Overall objective of the project:
The development of new grapevine varieties with a complete or most extensive resistance to the viticulturally important fungus diseases (Plasmopara, oidium, botrytis) reduces considerably the plant protection measures and contributes thus to an ecologically beneficial viticulture. To improve breeding efficiency, the elaborated new methods and procedures are incorporated. Newly developed promising grapevine varieties are officially tested in cooperation with the Federal Variety Office (plant protection, variety list) and the practical viticulture for their suitability.
Overall objective of the project:
Fungus resistant newbreds are predestined for environmentally friendly viticulture. In a test plot, fungus resistant newbreds and breeding strains are comparatively grown with traditional varieties according to organic viticulture guidelines (ECOVIN). These tests provide early information about the ecovariance of the breeding material. The test plot will be available for investigations of the population dynamics of beneficial and damaging organisms in comparison of fungus resistant traditional varieties.
Overall objective of the project:
Visual pre-selected individual clones of fungus-resistant new varieties are subjected to phytosanitary tests mainly for virus diseases. Plants which prove to be pathogen-free, are used for establishing progagation plots. In parallel these clones were transferred in vitro which excludes a re-infection and enables a rapid propagation of healthy plant material in case of necessity. Activities are focused on the newbred Regent, which is in the meantime highly accepted by growers and further on three new breeding lines, which are applied for variety protections.
Overall objective of the project:
The institutes large grapevine field collection is evaluated as to the important characteristics for breeding purposes. At present, priority is given to the viticulturally important fungus diseases. To ascertain the degree of infection by mildew diseases mainly field evaluations are carried out. In parallel, evaluation by literature of important characteristics of cultivars is carried out. The results of variety resistance to fungus diseases are gathered and published. These information are available via Internet.
Overall objective of the project:
Compilation of viticultural institutions (worldwide) with grapevine collections. Furthermore, addresses, geographic sites, climatic data, composition of the grapevine collections, conservation methods, etc. are specified. More than 16000 cvs. are registered in the database for grapevine at our Institute and are provided with the IPGRI-passport data, being continuously updated. Our collection comprises approx. 2500 genotypes. In parallel, important cultivars or strains are in vitro cultivated. A further extension takes into account above all genotypes with important breeding traits.
Overall objective of the project:
The Vitis International Variety Catalogue comprises about 22.000 Vitis-species, grapevine varieties and important breeding lines. Internet users have access to variety-specific IPGRI-passport data, morphological descriptor data, results of evaluation (secondary descriptor data), pictures of ampelographical important plant organs and bibliography. High and increasing use of the database can be stated. Thus the database input is kept up to date and it is anticipated to extend the presentation, adding modules for the generation of pedigrees of simple and multiple crossings, the presentation of SSR-marker data and in a long term the availability of variety-specific publications.
Overall objective of the project:
Particularly in Germany various influences and incidents lead to a reduction of genetic diversity of grapevine varieties. It is aimed to rediscover and to preserve old robust grapevine varieties for present and future use. In 2000, a 100-year old vineyard was discovered in the vinegrowing area Badische Bergstraße. In 1001 and 2002, three further 80- to 200 year old vineyards were found. In total, the four vineyards comprise about 1500 vines. At least 52 different grapevine varieties were identified. The inventory has been completed, while the identification of the unknown varieties is still underway. SSR-marker results confirmed the presumed grapevine variety identities. A real surprise was the rediscovery of "Weißer Heunisch". Measures for the preservation of the old grapevine varieties have been undertaken.
Overall objective of the project:
In international grapevine collections about 5 to 10 % of the grapevine varieties are not true-to-type. Material transfer between grapevine collections lead to a proliferation of mistakes. Research work, breeding tasks, preservation of genetic resources and practical viticulture need reliable information on variety identity. It is aimed to establish a reference database for the 3000 accessions comprising the grapevine collection of the Institute for Grapevine Breeding Geilweilerhof. For all the accessions an identification profile will be made with descriptor data, SSR-marker data, pictures and herbarium material.