Introgression of QTLs for anthracnose resistance (Colletotrichum sublineolum) in an elite sorghum variety from Mali

Traoré dite Diop Aiché, Dagnon Karim, Vaksmann Michel, Doumbia Mohamed, De Bellis Fabien, Calatayud Caroline, Sissoko Aliou, Diakité Mahamadou, Diallo Abdoulaye. 2023. Introgression of QTLs for anthracnose resistance (Colletotrichum sublineolum) in an elite sorghum variety from Mali. In : Sorghum in the 21th century: Resiliency and Sustainability in the Face of Climate Change. Book of Abstracts. CIRAD, Kansas State University, Sorghum International Development, IRD, CERAAS. Montpellier : CIRAD-Kansas State University, Résumé, p. 274. Sorghum in the 21st Century, Global Sorghum Conference, Montpellier, France, 5 Juin 2023/9 Juin 2023.

Résumé : Sorghum (Sorghum bicolor), the fifth most cultivated cereal in the world, ensures food security for millions of people in Africa. Anthracnose (Colletotrichum sublineolum) is one of the most important disease in sorghum production areas in Mali. Anthracnose causes premature drying and defoliation resulting in low grain yield. The objective of this study is to improve sorghum resistance to anthracnose by introgressing resistance QTLs into an elite Malian sorghum variety. Study was conducted at the Sotuba station. Pathogen source consisted of C. sublineolum strains collected in the major sorghum production zones in Mali (Kita, Bougouni, Longorola, Farako, N'tarla, Signé, sirakelé, Bla and Cinzana). Tiandougou Coura, a highly susceptible to anthracnose Malian elite variety was used as a recurrent parent and three varieties (B35, Grinkan and E36-1) were use as donor for resistance to anthracnose. The QTLs were introgressed by molecular marker-assisted backcrossing method in order to obtain three BC3F3 populations (one population per donor parent). Population development was also accelerated by forcing floral initiation to allow the development of three generations per year. The BC3F4 plants are currently being phenotyped for anthrachnose resistance, yield traits, stover and grain quality.

Auteurs et affiliations

• Traoré dite Diop Aiché, IER (MLI)
• Dagnon Karim, IER (MLI)
• Vaksmann Michel, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-5258-1279 - auteur correspondant
• Doumbia Mohamed, CIRAD-BIOS-UMR AGAP (FRA)
• De Bellis Fabien, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7070-7691
• Calatayud Caroline, CIRAD-BIOS-UMR AGAP (FRA)
• Sissoko Aliou, IER (MLI)
• Diakité Mahamadou, IER (MLI)
• Diallo Abdoulaye, IER (MLI)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/609428/)

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