Breeding for resistance to coffee berry disease caused by Colletotrichum coffeanum Noak (Sensu Hindorf) in Coffea arabica L., 1: Methods of preselection for resistance
Two methods of preselection for resistance to coffee berry disease, by artificial inoculation of young coffee seedlings, have been developed recently at the Coffee Research Station in Kenya. The efficiency of these methods has been investigated in a series of experiments by comparing the results of the preselection tests with mature plant resistance, as indicated by visual field scores and artificial inoculation of berries and bud leaves of mature trees and including a large number of varieties and cultivars of Coffea arabica. The preselection test, by which the hypocotyl stems of 6-week old seedlings are inoculated with a spore suspension of the pathogen, proved to be more reliable than the second preselection test with shoot-tips of 10 month old plants. Correlation coefficients between the preselection test and mature plant resistance were resp. r = 0.73-0.80 for the first test against r = 0.60 for the latter
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1977
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| Subjects: | COFFEA ARABICA, COLLETOTRICHUM COFFEANUM, RESISTENCIA A LA ENFERMEDAD, ENFERMEDADES FUNGOSAS, INOCULACION, |
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