Multivariate statistical modelling for QTL detection and marker selection in a bi-parental grapevine population - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2018

Multivariate statistical modelling for QTL detection and marker selection in a bi-parental grapevine population

Résumé

Genetic selection in grapevine and many similar species is a challenge due to their perennial status and outbred nature. Marker-assisted selection and genomic selection can hence be useful methods to ease and speed up breeding. In Coupel-Ledru et al (2014), a 191 progeny of Syrah x Grenache was phenotyped in two successive years for several ecophysiological traits under two conditions, well-watered and water deficit, on a high-throughput phenotyping platform coupled to a controlled–environment chamber. As offsprings were previously genotyped at 153 SSR markers, several QTLs were found for each trait separately, differing across years and conditions. But do these differences reflect biological processes or contrasted power between conditions? And how accurately do they allow predicting phenotypes depending on the conditions? To answer such questions, our aim is to explore the ability of sparse and regularized multivariate regression models and algorithms to select QTLs based on their predictive properties. In the present study, we perform variable selection with various flavours of the LASSO method (group Lasso, fused Lasso) adapted for multiple responses, extending the model and algorithm from Chiquet et al. (2017). We apply these methods on simulated data and on real data from Coupel-Ledru et al. (2014).
Fichier principal
Vignette du fichier
poster_Brault_Eucarpia.pdf (1.18 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité

Dates et versions

hal-01868802 , version 1 (04-05-2021)

Identifiants

  • HAL Id : hal-01868802 , version 1
  • PRODINRA : 442299

Citer

Charlotte Brault, Marie Perrot-Dockès, Agnes Doligez, Julien Chiquet, Loic Le Cunff, et al.. Multivariate statistical modelling for QTL detection and marker selection in a bi-parental grapevine population. 17. Meeting of the EUCARPIA Section Biometrics in Plant Breeding, Sep 2018, Gand, Belgium. ⟨hal-01868802⟩
199 Consultations
17 Téléchargements

Partager

Gmail Facebook X LinkedIn More