Recent results in vine improvement regarding its resistance to downy and powdery mildews
AbstractResistance to mildew remains very important under Portuguese conditions and induced mutations present a great interest to obtain it.
γ -rays irradiation was applied to woody material and X-ray was used on in vitro cultures of stem apexes and leaf explants. After doses up to 2000 rad, two resistant mutants were selected: with γ -rays, the resistance being expressed as surrounding necrotic patches; with X-rays, the plant coming out from in vitro culture presented small necrotic patches.
Concerning powdery mildew, we are developing new techniques for laboratorial inoculation, including a technique for sowing isolated spores. By using these, we can conduct studies on morphology and biology of the isolated colony, variability of the resistance within the rids varieties and genetic variability of the parasite. Some results concerning these areas are presented.
This work is licensed under a Creative Commons Attribution 4.0 International 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.