title: How Did Host Domestication Modify Life History Traits of Its Pathogens?
abstract: Understanding evolutionary dynamics of pathogens during domestication of their hosts and rise of agro-ecosystems is essential for durable disease management. Here, we investigated changes in life-history traits of the fungal pathogen Venturia inaequalis during domestication of the apple. Life traits linked to fungal dispersal were compared between 60 strains that were sampled in domestic and wild habitats in Kazakhstan, the center of origin of both host and pathogen. Our two main findings are that transition from wild to agro-ecosystems was associated with an increase of both spore size and sporulation capacity; and that distribution of quantitative traits of the domestic population mostly overlapped with those of the wild population. Our results suggest that apple domestication had a considerable impact on fungal characters linked to its dispersal through selection from standing phenotypic diversity. We showed that pestification of V. inaequalis in orchards led to an enhanced allocation in colonization ability from standing variation in the wild area. This study emphasizes the potential threat that pathogenic fungal populations living in wild environments represent for durability of resistance in agro-ecosystems.
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Marie
authors.initials: M
authors.lastname: De Gracia
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Mathilde
authors.initials: M
authors.lastname: Cascales
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Pascale
authors.initials: P
authors.lastname: Expert
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Marie-Noelle
authors.initials: MN
authors.lastname: Bellanger
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Le Cam
authors.affiliation: INRA, IRHS, SFR QUASAV, Beaucouzé, 49071, France; Université d'Angers, IRHS, PRES UNAM, SFR QUASAV, Angers, 49045, France; Agrocampus Ouest, IRHS, SFR QUASAV, Angers, 49045, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Lemaire
mesh_terms: D005075:Biological Evolution; D017753:Ecosystem; D054884:Host-Pathogen Interactions; D027845:Malus; D010641:Phenotype; D010935:Plant Diseases / Q000382:microbiology; D019655:Quantitative Trait, Heritable