Herrera P. J. C. auteur aut IRD Alvarado A. V. auteur aut IRD Cortina G. H. A. auteur aut IRD Combes Marie-Christine auteur aut IRD Romero G. G. auteur aut IRD Lashermes Philippe auteur aut IRD text journalArticle eng text/pdf born digital access The objective of this study was to identify polymorphic molecular markers associated with partial resistance to coffee leaf rust, Hemileia vastarix. A segregating F (2) population derived from a cross between the susceptible Coffea arabica cv. Caturra and a C. canephora-introgressed Arabica line exhibiting high partial resistance was analyzed. Rust resistance measured as rust incidence (RI) and defoliation (DEF) was evaluated in field conditions in three consecutive years (2003-2005). During the 2003 season, which was characterized by favorable conditions for a rust epidemic, the F (2) plants exhibited different levels of resistance ranging from very susceptible (50.1% for DEF and 49.5% for RI) to highly partial resistance (9.1% for DEF and 3.7% for RI). Molecular analysis enabled identification of seven polymorphic markers (5 AFLP and 2 SSR) exhibiting significant association with partial resistance. Coexistence of resistance homozygous alleles (RR) at codominant SSR loci was correlated with high resistance. This study is the first attempt to develop PCR-based sequence specific markers linked to partial rust resistance in coffee. specialized Coffea arabica Hemileia vastatrix Orange leaf rust Partial resistance Molecular markers 076 167 1 57-67 2009 0014-2336 https://www.documentation.ird.fr/hor/fdi:010046005 10.1007/s10681-008-9860-9 0014-2336 [F B010046005] https://www.documentation.ird.fr/hor/fdi:010046005 https://www.documentation.ird.fr/intranet/publi/2009/04/010046005.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-05-13 2017-08-23 fdi:010046005 fre