Varietal resistance evaluation and production of transgenic citrus plants potentialy resistant to the Xanthomonas axonopodis pv.citri

• Grant number: 99/12594-3
• Support Opportunities: Research Projects - Thematic Grants
• Start date: February 01, 2001
• End date: April 30, 2006
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Sérgio Alves de Carvalho
• Grantee: Sérgio Alves de Carvalho
• Host Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil

Abstract

Involving the participation of researchers from different institutions from São Paulo State, as Centro de Citricultura Sylvio Moreira/IAC, Instituto Biológico and Fundecitrus, the purpose of this project composed of three sub-projects is to evaluate the varietal resistance to citrus canker in citrus germoplasm of commercial interest; the development of a rapid evaluation system for patogenicity in controlled environmental conditions; and the development of a genetic transformation system for introduction of horizontal resistance to the bacteria. In the first subproject, the evaluation of resistance or tolerance to Xanthomonas axonopodis pv. citri which causes the canker A of crescent occurrence in citric orchards in São Paulo State, will be carried out in greenhouse and experimental field, at the Estação de Pesquisas Biológicas de Presidente Prudente/Instituto Biológico, where studies about this disease have been conducted for several decades. In an orchard with plants spacing 7,0 x 3,5 m, using the Rangpur Lime as rootstock, 175 varieties of sweet orange and 117 mandarins and hybrids from Active Germoplasm Bank of Centro de Citricultura Sylvio Moreira/IAC, will be evaluated. The experiment will be carried out in random blocks, with two repetitions, with 5 plants per variety per repetition and one plant per plot. The Baianinha sweet orange variety Mil be used as natural source of contamination... (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE CARVALHO, SERGIO ALVES; DE CARVALHO NUNES, WILLIAM MARIO; BELASQUE, JR., JOSE; MACHADO, MARCOS ANTONIO; CROCE-FILHO, JOSE; BOCK, CLIVE H.; ABDO, ZAID. Comparison of Resistance to Asiatic Citrus Canker Among Different Genotypes of Citrus in a Long-Term Canker-Resistance Field Screening Experiment in Brazil. PLANT DISEASE, v. 99, n. 2, p. 207-218, FEB 2015. (99/12594-3)

AMARAL, A. M.; CARVALHO, S. A.; SILVA, L. F. C.; MACHADO, M. A.. REACTION OF GENOTYPES OF CITRUS SPECIES AND VARIETIES TO XANTHOMONAS CITRI subsp CITRI UNDER GREENHOUSE CONDITIONS. JOURNAL OF PLANT PATHOLOGY, v. 92, n. 2, p. 519-524, JUL 2010. (99/12594-3)