Impact of pathogen genetics on breeding for resistance to sugarcane diseases

Rott Philippe, Girard Jean-Claude, Comstock Jack C.. 2013. Impact of pathogen genetics on breeding for resistance to sugarcane diseases. In : Proceedings of the XXVIII ISSCT (International Society of Sugar Cane Technologists) Congress, São Paulo, Brazil 2013 june 24-27. Brazilian Society of Sugar and Ethanol Technologists (STAB) ; XXVIIIth ISSCT Organising Committee. s.l. : D.M. HOGARTH, Résumé, 10. ISBN 978-0-949678-27-0 ISSCT Congress. 28, São Paulo, Brésil, 24 Juin 2013/27 Juin 2013.

Titre français : Impact de la genetique des agents pathogenes sur l'amelioration varietale de la canne a sucre pour la resistance aux maladies / Titre espagnol : Impato de la genetica de los patogenos en la seleccion de la resistencia contra enfermedades de la cana de azucar / Titre portugais : Impacto da genetica de patogenos no melhoramento para resistencia a doenças da cana-de-acucar

Matériel d'accompagnement : 1 Communication complète

Résumé : Diseases are limiting factors of sugarcane production and breeding for resistance to diseases is a major goal in sugarcane variety improvement. Diseases result from complex interactions between plants, pathogens and environment, including humans and insect vectors of pathogens. History has shown that durability of resistance of sugarcane to diseases varies according to the host cultivar and to the pathogen in a given environment. Some sugarcane cultivars have been grown for decades without losing efficiency of resistance to the disease they were bred or screened for; others became susceptible and showed disease symptoms rapidly after being grown commercially. Disease outbreaks and breakdown or overcoming of plant resistance suggesting changes in the pathogen populations have been observed for several sugarcane diseases. Emergence of new pathogens or new strains of a pathogen generally results in a change of the varieties grown in a sugarcane growing area. Pathogen population genetics must therefore be taken into consideration for breeding and screening new sugarcane varieties for resistance to diseases. Knowing the genetic diversity of a pathogen in a given location is very important, especially when plants are artificially inoculated with pathogens for screening. Furthermore, sugarcane genetics is very complex and few disease specific resistance genes have been identified so far, and selection for these traits is also complex. Sequencing and analysis of genome variation of sugarcane pathogens varying in virulence should result, in the future, in the identification and comprehension of the molecular determinants involved in these genetic changes, and subsequently also facilitate breeding for resistance.

Classification Agris : H20 - Maladies des plantes
F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Rott Philippe, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0001-6085-6159
• Girard Jean-Claude, CIRAD-BIOS-UMR BGPI (FRA)
• Comstock Jack C., USDA (USA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570785/)

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