Arabica coffee accessions originated from Ethiopia with resistance to nematode Meloidogyne paranaensis
| Autor: | Luciana Harumi Shigueoka, Dhalton Shiguer Ito, Melina Marques Holderbaum, Gustavo Hiroshi Sera, Lucas Eduardo Fernandes, Débora Cristina Santiago |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | AUGUST 2020. :1209-1213 |
| ISSN: | 1835-2707 1835-2693 |
| DOI: | 10.21475/ajcs.20.14.08.p1763 |
| Popis: | The aim of this study was to evaluate the resistance of Ethiopian Coffea arabica from IAPAR’s germplasm bank to Meloidogyne paranaensis. Two experiments were carried out in a greenhouse in IAPAR, Londrina, Paraná State, Brazil. A completely randomized design was used with 15 treatments, eight replications and one plant per plot. 14 accessions of C. arabica from Ethiopia were evaluated and the cultivar Mundo Novo IAC 376-4 was used as a susceptible control. Seedlings with three to four pairs of leaves were transplanted into plastic cups with a capacity of 700 mL and 1200 eggs and/or J2 of M. paranaensis (IP) were inoculated after one month. The evaluations were performed 130 days after inoculation, when the data of the number of eggs and J2 per gram of roots, the final population of nematodes (FP) were obtained and the reproduction factor (RF) was calculated using the formula: RF = IP / FP. To classify the resistance levels of the genotypes, the reduction of the reproduction factor (RRF) was used. The Ethiopian accessions were classified from highly resistant to highly susceptible. Most of the Ethiopian coffees were highly resistant to M. paranaensis. The genotype Geisha also showed resistance, but is still in heterozygous condition. |
| Databáze: | OpenAIRE |
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