Assessment of the variability for resistance to powdery mildew in grapevine germplasm from La Rioja

  1. Hernández, M.M. 1
  2. Pérez-Moreno, I. 1
  3. Martínez de Toda, F. 1
  4. Menéndez, C.M. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Revista:
Acta Horticulturae

ISSN: 0567-7572

Año de publicación: 2009

Volumen: 827

Número: 827

Páginas: 571-574

Tipo: Artículo

Otras publicaciones en: Acta Horticulturae

Resumen

Fungal diseases such as powdery mildew are a major problem in grapevine cultivation worldwide. Although many American species are resistant to powdery mildew, most resistances are quantitative and have been difficult to introduce in European cultivars, due to the difficulty in selecting for both resistance and berry quality traits. European grapevine is susceptible to the disease, but European varieties show important differences with regard to the degree of tolerance. Conservation and characterization of local grapevine varieties are becoming important issues, as the importance of preserving genetic variability for agronomic traits and for resistances to biotic and abiotic stresses has been realized. A germplasm collection has been established in Rioja, Spain. Seven minor varieties together with 'Grenache' and 'Carignan', have been evaluated for the degree of tolerance against the fungus using a whole leaf assay in the lab. The quantification of the response to powdery mildew infection could allow the identification of natural sources of tolerance to the disease within V. vinifera germplasm.