The <i>Vitis vinifera</i> x <i>V. rotundifolia</i> hybrids as phylloxera resistant rootstocks

Authors

  • U. X. Davidis Department of Viticulture and Enology, University of California, Davis, California
  • H. P. Olmo Department of Viticulture and Enology, University of California, Davis, California

DOI:

https://doi.org/10.5073/vitis.1964.4.129-143

Abstract

  1. In greenhouse and field tests of rooted vines and seedlings, a considerable number of vinifera X rotundifolia F1 hybrid clones exhibit high tolerance or immunity to the root form of phylloxera, as judged by the formatirm of lesions or the insects found lodged on the roots.
  2. The formation of root lesions is related to the anatomical structure, the more closely it resembles the rotundifolia, the fewer and smaller the lesions.
  3. Phylloxera samples from five different areas in California have not been found to differ in gross morphology or in their reaction to the VR hybrids.
  4. The species rotundifolia contributes genes exhibiting considerable dominance for resistance in the F1 generation.
  5. Unlike the rotundifolia parent, the VR hybrids can be successfully used as rootstocks for vinifera grapes, although observations are only for eight years and hence preliminary.
  6. Although the VR hybrids are less easy to propagate than many common rootstocks, the variation is great enough between clones to permit selection.

Downloads

Published

2017-02-22

Issue

Vol. 4 No. 2 (1964): Vitis

Section

Article

License

The content of VITIS is published under a Creative Commons Attribution 4.0 license. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and any changes to the original are clearly labeled. We do not prohibit or charge a fee for reuse of published content. The use of general descriptive names, trade names, trademarks, and so forth in any publication herein, even if not specifically indicated, does not imply that these names are not protected by the relevant laws and regulations. The submitting author agrees to these terms on behalf of all co-authors when submitting a manuscript. Please be aware that this license cannot be revoked. All authors retain the copyright on their work and are able to enter into separate, additional contractual arrangements.