Mahé Laetitia auteur aut IRD Varzea V.M.P. auteur aut IRD Le Pierrès Daniel auteur aut IRD Combes Marie-Christine auteur aut IRD Lashermes Philippe auteur aut IRD text journalArticle eng text/pdf born digital access The development of cultivars resistant to coffee leaf rust caused by the fungal pathogen Hemileia vastatrix is a priority in coffee breeding. However, only very few descendants of interspecific hybrids between Coffea arabica and diploid relative species have been used as resistance source. Identification of new sources of resistance appeared therefore particularly worthwhile. Hybrid plants derived from interspecific hybridization between C. arabica and Coffea canephora and found in neo-natural coffee tree populations of New Caledonia were therefore investigated. Amplified Fragment Length Polymorphism and micro-satellites amplification were used to evaluate the genetic diversity of 14 hybrid plants, and rust resistance was evaluated by inoculation with a panel of rust races representing a large variability in virulence. An important genetic diversity was characterized in hybrid plants originating from introgressions into C. arabica from various C. canephora progenitors. On the 14 plants tested for leaf rust resistance, eight appeared resistant to all races investigated. Such plant material should represent a highly valuable resource for C. arabica breeding against coffee leaf rust. specialized Coffea arabica Hemileia vastatrix resistance genetic resources diversity molecular marker New Caledonia breeding 076 126 6 638-641 2007 0179-9541 https://www.documentation.ird.fr/hor/fdi:010040903 10.1111/j.1439-0523.2007.01413.x 0179-9541 [F B010040903] https://www.documentation.ird.fr/hor/fdi:010040903 https://www.documentation.ird.fr/intranet/publi/2008/01/010040903.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-02-22 2017-08-23 fdi:010040903 fre