Nowadays, it is almost universally recognized that the viticulture of the future will require the management of grapevine pests and diseases with fewer chemical inputs. The development and the deployment of novel varieties - which are now extremely resistant to mildews as well as hold the potential to display a durable resistance during the coming years - are considered one of the most promising strategy towards an eco-friendly viticulture. In the frame of the Euregio project VITISANA, a collection of approximately 100 grapevine accessions - including (mid-)resistant genotypes derived from cross pollination between Vitis hybrid and vinifera varieties or backcrosses - was studied. Their leaf and cluster level of downy (DM) and powdery (PM) mildew resistance was evaluated in an untreated field (Marlengo, I) at veraison and harvesting time in both 2016 and 2017. In addition to attempting a true-to-type analysis, an exhaustive genetic characterization was carried out at the 12 exploitable loci associated to mildew resistance (R-loci) available in the literature to date. Besides genotypes carrying a single R-locus associated to DM or PM resistance, our findings highlighted the pyramiding of R-loci against DM in 15% and against PM in 35% of the total accessions. In particular, 56 genotypes resulted pyramided for R-loci to both mildews. Finally, combining the R-loci-based characterization of the studied traditionally bred resistant varieties with their pathogen response in untreated field, we will understand the impact of diverse R-loci assets on overcoming disease attacks under the same environmental conditions.

Zini, E.; Dolzani, C.; Stefanini, M.; Gratl, V.; Betta, G.; Dorigatti, C.; Velasco, R.; Letschka, T.; Vezzulli, S. (2018). A Vitis hybrid “library”: comparing diverse R-loci combinations and mildew resistance levels in field. In: XII International Conference on Grapevine Breeding and Genetics, Bordeaux, France, 15-20 July 2018: 235. handle: http://hdl.handle.net/10449/50042

A Vitis hybrid “library”: comparing diverse R-loci combinations and mildew resistance levels in field

Dolzani, C.;Stefanini, M.;Dorigatti, C.;Vezzulli, S.
Ultimo
2018-01-01

Abstract

Nowadays, it is almost universally recognized that the viticulture of the future will require the management of grapevine pests and diseases with fewer chemical inputs. The development and the deployment of novel varieties - which are now extremely resistant to mildews as well as hold the potential to display a durable resistance during the coming years - are considered one of the most promising strategy towards an eco-friendly viticulture. In the frame of the Euregio project VITISANA, a collection of approximately 100 grapevine accessions - including (mid-)resistant genotypes derived from cross pollination between Vitis hybrid and vinifera varieties or backcrosses - was studied. Their leaf and cluster level of downy (DM) and powdery (PM) mildew resistance was evaluated in an untreated field (Marlengo, I) at veraison and harvesting time in both 2016 and 2017. In addition to attempting a true-to-type analysis, an exhaustive genetic characterization was carried out at the 12 exploitable loci associated to mildew resistance (R-loci) available in the literature to date. Besides genotypes carrying a single R-locus associated to DM or PM resistance, our findings highlighted the pyramiding of R-loci against DM in 15% and against PM in 35% of the total accessions. In particular, 56 genotypes resulted pyramided for R-loci to both mildews. Finally, combining the R-loci-based characterization of the studied traditionally bred resistant varieties with their pathogen response in untreated field, we will understand the impact of diverse R-loci assets on overcoming disease attacks under the same environmental conditions.
Downy mildew
Powdery mildew
Natural infection
Pyramiding
Resistance-associated markers
2018
Zini, E.; Dolzani, C.; Stefanini, M.; Gratl, V.; Betta, G.; Dorigatti, C.; Velasco, R.; Letschka, T.; Vezzulli, S. (2018). A Vitis hybrid “library”: comparing diverse R-loci combinations and mildew resistance levels in field. In: XII International Conference on Grapevine Breeding and Genetics, Bordeaux, France, 15-20 July 2018: 235. handle: http://hdl.handle.net/10449/50042
File in questo prodotto:
File Dimensione Formato  
2018 GBG 235.pdf

accesso aperto

Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 683.85 kB
Formato Adobe PDF
683.85 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/50042
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact