S01 - Session O10 - INRAE & NOVADI collaboration: evolution of the partnership over 30 years to remain at the forefront of breeding

Authors: David Ray *, Clarisse Auvinet, François Lebreton, Christelle Pitiot, Aurélien Petiteau, François Laurens, Bernard Petit

Agricultural production losses due to pests and diseases account for nearly 40% of the world production. In apple, all major commercial varieties are susceptible to one fungal disease: scab. To address this issue, INRAE and NOVADI have jointly developed a breeding program in which each organization provides its expertise: pre-breeding handled by INRAE, followed by breeding and management of varieties by NOVADI. This collaboration of more than 30 years between a public institute and a private company favors interactions, as well as skills and knowledge transfer to the profession. Our co-program focuses on improving agronomic, organoleptic and commercial qualities, with a strong emphasis on resistance to pests and diseases such as scab, powdery mildew, fire blight, aphids and European canker. After several years of phenotyping prospective crosses, we have built a solid database of our different selections' characteristics. Thereafter, we have continued to optimize our selection procedure thanks to the contribution of apple genome sequencing, evolution of genotyping techniques, and availability of new genetic markers such as SNPs. Nowadays, we work on a two-level strategy: 1) pedigree analysis of progenitors to provide genetic information complementary to phenotyping, and 2) routine application of marker-assisted breeding (MAB) to increase the efficiency of resistance gene accumulation. Afterward, each variety must fit into the world apple landscape. To this end, NOVADI has developed strategic relationships to test and select hybrids adapted to various pedoclimatic conditions. Several of our novelties are significantly established on the market, proof of the adequacy between the relevance of the varieties and needs of the sector. Resilience of these new varieties, particularly in the face of climate change, is now a major challenge for which our partnership shall demonstrate its effectiveness. MAB could prove to be an important tool to quickly identify selections that meet this global issue.