Detalhes bibliográficos
| Ano de defesa: |
2017 |
| Autor(a) principal: |
COSTA, Kleyton Danilo da Silva
 |
| Orientador(a): |
CARVALHO FILHO, José Luiz Sandes de |
| Banca de defesa: |
BATISTA, Renata Oliveira,
FREIRE, Adriano Márcio,
MESQUITA, Júlio Carlos Polimeni de,
CARVALHO, Rejane Rodrigues da Costa e |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal Rural de Pernambuco
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Melhoramento Genético de Plantas
|
| Departamento: |
Departamento de Agronomia
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/7065
|
Resumo: |
The bacterial wilt in the tomato crop is a disease that has local, national and world importance. This disease is difficult to control and can cause damage that can compromise the entire crop. Genetic resistance within integrated management is the primary measure of bacterial wilt control. In this sense, the knowledge of the genetic control of resistance in breeding programs tends to improve the efficiency in its planning and in the choice of the best method to be adopted. The objective of this thesis was to study the genetic control of resistance of 'Yoshimatsu' tomato to Ralstonia pseudosolanacearum and Ralstonia solanacearum. In the first stage two experiments were conducted with Yoshimatsu, IPA-7 and the F1, F2, RC11 and RC21 generations, using a randomized block design with four replicates. In the second stage two experiments were conducted with 43 progenies F2:3 and their parents with the same experimental design of the first stage. At each stage the two species of the R. solanacearum complex were inoculated in independent experiments. The incidence and severity of bacterial wilt were evaluated by means of a descriptive scale of notes at 10 and 20 days after inoculation. Genetic control of the resistance of tomato 'Yoshimatsu' to R. pseudosolanacearum involves two genes of greater effect with independent segregation of additive effects only, plus polygenes with additive and dominance effects, in which resistance is associated with recessive alleles. On the other hand, the genetic control of the resistance of the tomato 'Yoshimatsu' to R. solanacearum involves two genes of greater effect with independent segregation of additive effects and dominance, plus polygenes with additive and dominance effects, in which resistance is also associated To recessive alleles. In this study, the selection of plants resistant to R. pseudosolanacearum and R. solanacearum is indicated mainly at 20 days after inoculation. |
