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Traditional banana diversity in Oceania: An endangered heritage

Kagy Valérie, Wong Maurice, Vandenbroucke Henri, Jenny Christophe, Dubois Cécile, Ollivier Anthony, Cardi Céline, Mournet Pierre, Tuia Valérie Saena, Roux Nicolas, Dolezel Jaroslav, Perrier Xavier. 2016. Traditional banana diversity in Oceania: An endangered heritage. PloS One, 11 (3):e0151208, 19 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Url - jeu de données : http://tropgenedb.cirad.fr/tropgene/JSP/interface.jsp?module=BANANA

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Additional Information : Jeux de données disponibles : SSR and DArT data were made freely available on TropGene DataBase by Chantal Hamelin: http://tropgenedb.cirad.fr/tropgene/JSP/interface.jsp?module=BANANA, and in S1 Dataset

Abstract : This study aims to understand the genetic diversity of traditional Oceanian starchy bananas in order to propose an efficient conservation strategy for these endangered varieties. SSR and DArT molecular markers are used to characterize a large sample of Pacific accessions, from New Guinea to Tahiti and Hawaii. All Pacific starchy bananas are shown of New Guinea origin, by interspecific hybridization between Musa acuminata (AA genome), more precisely its local subspecies M. acuminata ssp. banksii, and M. balbisiana (BB genome) generating triploid AAB Pacific starchy bananas. These AAB genotypes do not form a subgroup sensu stricto and genetic markers differentiate two subgroups across the three morphotypes usually identified: Iholena versus Popoulu and Maoli. The Popoulu/Maoli accessions, even if morphologically diverse throughout the Pacific, cluster in the same genetic subgroup. However, the subgroup is not strictly monophyletic and several close, but different genotypes are linked to the dominant genotype. One of the related genotypes is specific to New Caledonia (NC), with morphotypes close to Maoli, but with some primitive characters. It is concluded that the diffusion of Pacific starchy AAB bananas results from a series of introductions of triploids originating in New Guinea area from several sexual recombination events implying different genotypes of M. acuminata ssp. banksii. This scheme of multiple waves from the New Guinea zone is consistent with the archaeological data for peopling of the Pacific. The present geographic distribution suggests that a greater diversity must have existed in the past. Its erosion finds parallels with the erosion of cultural traditions, inexorably declining in most of the Polynesian or Melanesian Islands. Symmetrically, diversity hot spots appear linked to the local persistence of traditions: Maoli in New Caledonian Kanak traditions or Iholena in a few Polynesian islands. These results will contribute to optimizing the conservation strategy for the ex-situ Pacific Banana Collection supported collectively by the Pacific countries. (Résumé d'auteur)

Mots-clés Agrovoc : Musa, Musa balbisiana, Musa acuminata, Variation génétique, Biodiversité, Plante amylacée, Génotype, Conservation des ressources génétiques, Marqueur génétique, Biogéographie, Organisme indigène

Mots-clés géographiques Agrovoc : Océanie, Asie et Pacifique, Nouvelle-Calédonie, Hawaï, Vanuatu, Papouasie-Nouvelle-Guinée, Polynésie française

Mots-clés complémentaires : SSR

Mots-clés libres : Banana, Pacific, Oceania, Diversity

Classification Agris : F30 - Plant genetics and breeding
F70 - Plant taxonomy and geography

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Kagy Valérie, IAC (NCL)
  • Wong Maurice, Service du développement rural (PYF)
  • Vandenbroucke Henri
  • Jenny Christophe, CIRAD-BIOS-UMR AGAP (FRA)
  • Dubois Cécile, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-9167-4080
  • Ollivier Anthony
  • Cardi Céline, CIRAD-BIOS-UMR AGAP (FRA)
  • Mournet Pierre, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-8011-8647
  • Tuia Valérie Saena, CEPACT (FJI)
  • Roux Nicolas, Bioversity International (FRA)
  • Dolezel Jaroslav, Institute of Experimental Botany (CZE)
  • Perrier Xavier, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-0092-003X

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580085/)

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