usual and unpalatable. This study identified a novel gene that involves PM resistance in pumpkins through a genome-wide association study (GWAS). The allelic variation identified in the CmoCh3G009850 gene encoding for AP2-like ethylene-responsive transcription factor (CmoAP2/ERF) was proven to be involved in PM resistance. Validation of the GWAS data revealed six single nucleotide polymorphism (SNP) variations in the CmoAP2/ERF coding sequence between the resistant (IT 274039 [PMR]) and the susceptible (IT 278592 [PMS]). A polymorphic marker (dCAPS) was developed based on the allelic diversity to differentiate these two haplotypes. Genetic analysis in the segregating population derived from PMS and PMR parents provided evidence for an incomplete dominant gene-mediated PM resistance. Further, the qRT-PCR assay validated the elevated expression of CmoAP2/ERF during PM infection in the PMR compared with PMS. These results highlighted the pivotal role of CmoAP2/ERF in conferring resistance to PM and identifies it as a valuable molecular entity for breeding resistant pumpkin cultivars.
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Ilnitskaya E, Makarkina M, Kozhevnikov E. Analysis of the SC8-0071-014 and sc47-18 loci co-segregated with Ren1 gene in the genotypes of seedless grape varieties. BIO WEB OF CONFERENCES 2022. [DOI: 10.1051/bioconf/20225302003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Powdery mildew (Erysiphe necator) is one of the most common and economically significant diseases of grapes. The main method of controlling the disease is pesticide treatment. To reduce chemical treatments, it is necessary to select and introduce resistant varieties into production. DNA markers are currently actively used in the study of grape genetic resources. Seedless grape varieties are highly demanded by consumers. Ren1 is one of the known and mapped vine resistance genes to powdery mildew, inherited from V. vinifera; linked DNA markers for this resistance locus are known. A study of 34 seedless grape genotypes was carried out using DNA markers SC8-0071-014 and sc47-18 co-segregated with Ren1. In the studied sample of varieties, 12 types of alleles were identified in the sc47-18 locus and 9 types of alleles in the SC8-0071-014 locus. Target fragments, according to linked marker loci, indicating the presence of the Ren1 resistance gene, were identified in grape variety Lotus (Kriulyanskiy x Yangi Er).
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