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Genome mapping and genetic analysis of the black leaf streak resistance in bananas

Carreel Françoise, Abadie Catherine, Carlier Jean, Tomekpé Kodjo, Lagoda Pierre, Bakry Frédéric. 1999. Genome mapping and genetic analysis of the black leaf streak resistance in bananas. In : The International symposium on the molecular and cellular biology of banana. Boyce Thompson Institute for Plant Research. New York : Boyce Thompson Institute for Plant Research, Résumé, p. 7. International Symposium on the Molecular and Cellular Biology of Banana, Ithaca, États-Unis, 22 March 1999/25 March 1999.

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Autre titre : Cartographie du génome et analyse génétique de la résistance à la maladie des raies noires chez les bananiers

Abstract : Banana production is severely threatened by the Black Leaf Streak (BLS) disease caused by Mycosphaerella fijiensis. Numerous chemical applications are needed to control the fungus's impact on leaves which reduces yields and causes premature ripening of fruits. Genetic improvement for resistance to BLS disease appears as the most durable, cost and environmentally efficient control. Screening for resistance has led to the identification of two forms of resistance reported as High Resistance (HR, hypersensitive response) and Partial Resistance (PR). In connection with the breeding program, a genome mapping approach for genetic and QTL analyses was developed to characterise the HR form. An F2 segregating population of 153 plants was obtained from a cross between two wild seeded banana accessions, Musa acuminata burmannicoides type Calcutta 4 and M. a. banksii type Madang. A linkage map was constructed with 110 AFLP markers in association with 39 codominant RFLP and SSR markers to anchor the linkage groups to the banana genetic core map. Results showed significant allelic distorted segregations in the F2 progeny for 58 markers which highlight the use of molecular studies for inheritance analyses. A first mapping concluded to join the markers in 11 linkage groups. Correlations made with field observations, ranked into six classes of infection severity, led to the identification of one RFLP marker strongly associated to the resistance and a second QTL mapped onto a different linkage group with lower significance level

Mots-clés Agrovoc : Musa, Musa acuminata, Mycosphaerella fijiensis, Maladie fongique, Génétique, Résistance aux maladies, Carte génétique, Dégât, Feuille, Amélioration des plantes, Sélection, Réponse de la plante, Contrôle de maladies, Ségrégation, Marqueur génétique, RFLP, Analyse quantitative, Hérédité

Mots-clés complémentaires : Raie noire

Classification Agris : F30 - Plant genetics and breeding
H20 - Plant diseases

Auteurs et affiliations

  • Carreel Françoise, CIRAD-FLHOR-BPA (GLP)
  • Abadie Catherine, CIRAD-FLHOR-BPA (CMR)
  • Carlier Jean, CIRAD-AMIS-PROTECTION DES CULTURES (FRA)
  • Tomekpé Kodjo, CIRAD-FLHOR-BPA (CMR)
  • Lagoda Pierre, CIRAD-AMIS-BIOTROP (FRA)
  • Bakry Frédéric, CIRAD-FLHOR-BPA (FRA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/468066/)

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