Achievements in breeding coconut hybrids for tolerance to coconut foliar decay disease in Vanuatu, South Pacific
Labouisse Jean-Pierre, Sileye Tiata, Bonnot Francois , Baudouin Luc. 2011-01. .
ARTICLE, (2011-01 ) - PUBLISHEDVERSION - English (en-GB)
OPENACCESS -
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Audience : OTHER
HAL CCSD
Sujet
[SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding
Domaines
Agriculture, Coco, Biologie, Sciences du vivant
Description
Coconut foliar decay (CFD) is a disease of coconut (Cocos nucifera L.) associated with infection by coconut foliar decay virus (CFDV), which is endemic in Vanuatu, South Pacific. The local cultivar ‘Vanuatu Tall’ (VTT) is the only cultivar that is fully tolerant to CFD, whereas introduced cultivars and hybrids are affected to different degrees. From 1967 to 2008 a conventional breeding programme was conducted with the aim of creating hybrid planting material combining tolerance to CFD with improved copra yield and high copra weight per nut. This objective was achieved by crossing the progeny of selfed trees of ‘Rennell Island Tall’ (RIT) cultivar, selected for their low susceptibility to CFD in field screening tests, with VTT, improved by mass selection and intercrossing. An improved VTT × RIT hybrid was identified with a high degree of tolerance to CFD (less than 1% of diseased trees after 11 years of exposure to high disease pressure). The annual production of the improved VTT × RIT hybrid ranged from 21.9 to 28.6 kg of copra per tree, depending on the RIT parent, and was, on average, 34% higher than that of ‘VTT Elite’ an advanced cultivar obtained after four selection cycles of local VTT. However, the production of the hybrid in Vanuatu involves constraints such as frequent replanting and isolation of the seed garden and CFD control for the RIT parents. The importance of conducting research on the genetic determinism and the mechanism of tolerance to CFD for better control of the disease in the event that it spreads outside Vanuatu is discussed.
Auteurs
Labouisse, Jean-Pierre, Sileye, Tiata, Bonnot, Francois, , Baudouin, Luc
Contributeurs
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Département Systèmes Biologiques (Cirad-BIOS) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Coconut Division (VARTC) ; Vanuatu Agricultural Research and Technical Center, Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
Sources
ISSN: 0014-2336, Euphytica, https://hal.archives-ouvertes.fr/hal-02546631, Euphytica, 2011, 177 (1), pp.1-13. ⟨10.1007/s10681-010-0220-1⟩
Relation
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10681-010-0220-1