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 Sebastien. 2022. Detection of dynamic QTLs for traits related to organoleptic quality during banana ripening. . ISHS. Angers : ISHS, 1 p International Horticultural Congress (IHC 2022). 31, Angers, France, 14 Août 2022/20 Août 2022.

Matériel d'accompagnement : 1 résumé

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 co-localizations, 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 (R 2 = 19.3n50.6%) 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 libres : Dry matter content, Organoleptic banana quality, Musa, Pulp acidity, Dynamic QTL

Auteurs et affiliations

• Biabiany Stella, CIRAD-BIOS-UMR AGAP (FRA)
• 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 Sebastien, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7189-9592

Source : Cirad-Agritrop (https://agritrop.cirad.fr/602394/)

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