Présentation of the research actions driven at the national level:
A) Health and pests/diseases of seed potatoes:
Characterization of potato diseases.
Developpement of tools for the detection and quantification of pathogens
Epidemiological studies on the survival, transmission and developpement of diseases
Design and evaluation of preventive and control strategies
1• Potato viruses :
2• Bacteria (blackleg, brown rot, ring rot):
3• Nématodes (potato cyst nematodes and root-knot nemathodes):
4• Potato tuber blemishes:
B) Genetics and varietal innovation:
Tools for potato breeding: Markers-Assisted Selection for diseases resistance.
Characterization of genetic ressources.
Genetic fingerprints of potato cultivars: fiche identification.pdf
Research programmes are driven to support the breeding of new potato cultivars. To be specifically adapted to the various market sectors, new cultivars need to combine multiple criteria: productivity, earliness, quality of tubers presentation , cooking and processing qualities , adaptation to agrometeorological areas, disease resistances, ect...
In a context of limitation of inputs, research is focused on the breeding material presenting resistance to diseases. We are working for the better characterization of genetic resources used by the breeders. Moreover, we want to increase the use of molecular tools and strategies to speed up the introgression of candidate genes, in particular genes linked to the resistances against the main potato diseases (nematodes, late blight, viruses.)
Since 2008, French breeders have been using molecular markers at different steps of their breeding schemes. A molecular marker is revealed in the lab showing the presence, or the absence, of an expected character (ex: resistant or susceptible). Several thousand of tests are performed every year in the labs of Bretagne Plants, Comité Nord/Sipre and Grocep.
Advantages of Marker-Assisted-Selection (MAS)
- Avoiding difficult or expensive tests
- Early selection of promising
- Only genotypes with high potential in the field
• Reliable markers are needed
• User-friendly and (relative) high-throughput techniques for breeding stations
Figure : Molecular markers may be revealed by various ways, such as here on agarose gel (Photo S. Marhadour)
The development of markers is conducted with a narrow partnership with INRA (UMR IGEPP site of Ploudaniel). Prospects are now to validate markers linked to the resistance to the potato late blight on breeders collections to accelerate the selection of varieties requiring less pesticides, as recommended by the French national plan EcoPhyto 2018.
Contact : sylvie.marhadour_at_fnpppt.fr
C) Developing innovative techniques for the production of seed potatoes
Evaluation and transfer of innovations for the production and the protection of seed potato crops. (plantation, fertilization, irrigation, crop protection, harvesting, storage, etc.)
Link to page: Crop management / Résults here