Results 1 to 10 of about 20,914 (286)

200 years Mendel: the grapevine breeding perspective

Journal für Kulturpflanzen, 2022
Mendelian rules in grapevine breeding remained hidden for a long time in the complexity of traits and difficulties of hand­ling the crop. A few traits with minor relevance for breeders had been genetically dissected like berry color or autumn leaf color.
Reinhard Töpfer, Oliver Trapp
doaj   +2 more sources

High-Throughput Phenotyping of Leaf Discs Infected with Grapevine Downy Mildew Using Shallow Convolutional Neural Networks

Agronomy, 2021
Objective and standardized recording of disease severity in mapping crosses and breeding lines is a crucial step in characterizing resistance traits utilized in breeding programs and to conduct QTL or GWAS studies.
Daniel Zendler, Nagarjun Malagol, Anna Schwandner, Reinhard Töpfer, Ludger Hausmann, Eva Zyprian   +5 more
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Relieving the Phenotyping Bottleneck for Grape Bunch Architecture in Grapevine Breeding Research: Implementation of a 3D-Based Phenotyping Approach for Quantitative Trait Locus Mapping

Horticulturae, 2022
In viticulture, winemakers and the industry demand grape bunches that have a reduced degree of bunch compactness. The major aspect is that a loose bunch compactness reduces the risk of severe Botrytis bunch-rot infections. Grapevine breeders focus hereby
Florian Rist, Florian Schwander, Robert Richter, Jennifer Mack, Anna Schwandner, Ludger Hausmann, Volker Steinhage, Reinhard Töpfer, Katja Herzog   +8 more
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Confirmation and Fine Mapping of the Resistance Locus Ren9 from the Grapevine Cultivar ‘Regent’

Plants, 2020
Grapevine (Vitis vinifera ssp. vinifera) is a major fruit crop with high economic importance. Due to its susceptibility towards fungal and oomycete pathogens such as Erysiphe necator and Plasmopara viticola, the causal agents of powdery and downy mildew (
Daniel Zendler, Reinhard Töpfer, Eva Zyprian   +2 more
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Transcriptomic analysis of temporal shifts in berry development between two grapevine cultivars of the Pinot family reveals potential genes controlling ripening time

BMC Plant Biology, 2021
Background Grapevine cultivars of the Pinot family represent clonally propagated mutants with major phenotypic and physiological differences, such as different colour or shifted ripening time, as well as changes in important viticultural traits ...
Jens Theine, Daniela Holtgräwe, Katja Herzog, Florian Schwander, Anna Kicherer, Ludger Hausmann , Prisca Viehöver, Reinhard Töpfer, Bernd Weisshaar   +8 more
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Towards Sensor-Based Phenotyping of Physical Barriers of Grapes to Improve Resilience to Botrytis Bunch Rot

Frontiers in Plant Science, 2022
Botrytis bunch rot is one of the economically most important fungal diseases in viticulture (aside from powdery mildew and downy mildew). So far, no active defense mechanisms and resistance loci against the necrotrophic pathogen are known.
Katja Herzog, Florian Schwander, Hanns-Heinz Kassemeyer, Hanns-Heinz Kassemeyer, Evi Bieler, Markus Dürrenberger, Oliver Trapp, Reinhard Töpfer   +7 more
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Determination of Sugars and Acids in Grape Must Using Miniaturized Near-Infrared Spectroscopy

Sensors, 2023
An automatic determination of grape must ingredients during the harvesting process would support cellar logistics and enables an early termination of the harvest if quality parameters are not met.
Lucie Cornehl, Julius Krause, Xiaorong Zheng, Pascal Gauweiler, Florian Schwander, Reinhard Töpfer, Robin Gruna, Anna Kicherer   +7 more
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Genetic Diversity of Armenian Grapevine (Vitis vinifera L.) Germplasm: Molecular Characterization and Parentage Analysis

Biology, 2021
Armenia is an important country of origin of cultivated Vitis vinifera subsp. vinifera and wild Vitis vinifera subsp. sylvestris and has played a key role in the long history of grape cultivation in the Southern Caucasus.
Kristine Margaryan, Gagik Melyan, Franco Röckel, Reinhard Töpfer, Erika Maul   +4 more
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The Durability of Quantitative Host Resistance and Variability in Pathogen Virulence in the Interaction Between European Grapevine Cultivars and Plasmopara viticola

Frontiers in Agronomy, 2021
European grapevine, Vitis vinifera, carries no major resistances against Plasmopara viticola, the causal agent of grapevine downy mildew. The introgression of quantitative trait loci conferring resistance to P.
Lisa Heyman, Rebecca Höfle, Anna Kicherer, Oliver Trapp, Essaid Ait Barka, Reinhard Töpfer, Monica Höfte   +6 more
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Wild grapes of Armenia: unexplored source of genetic diversity and disease resistance

Frontiers in Plant Science, 2023
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.
Kristine Margaryan, Kristine Margaryan, Reinhard Töpfer, Boris Gasparyan, Arsen Arakelyan, Oliver Trapp, Franco Röckel, Erika Maul   +7 more
doaj   +1 more source