ISHS Acta Horticulturae 702: V International Pineapple Symposium
EVALUATION OF PINEAPPLE GENOTYPES FOR RESISTANCE TO FUSARIUM SUBGLUTINANS |
| Authors: | A.P. de Matos, J.R.S. Cabral |
| Keywords: | pineapple fusariose, genetic resistance, germplasm evaluation, Ananas comosus var. comosus |
| Abstract:
Fusarium subglutinans, the causal agent of the pineapple fusariose, is the most serious problem of that crop in Brazil, where the disease was first reported in 1964. Yield losses due to fusariose disease vary according to time of harvest and growing season. Since genetic resistance is considered an important component for the disease management, several experiments were carried out at Embrapa Cassava & Tropical Fruit, under greenhouse conditions, in a completely randomized design with five replicates, in order to evaluate the reaction of pineapple genotypes to inoculation, by the wounding and dipping technique, with F. subglutinans. A total of 211 genotypes, all of them from the Pineapple Active Germplasm Bank of Embrapa Cassava & Tropical Fruit, were evaluated for resistance to the pathogen. The reference genotypes were the cultivars Pérola and Smooth Cayenne, susceptible, and Perolera and Primavera, resistant. Evaluations showed that 100 genotypes, or 47.4%, showed no symptoms of the disease, while the remaining 111 genotypes, corresponding to 52.6%, behaved as susceptible to F. subglutinans. All inoculated plants of cultivars Pérola and Smooth Cayenne, reference genotypes for susceptibility, showed fusariose symptoms at evaluation. These data indicate that resistance is of fairly common occurrence among pineapple genotypes. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
