Grapevine downy mildew, caused by Plasmopara viticola, is one of the most important diseases at the international level. The mainly cultivated Vitis vinifera varieties are generally fully susceptible to P. viticola, but little information is available on the less common germplasm. The V. vinifera germplasm of Georgia (Caucasus) is characterized by a high genetic diversity and it is different from the main European cultivars. Aim of the study is finding possible sources of resistance in the Georgian autochthonous varieties available in a field collection in northern Italy. The resistance levels to P. viticola were estimated both by experimental inoculations and by disease assessment in field conditions in a multi-year activity. Of the 93 tested accessions, 'Mgaloblishvili N' showed a constant resistant behaviour, by reducing the disease severity and the pathogen sporulation. High levels of leaf hair density did not always associate with reduced disease gravity in experimental inoculations, confirming that this kind of preformed barrier is not completely efficient in preventing pathogen infections.

Evidence of resistance to the downy mildew agent Plasmopara viticola in the Georgian Vitis vinifera germplasm / S.L. Toffolatti, G. Maddalena, D. Salomoni, D. Maghradze, P.A. Bianco, O. Failla. - In: VITIS. - ISSN 0042-7500. - 55:3(2016), pp. 121-128. [10.5073/vitis.2016.55.121-128]

Evidence of resistance to the downy mildew agent Plasmopara viticola in the Georgian Vitis vinifera germplasm

S.L. Toffolatti
;
G. Maddalena
Secondo
;
D. Salomoni;P.A. Bianco
Penultimo
;
O. Failla
Ultimo
2016

Abstract

Grapevine downy mildew, caused by Plasmopara viticola, is one of the most important diseases at the international level. The mainly cultivated Vitis vinifera varieties are generally fully susceptible to P. viticola, but little information is available on the less common germplasm. The V. vinifera germplasm of Georgia (Caucasus) is characterized by a high genetic diversity and it is different from the main European cultivars. Aim of the study is finding possible sources of resistance in the Georgian autochthonous varieties available in a field collection in northern Italy. The resistance levels to P. viticola were estimated both by experimental inoculations and by disease assessment in field conditions in a multi-year activity. Of the 93 tested accessions, 'Mgaloblishvili N' showed a constant resistant behaviour, by reducing the disease severity and the pathogen sporulation. High levels of leaf hair density did not always associate with reduced disease gravity in experimental inoculations, confirming that this kind of preformed barrier is not completely efficient in preventing pathogen infections.
Disease incidence; Disease resistance; Grapevine; Genetics; Horticulture
Settore AGR/12 - Patologia Vegetale
Article (author)
File in questo prodotto:
File Dimensione Formato  
Toffolatti 16, Vitis.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 853.42 kB
Formato Adobe PDF
853.42 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

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/2434/467991
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 25
social impact