Papaya breeding for tolerance to bacterial decline (Erwinia sp.) in the Caribbean region

Ollitrault Patrick, Bruyère Saturnin, Ocampo Perez John Albeiro, De Lapeyre Luc, Gallard Anthony, Argoud Laurence, Duval Marie-France, Coppens D'Eeckenbrugge Géo, Le Bellec Fabrice. 2007. Papaya breeding for tolerance to bacterial decline (Erwinia sp.) in the Caribbean region. In : Proceedings of the first International Symposium on Papaya : Genting Highlands, Malaysia, November 22 - 24, 2005. Chan Y.K. (ed.), Paull Robert E. (ed.), Shukor A.R.Abd. (ed.). ISHS-Section tropical and subtropical fruits. Louvain : ISHS [Belgique], 79-91. (Acta Horticulturae, 740) ISBN 978-90-6605-288-8 International Symposium on Papaya. 1, Genting Highlands, Malaisie, 22 Novembre 2005/24 Novembre 2005.

Résumé : Papaya has a great potential for agricultural diversification in the Caribbean region, because of its rusticity, rapid production, high yields and the wide demand on local and international markets. At the end of the 1960s, a disease caused by Erwinia sp. appeared in the West Indies. This 'bacterial decline' decimated all the papaya fields in the area, where the cultivar 'Solo' was grown for its high yields and good quality. The disease is found from Virgin Islands to Venezuela. Tolerant accessions have been previously identified in the regional germplasm, however tolerance sources generally showed poor fruit quality and dioecy. A breeding project has been implemented by CIRAD in Guadeloupe to select good quality cultivars with improved level of tolerance. The first step was analyzing morphological and genetic diversity of regional germplasm, as compared with some commercial cultivars. Morphological diversity is important, but shows no particular structure, while isozyme diversity is more limited but displays some geographic structure. The level of tolerance to Erwinia strains appeared variable in relation with the tested papaya families, the Erwinia strains and the environmental conditions. However the rank for tolerance of the families remains the same whatever the strains and the environmental conditions. Tolerance appears to be transmitted in a co-dominant way in F1 hybrids between cultivar Solo and tolerant accessions. Selection of tolerant hermaphrodite lines is going on through backcross and endogamy strategies.

Classification Agris : F30 - Génétique et amélioration des plantes
H20 - Maladies des plantes

Auteurs et affiliations

• Ollitrault Patrick, CIRAD-FLHOR-UPR Multiplication végétative (FRA) ORCID: 0000-0002-9456-5517
• Bruyère Saturnin, CIRAD-FLHOR-UPR Production fruitière (GLP)
• Ocampo Perez John Albeiro, IPGRI (ITA)
• De Lapeyre Luc, CIRAD-FLHOR-UPR Systèmes bananes et ananas (CMR) ORCID: 0000-0003-1243-0887
• Gallard Anthony, CIRAD-FLHOR-UPR Production fruitière (GLP)
• Argoud Laurence, CIRAD-FLHOR-UPR Production fruitière (GLP)
• Duval Marie-France, CIRAD-FLHOR-UPR Multiplication végétative (FRA)
• Coppens D'Eeckenbrugge Géo, CIRAD-FORET-UPR Ressources génétiques (FRA)
• Le Bellec Fabrice, CIRAD-FLHOR-UPR Production fruitière (GLP) ORCID: 0000-0001-8145-7560

Source : Cirad - Agritrop (https://agritrop.cirad.fr/542159/)

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