Screening for resistance to coffee leaf rust Hemileia vastatrix in Coffea arabica introductions from Yemen
The resistance to coffee leaf rust (Hemileia vastatrix Berk and Br.) was studied in 24 introductions of Coffea arabica from South Yemen using inoculation of leaf disks. Despite the variation found for morphological characters, all the plants showed susceptibility to Race II of H. vastatrix. The analysis of partial resistance shower significant but low differences between introductions for lesion density (LD) and reaction type (RT). The results appear to suggest that: (a) primitive coffee trees introduced into Yemen did not posses any resistance genes or (b) the absence of coffee leaf rust in Yemen for several centuries has led to the erosion of these genes. Differences in morphological characteristics observed between the introductions may not be sufficient to prove that a high level of genetic variation exists within this population.
| Main Authors: | , |
|---|---|
| Format: | biblioteca |
| Published: |
1993
|
| Subjects: | COFFEA ARABICA, HEMILEIA VASTATRIX, RESISTENCIA A LA ENFERMEDAD, ENFERMEDADES FUNGOSAS, YEMEN, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|