QTL detection for fruit commercial quality traits in diploid and triploid banana populations
Abstract
Desert bananas (Musa spp.) are a major fruit crop worldwide for which postharvest quality traits are major determinants for consumer acceptance and adoption of new cultivars. They are thus important targeted traits in breeding yet their genetic basis remains poorly characterized. We report the first QTL mapping study of two of these quality traits, finger drop resistance and bruising susceptibility, using two biparental populations sharing the same genetic background but differing in ploidy level: a diploid Pisang Madu × Galéo population and a triploid Pisang Madu T × Galéo population. For finger drop, heritability reached 0.47 in diploids and 0.38 in triploids. Two significant QTLs, q1_FD_M7-1 and q2_FD_M11, were detected in the diploid population and together explained 28.12% of the phenotypic variance. q1_FD_M7-1 was located in a non-recombining chromosomal region associated with a reciprocal translocation in Pisang Madu. Candidate genes co-localizing with finger drop QTLs included expansins, xyloglucan endotransglucosylases, and pectin methylesterases involved in cell wall remodeling. For bruising susceptibility, heritability was higher in triploids (0.57) than in diploids (0.48). One QTL and one putative QTL detected in the triploid population together explained 28.78% of the phenotypic variance. Cross-ploidy validation showed moderate predictive ability of QTL-based models between populations, with prediction accuracies of 0.52 for finger drop and 0.42 for bruising susceptibility. These QTLs are promising targets for marker-assisted selection to accelerate the development of new desert banana cultivars which are urgently needed to diversify the current production mainly based on monoculture of Cavendish.
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BibTeX
@article{aresi2026detection,
title = {{QTL detection for fruit commercial quality traits in diploid and triploid banana populations}},
author = {Margot Aresi and Stella Biabiany and Guillaume Martin and Gersende Pressat and Sébastien Ricci and Frédéric Lambert and Frédéric Salmon and Chantal Guiougou and Angélique D'Hont and Mathieu Léchaudel and Lucile Toniutti},
journal = {Euphytica},
year = {2026},
month = sep,
doi = {10.1007/s10681-026-03796-5},
url = {https://hal.inrae.fr/hal-05761601v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - QTL detection for fruit commercial quality traits in diploid and triploid banana populations
AU - Margot Aresi
AU - Stella Biabiany
AU - Guillaume Martin
AU - Gersende Pressat
AU - Sébastien Ricci
AU - Frédéric Lambert
AU - Frédéric Salmon
AU - Chantal Guiougou
AU - Angélique D'Hont
AU - Mathieu Léchaudel
AU - Lucile Toniutti
PY - 2026
DA - 2026/09/11
JO - Euphytica
DO - 10.1007/s10681-026-03796-5
UR - https://hal.inrae.fr/hal-05761601v1
AB - Desert bananas (Musa spp.) are a major fruit crop worldwide for which postharvest quality traits are major determinants for consumer acceptance and adoption of new cultivars. They are thus important targeted traits in breeding yet their genetic basis remains poorly characterized. We report the first QTL mapping study of two of these quality traits, finger drop resistance and bruising susceptibility, using two biparental populations sharing the same genetic background but differing in ploidy level: a diploid Pisang Madu × Galéo population and a triploid Pisang Madu T × Galéo population. For finger drop, heritability reached 0.47 in diploids and 0.38 in triploids. Two significant QTLs, q1_FD_M7-1 and q2_FD_M11, were detected in the diploid population and together explained 28.12% of the phenotypic variance. q1_FD_M7-1 was located in a non-recombining chromosomal region associated with a reciprocal translocation in Pisang Madu. Candidate genes co-localizing with finger drop QTLs included expansins, xyloglucan endotransglucosylases, and pectin methylesterases involved in cell wall remodeling. For bruising susceptibility, heritability was higher in triploids (0.57) than in diploids (0.48). One QTL and one putative QTL detected in the triploid population together explained 28.78% of the phenotypic variance. Cross-ploidy validation showed moderate predictive ability of QTL-based models between populations, with prediction accuracies of 0.52 for finger drop and 0.42 for bruising susceptibility. These QTLs are promising targets for marker-assisted selection to accelerate the development of new desert banana cultivars which are urgently needed to diversify the current production mainly based on monoculture of Cavendish.
SN - 0014-2336
SN - 1573-5060
ER -