BERNARD, Anthony; CRABIER, Julie; DONKPEGAN, Armel; MARRANO, Annarita; LHEUREUX, Fabrice; DIRLEWANGER, Elisabeth

doi:10.3389/fpls.2020.607213

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BERNARD, Anthony
Biologie du fruit et pathologie [BFP]

CRABIER, Julie
Biologie du fruit et pathologie [BFP]

DONKPEGAN, Armel
Biologie du fruit et pathologie [BFP]

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Article de revue

Ce document a été publié dans

Frontiers in Plant Science. 2021, vol. 11, p. 607213

Frontiers

Résumé en anglais

Elucidating the genetic determinants of fruit quality traits in walnut is essential to breed new cultivars meeting the producers and consumers’ needs. We conducted a genome-wide association study (GWAS) using multi-locus models in a panel of 170 accessions of Juglans regia from the INRAE walnut germplasm collection, previously genotyped using the AxiomTM J. regia 700K SNP array. We phenotyped the panel for 25 fruit traits related to morphometrics, shape, volume, weight, ease of cracking, and nutritional composition. We found more than 60 marker-trait associations (MTAs), including a highly significant SNP associated with nut face diameter, nut volume and kernel volume on chromosome 14, and 5 additional associations were detected for walnut weight. We proposed several candidate genes involved in nut characteristics, such as a gene coding for a beta-galactosidase linked to several size-related traits and known to be involved in fruit development in other species. We also confirmed associations on chromosomes 5 and 11 with nut suture strength, recently reported by the University of California, Davis. Our results enhance knowledge of the genetic control of important agronomic traits related to fruit quality in walnut, and pave the way for the development of molecular markers for future assisted selection.< Réduire

Mots clés

arbre fruitier

Fruit à coque

Mots clés en anglais

texture analyzer

gas chromatography

HPLC

X-ray CT

fruit traits

GWAS

Juglans regia L.

walnut

DOI

http://dx.doi.org/10.3389/fpls.2020.607213

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Biologie du Fruit & Pathologie (BFP) - UMR 1332