Inheritance of resistance to Meloidogyne enterolobii and individual selection in segregating populations of Psidium spp
| Autor: | Odimar Ferreira de Almeida, Ricardo Moreira Souza, Daniele Lima Rodrigues, Eileen Azevedo Santos, Vicente Gomes, Alexandre Pio Viana, Rodrigo Moreira Ribeiro |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Psidium biology 04 agricultural and veterinary sciences Plant Science Fungus Interspecific competition Horticulture biology.organism_classification 01 natural sciences Meloidogyne enterolobii Nematode Botany 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Cultivar Agronomy and Crop Science Fusarium solani 010606 plant biology & botany Hybrid |
| Zdroj: | European Journal of Plant Pathology. 148:699-708 |
| ISSN: | 1573-8469 0929-1873 |
| Popis: | Interaction between the phytonematode Meloidogyne enterolobii and the fungus Fusarium solani has caused direct and indirect losses in the entire guava production chain and consequent extermination of guava plantations throughout Brazil. The combined action of these two pathogens is known as “guava decline”. In order to obtain and assess Psidium spp. interspecific hybrids for resistance to the nematode M. enterolobii, interspecific crosses of P. guineense (susceptible araca) x P. cattleyanum (resistant araca); P.guineense (susceptible araca) x P. guajava (susceptible guava) and P. cattleyanum (resistant araca) x P. guajava (susceptible guava) were conducted. These crosses resulted in hybrid immune, susceptible and resistant to Meloidogyne enterolobii. The chi-square test rejected the hypothesis of monogenic inheritance with incomplete dominance, which corroborates that this trait has polygenic action. Predictions of genetic values and parameters were obtained by the REML / BLUP procedure, at individual level. Finally, the 30 selected individuals (immune and resistant) were obtained, which will be backcrossed with guava for the recovery of the agronomic traits desired and subsequent release of a new cultivar. |
| Databáze: | OpenAIRE |
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