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A CONSTANS-like gene candidate that could explain most of the genetic variation for flowering date in Medicago truncatula

Abstract : Flowering is a critical period during a plant's life cycle, and thus the identification and characterization of genes involved in flowering date control are of great importance in agronomy, breeding, population genetics and ecology. The model species Medicago truncatula can be used to detect genes explaining the variation for flowering date, which could also explain this variation in legume crops. The objective of this study was to identify the most promising candidate gene explaining a major quantitative trait locus (QTL) for flowering date previously found in three M. truncatula mapping populations. Fine mapping and bioinformatic analysis of bacterial artificial chromosomes (BACs) in the confidence interval of the QTL showed six genes potentially involved in the control of flowering date. Two of these genes, similar to CONSTANS and FT of Arabidopsis thaliana respectively, had genomic mutations when compared to the parents. The transcriptomic study of these genes by semi-quantitative RT-PCR in leaves and flowers sampled at two developmental stages showed that the CONSTANS-like gene was differentially expressed in the two parental lines. A gene belonging to the CONSTANS-like family could explain the major QTL for flowering date segregating in M. truncatula progenies.
Mots-clés : qtl
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https://hal.inrae.fr/hal-02644376
Déposant : Migration Prodinra <>
Soumis le : jeudi 28 mai 2020 - 22:34:48
Dernière modification le : lundi 2 novembre 2020 - 09:22:02

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Jean-Baptiste Pierre, Matthieu Bogard, Doris Herrmann, Christian Huyghe, Bernadette Julier. A CONSTANS-like gene candidate that could explain most of the genetic variation for flowering date in Medicago truncatula. Molecular Breeding, Springer Verlag, 2011, 28 (1), pp.25-35. ⟨10.1007/s11032-010-9457-6⟩. ⟨hal-02644376⟩

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