Combining ability of banana triploid hybrid progenitors and genomic prediction of cross performance for agro-morphological traits

Toniutti Lucile, Rio Simon, Madec Camille, Ricci Sebastien, Guiougou Chantal, Marius Franck, Mina Claude, Delos Jean-Marie Eric, Lambert Frédéric, Efile Jean-Claude, D'Hont Angélique, Martin Guillaume, Hoarau Jean-Yves, Salmon Frédéric. 2025. Combining ability of banana triploid hybrid progenitors and genomic prediction of cross performance for agro-morphological traits. Genetics, 16 p.

Url - jeu de données - Dataverse Cirad : https://doi.org/10.18167/DVN1/YSM8R7 / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/sra/?term=PRJNA1252056

Résumé : Breeding disease-resistant cultivars that meet commercial criteria is essential to sustain banana production threatened by major diseases. Edible bananas are seedless triploid hybrids that represent end-breeding products. Hence, the crucial step in banana breeding is to improve and combine the parents. Currently, little information is available on parental combining abilities and on the inheritance of major traits to effectively guide banana breeding strategies. In this study, a breeding population of 2,723 triploid individuals resulting from multiparental diploid-tetraploid crosses was characterized during three crop cycles for 23 traits relating to plant and fruit architecture and bunch yield components. The phenotypic variance was partitioned between non-genetic and genetic effects, the latter including the general combining ability of diploid and tetraploid parents, their specific combining ability, and additional variance due to the within-cross genetic variability. Heritability was moderate to high depending on the trait and revealed the predominance of the tetraploid parent's contribution to hybrid performance for most traits. The use of parental genomic information enabled cross-mean performance prediction through genomic relationship matrices of general and specific combining abilities, the latter being partitioned into dominance and across-population epistasis contributions. Predictive abilities often greater than 0.5 were obtained, particularly when the tetraploid parent was observed in other crosses and, for some traits, when neither parent was observed. Information on trait inheritance and genomic prediction of cross-mean performance will help in selecting and combining parents, facilitating the identification of promising hybrids.

Mots-clés Agrovoc : amélioration des plantes, hybride, aptitude à la combinaison, sélection, Musa acuminata, amélioration génétique, génome, héritabilité, tétraploïdie, génomique, variation génétique, Musa, phénotype

Mots-clés géographiques Agrovoc : Guadeloupe

Mots-clés libres : Musa acuminata, Heritability, General combining ability, Genomic prediction, Breeding

Agences de financement européennes : European Commission, European Agricultural Fund for Rural Development

Agences de financement hors UE : Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Région Guadeloupe

Projets sur financement : (FRA) Organisation et montée en puissance d'une Infrastructure Nationale de Génomique

Auteurs et affiliations

• Toniutti Lucile, CIRAD-BIOS-UMR AGAP (GLP) - auteur correspondant
• Rio Simon, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7014-8789
• Madec Camille
• Ricci Sebastien, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-7189-9592
• Guiougou Chantal, CIRAD-BIOS-UMR AGAP (GLP)
• Marius Franck, CIRAD-BIOS-UMR AGAP (GLP)
• Mina Claude, CIRAD-BIOS-UMR AGAP (GLP)
• Delos Jean-Marie Eric, CIRAD-BIOS-UMR AGAP (GLP)
• Lambert Frédéric, CIRAD-BIOS-UMR AGAP (GLP)
• Efile Jean-Claude, CIRAD-BIOS-UMR AGAP (GLP)
• D'Hont Angélique, CIRAD-BIOS-UMR AGAP (FRA)
• Martin Guillaume, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-1801-7500
• Hoarau Jean-Yves, CIRAD-BIOS-UMR AGAP (REU) ORCID: 0000-0001-9734-4165
• Salmon Frédéric, CIRAD-BIOS-UMR AGAP (GLP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/613974/)

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