Qualitative resistance of Hevea to Phyllachora huberi P. Henn

Le Guen Vincent, Seguin Marc, Mattos Carlos Raimunto Reis. 2000. Qualitative resistance of Hevea to Phyllachora huberi P. Henn. Euphytica, 112 (2) : 211-217.

Autre titre : Résistance qualitative de Hevea à Phyllachora huberi P. Henn

Résumé : Qualitative observations of Hevea spp. resistance to Phyllachora huberi were carried out on 200 clones in a collection and 21 full-sib progenies under natural conditions of infestation. A total of 42 clones, mostly originating from the natural range of the Hevea genus, and at least two species (H. brasiliensis and H. benthamiana) revealed total resistance to the parasite. For nine of the thirteen 'resistant x susceptible' and 'resistant x resistant' progenies studied, the ratio of susceptible : resistant plants suggested the existence of a total resistance mechanism produced by a dominant allele at a single locus for the P. huberi race(s) present at the study site. For three of the progenies involving the same resistant parent, it was possible to locate the gene (called Phr) at 14.7 cm from the adh isozyme locus.

Mots-clés Agrovoc : Hévéa, Hevea brasiliensis, résistance aux maladies, Phyllachorales, maladie fongique, race physiologique, isoenzyme, résistance génétique, épreuve sur la descendance, hérédité

Mots-clés géographiques Agrovoc : Brésil

Mots-clés complémentaires : Hevea benthamiana, Hevea pauciflora, Phyllachora huberi

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

Auteurs et affiliations

• Le Guen Vincent, CIRAD-CP-HEVEA (GUF)
• Seguin Marc, CIRAD-CP-HEVEA (THA)
• Mattos Carlos Raimunto Reis, Michelin Brésil (BRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/476613/)

Métriques

[ Page générée et mise en cache le 2024-12-18 ]