Multi-parent multi-environment QTL analysis: an illustration with the EU-NAM Flint population

Vincent Garin*, Marcos Malosetti, Fred van Eeuwijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)


Key message: Multi-parent populations multi-environment QTL experiments data should be analysed jointly to estimate the QTL effect variation within the population and between environments. Abstract: Commonly, QTL detection in multi-parent populations (MPPs) data measured in multiple environments (ME) is done by analyzing genotypic values ‘averaged’ across environments. This method ignores the environment-specific QTL (QTLxE) effects. Running separate single environment analyses is a possibility to measure QTLxE effects, but those analyses do not model the genetic covariance due to the use of the same genotype in different environments. In this paper, we propose methods to analyse MPP-ME QTL experiments using simultaneously the data from several environments and modelling the genotypic covariance. Using data from the EU-NAM Flint population, we show that these methods estimate the QTLxE effects and that they can improve the quality of the QTL detection. Those methods also have a larger inference power. For example, they can be extended to integrate environmental indices like temperature or precipitation to better understand the mechanisms behind the QTLxE effects. Therefore, our methodology allows the exploitation of the full MPP-ME data potential: to estimate QTL effect variation (a) within the MPP between sub-populations due to different genetic backgrounds and (b) between environments.

Original languageEnglish
Pages (from-to)2627-2638
JournalTheoretical and Applied Genetics
Issue number9
Early online date9 Jun 2020
Publication statusPublished - Sep 2020

Fingerprint Dive into the research topics of 'Multi-parent multi-environment QTL analysis: an illustration with the EU-NAM Flint population'. Together they form a unique fingerprint.

Cite this