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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

RESISTANCE TO ALTERNARIA BROWN SPOT OF NEW CITRUS HYBRIDS

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Author(s):
Fernandes De Campos, Kelly Aparecida [1] ; De Azevedo, Fernando Alves [1] ; Bastianel, Marines [1] ; Cristofani-Yaly, Mariangela [1]
Total Authors: 4
Affiliation:
[1] Inst Agron IAC, Ctr APTA Citros Sylvio Moreira, Cordeiropolis, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Revista Brasileira de Fruticultura; v. 39, n. 5, p. 1-10, 2017.
Web of Science Citations: 0
Abstract

Alternaria brown spot (ABS) disease is caused by the fungus of Alternaria alternata f. sp. citri, which causes injury in leaves, branches and fruits of citrus. The action of the pathogen is directly related to the presence of toxin receptors in susceptible genotypes. The objective of this study was to characterize a population of citrus hybrids obtained from controlled crosses between Pera de Abril sweet orange and the hybrid of Murcott tangor x Pera sweet orange (TM x LP 163) for response to ABS through the in vitro inoculation of fungal spores in young detached leaves. The fungus was isolated from the lesions of Murcott tangor fruits that exhibited ABS symptoms. Two hundred thirty-five hybrids were evaluated, and 70 (30%) showed different levels of disease symptoms on detached leaves after 72 hours of inoculation with the fungus, and 165 (70%) were asymptomatic. The frequency of segregation observed (165R:70S) and high level of heritability (h(g)(2) = 0.91) suggest that few genes may be involved in controlling the inheritance of ABS resistance in citrus. (AU)

FAPESP's process: 11/18605-0 - Obtaining and evaluation of new varieties of scion and rootstock for citrus
Grantee:Mariângela Cristofani-Yaly
Support type: Research Projects - Thematic Grants
FAPESP's process: 11/21559-0 - Characterization and selection of mandarin and hybrids of the São Paulo State
Grantee:Marinês Bastianel
Support type: Regular Research Grants
FAPESP's process: 14/50880-0 - INCT 2014: comparative and functional genomics and citrus-assisted breeding
Grantee:Marcos Antonio Machado
Support type: Research Projects - Thematic Grants