Genome-wide association mapping of date palm fruit traits

Hazzouri Khaled M., Gros-Balthazard Muriel, Flowers Jonathan M., Copetti Dario, Lemansour Alain, Lebrun Marc, Masmoudi Khaled, Ferrand Sylvie, Dhar Michael I., Fresquez Zoë A., Rosas Ulises, Zhang Jianwei, Talag Jayson, Lee Seunghee, Kudrna Dave, Powell Robyn F., Leitch Ilia J., Krueger Robert, Wing Rod A., Amiri Khaled M. A., Purugganan Michael D.. 2019. Genome-wide association mapping of date palm fruit traits. Nature Communications, 10 (1):4680, 14 p.

Url - éditeur : https://rdcu.be/b9qQQ

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Date palms (Phoenix dactylifera) are an important fruit crop of arid regions of the Middle East and North Africa. Despite its importance, few genomic resources exist for date palms, hampering evolutionary genomic studies of this perennial species. Here we report an improved long-read genome assembly for P. dactylifera that is 772.3 Mb in length, with contig N50 of 897.2 Kb, and use this to perform genome-wide association studies (GWAS) of the sex determining region and 21 fruit traits. We find a fruit color GWAS at the R2R3-MYB transcription factor VIRESCENS gene and identify functional alleles that include a retrotransposon insertion and start codon mutation. We also find a GWAS peak for sugar composition spanning deletion polymorphisms in multiple linked invertase genes. MYB transcription factors and invertase are implicated in fruit color and sugar composition in other crops, demonstrating the importance of parallel evolution in the evolutionary diversification of domesticated species.

Mots-clés Agrovoc : Phoenix dactylifera, gène, séquence d'adn, variation génétique, teneur en glucides, couleur, fruit (botanique), locus, détermination du sexe

Mots-clés libres : Agricultural genetics, Evolutionary genetics, Genetic variation, Natural variation in plants

Classification Agris : F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Auteurs et affiliations

• Hazzouri Khaled M., New York University Abu Dhabi (ARE)
• Gros-Balthazard Muriel, New York University Abu Dhabi (ARE)
• Flowers Jonathan M., New York University Abu Dhabi (ARE)
• Copetti Dario, University of Arizona (USA)
• Lemansour Alain, Date palm Research Center (SAU)
• Lebrun Marc, CIRAD-PERSYST-UMR Qualisud (FRA)
• Masmoudi Khaled, UAE University (ARE)
• Ferrand Sylvie, New York University Abu Dhabi (ARE)
• Dhar Michael I., New York University Abu Dhabi (ARE)
• Fresquez Zoë A., New York University Abu Dhabi (ARE)
• Rosas Ulises, New York University Abu Dhabi (ARE)
• Zhang Jianwei, University of Arizona (USA)
• Talag Jayson, University of Arizona (USA)
• Lee Seunghee, University of Arizona (USA)
• Kudrna Dave, University of Arizona (USA)
• Powell Robyn F., Royal Botanic Gardens (GBR)
• Leitch Ilia J., Royal Botanic Gardens (GBR)
• Krueger Robert, USDA (USA)
• Wing Rod A., University of Arizona (USA)
• Amiri Khaled M. A., UAE University (ARE) - auteur correspondant
• Purugganan Michael D., New York University Abu Dhabi (ARE) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596866/)

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