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Foundation characteristics of edible Musa triploids revealed from allelic distribution of SSR markers

Hippolyte Isabelle, Jenny Christophe, Gardes Laëtitia, Bakry Frédéric, Rivallan Ronan, Pomies Virginie, Cubry Philippe, Tomekpé Kodjo, Risterucci Ange-Marie, Roux Nicolas, Rouard Mathieu, Arnaud Elizabeth, Kolesnikova-Allen Maria, Perrier Xavier. 2012. Foundation characteristics of edible Musa triploids revealed from allelic distribution of SSR markers. Annals of Botany, 109 (5) : pp. 937-951.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : PLANT SCIENCES

Abstract : Background and Aims The production of triploid banana and plantain (Musa spp.) cultivars with improved characteristics (e.g. greater disease resistance or higher yield), while still preserving the main features of current popular cultivars (e.g. taste and cooking quality), remains a major challenge for Musa breeders. In this regard, breeders require a sound knowledge of the lineage of the current sterile triploid cultivars, to select diploid parents that are able to transmit desirable traits, together with a breeding strategy ensuring final triploidization and sterility. Highly polymorphic single sequence repeats (SSRs) are valuable markers for investigating phylogenetic relationships. Methods Here, the allelic distribution of each of 22 SSR loci across 561 Musa accessions is analysed. Key Results and ConclusionsWe determine the closest diploid progenitors of the triploid 'Cavendish' and 'Gros Michel' subgroups, valuable information for breeding programmes. Nevertheless, in establishing the likely monoclonal origin of the main edible triploid banana subgroups (i.e. 'Cavendish', 'Plantain' and 'Mutika- Lujugira'), we postulated that the huge phenotypic diversity observed within these subgroups did not result from gamete recombination, but rather from epigenetic regulations. This emphasizes the need to investigate the regulatory mechanisms of genome expression on a unique model in the plant kingdom. We also propose experimental standards to compare additional and independent genotyping data for reference. (Résumé d'auteur)

Mots-clés Agrovoc : Musa acuminata, Musa balbisiana, Musa (plantains), Triploïdie, Phylogénie, Microsatellite, Marqueur génétique, Génétique des populations

Mots-clés géographiques Agrovoc : Nigéria, Cameroun, Guadeloupe

Mots-clés complémentaires : SSR

Classification Agris : F30 - Plant genetics and breeding

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Hippolyte Isabelle, CIRAD-BIOS-UMR AGAP (FRA)
  • Jenny Christophe, CIRAD-BIOS-UMR AGAP (GLP)
  • Gardes Laëtitia, CIRAD-BIOS-UMR CMAEE (FRA)
  • Bakry Frédéric, CIRAD-BIOS-UMR AGAP (FRA)
  • Rivallan Ronan, CIRAD-BIOS-UMR AGAP (FRA)
  • Pomies Virginie, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-5481-5120
  • Cubry Philippe
  • Tomekpé Kodjo, CIRAD-BIOS-UMR AGAP (FRA)
  • Risterucci Ange-Marie, CIRAD-BIOS-UMR AGAP (FRA)
  • Roux Nicolas, Bioversity International (FRA)
  • Rouard Mathieu, Bioversity International (FRA)
  • Arnaud Elizabeth, Bioversity International (FRA)
  • Kolesnikova-Allen Maria, IITA (NGA)
  • Perrier Xavier, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-0092-003X

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/563744/)

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