Quantitative trait loci for sorghum grain morphology and quality traits: Toward breeding for a traditional food preparation of West-Africa

Guindo Diarah, Témé Niaba, Vaksmann Michel, Doumbia Mohamed, Vilmus Ingrid, Guitton Baptiste, Sissoko Aliou, Mestres Christian, Davrieux Fabrice, Fliedel Geneviève, Kouressy Mamoutou, Courtois Brigitte, Rami Jean-François. 2019. Quantitative trait loci for sorghum grain morphology and quality traits: Toward breeding for a traditional food preparation of West-Africa. Journal of Cereal Science, 85 : 256-272.

Quartile : Q2, Sujet : FOOD SCIENCE & TECHNOLOGY

Résumé : One of the most frequently consumed sorghum food in Mali is a thick porridge, known as tô. Many grain traits contribute to its firmness and color, which are the most important qualities for consumers. These traits are related to chemical composition, physical properties, but also grain size, shape, glume adherence and color, pericarp thickness, or the presence of a testa. Quantitative trait loci for tô consistency, tô color, 16 grain traits, as well as day to flowering and grain yield, were investigated in two elite breeding populations, involved in a marker assisted selection program. A total of 51 and 71 QTLs were detected for P114 and P118, respectively. Several QTLs with high R2 corresponded to major genes segregating in the populations such as the Z gene for pericarp thickness, the B2 and B1 genes for testa presence, the P gene for anthocyanin, and a QTL for flowering time. Many QTLs with moderate effect were detected for grain attributes associated to tô quality, without showing antagonism between grain quality and yield. The results of this study will contribute to producing new varieties combining grain productivity and grain quality favorable alleles, through the use of marker assisted selection.

Mots-clés Agrovoc : Sorghum bicolor, sorgho en grain, amélioration génétique, qualité des aliments, locus des caractères quantitatifs

Mots-clés géographiques Agrovoc : Mali, Afrique occidentale

Classification Agris : F30 - Génétique et amélioration des plantes
Q01 - Sciences et technologies alimentaires - Considérations générales

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Guindo Diarah, CIRAD-BIOS-UMR AGAP (FRA)
• Témé Niaba, IER (MLI)
• Vaksmann Michel, CIRAD-BIOS-UMR AGAP (MLI) ORCID: 0000-0002-5258-1279
• Doumbia Mohamed, IER (MLI)
• Vilmus Ingrid, Université de Montpellier (FRA)
• Guitton Baptiste, CIRAD-BIOS-UMR AGAP (FRA)
• Sissoko Aliou, IER (MLI)
• Mestres Christian, CIRAD-PERSYST-UMR Qualisud (FRA)
• Davrieux Fabrice, CIRAD-PERSYST-UMR Qualisud (REU)
• Fliedel Geneviève, CIRAD-PERSYST-UMR Qualisud (FRA)
• Kouressy Mamoutou, IER (MLI)
• Courtois Brigitte, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-2118-7102
• Rami Jean-François, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-5679-3877 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/590108/)

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