Detection of dynamic QTLs for traits related to organoleptic quality during banana ripening

Biabiany Stella, Araou Emilie, Cormier Fabien, Martin Guillaume, Carreel Françoise, Hervouet Catherine, Salmon Frédéric, Efile Jean-Claude, Lopez-Lauri Félicie, D'Hont Angélique, Lechaudel Mathieu, Ricci Sébastien. 2022. Detection of dynamic QTLs for traits related to organoleptic quality during banana ripening. Scientia Horticulturae, 293:110690, 13 p.

Résumé : Fruit quality traits are directly linked to consumer acceptability, and thus key targets for banana breeding programs. We explored the genetic control of three major organoleptic and ripening-related traits, namely pulp acidity (pH), firmness (PF) and dry matter content (DMC), over a 7-day ripening period and three production cycles in a banana segregating population genotyped by sequencing. Significant broad-sense heritabilities were estimated with 0.77, 0.46 and 0.81 values for pH, PF and DMC, respectively. QTL detection was first performed on the whole dataset to analyze their dynamics. In a second approach, per-cycle data were considered to evaluate the stability across production cycles. Finally, a meta-analysis was performed. Various QTLs were detected, as well as many QTL colocalizations, while 12 of these QTLs were more prominent as they were detected in several approaches and/or explained over 15.0% of the phenotypic variation. Candidate genes were proposed for 10 of these QTLs. The QTL with the largest contribution to pulp acidity (R2 = 19.3–50.6%) was located on LG1_7 on the genetic map of Pisang Madu, i.e. a parent that is closely related to Cavendish, the world's most cultivated dessert banana cultivar group. This QTL is located on a chromosome derived from a reciprocal translocation that does not recombine in Pisang Madu, which is a favorable context for molecular marker monitoring. These first results will provide a relevant basis for marker-assisted selection in banana improvement programs.

Mots-clés Agrovoc : locus des caractères quantitatifs, mûrissage, propriété organoleptique, amélioration génétique, qualité des aliments, maturation après récolte

Mots-clés libres : Dry matter content, Organoleptic banana quality, Musa, Pulp acidity, Pulp firmness, Dynamic QTL

Classification Agris : Q01 - Sciences et technologies alimentaires - Considérations générales
Q02 - Traitement et conservation des produits alimentaires

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Auteurs et affiliations

• Biabiany Stella, CIRAD-BIOS-UMR AGAP (GLP)
• Araou Emilie, Université de Montpellier (FRA)
• Cormier Fabien, Université de Montpellier (FRA) ORCID: 0000-0002-7283-4616
• Martin Guillaume, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-1801-7500
• Carreel Françoise, CIRAD-BIOS-UMR AGAP (FRA)
• Hervouet Catherine, CIRAD-BIOS-UMR AGAP (FRA)
• Salmon Frédéric, CIRAD-BIOS-UMR AGAP (GLP)
• Efile Jean-Claude, CIRAD-BIOS-UMR AGAP (GLP)
• Lopez-Lauri Félicie, Université de Montpellier (FRA)
• D'Hont Angélique, CIRAD-BIOS-UMR AGAP (FRA)
• Lechaudel Mathieu, CIRAD-PERSYST-UMR Qualisud (GLP) ORCID: 0000-0002-1108-8357
• Ricci Sébastien, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0001-7189-9592 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/599514/)

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