MONITORING RACES OF Bremia lactucae ON LETTUCE IN 2012 AND 2013 AT SÃO PAULO STATE

• Grant number: 12/15703-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: November 01, 2012
• End date: February 28, 2014
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Leila Trevisan Braz
• Grantee: Renata de Castro Nunes
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Lettuce is the group most consumed vegetables in Brazil; however, the difficulty of producing it has been increasing, mainly due to infestation of production areas by Bremia lactucae, which causes downy mildew, major disease of lettuce, and the development of cultivars resistant measures for the control more efficient and economical. Despite the benefits provided by planting resistant cultivars, the use of resistance genes in lettuce, have a short duration, because of the wide genetic variability of B. lactucae. Thus, it appears that the annual monitoring of places for the presence or absence of new strains of B. lactucae is of great importance, since it becomes possible to select genes that confer resistance to disease. Given the above, the aim of this study: monitor the races of B. lactucae in lettuce main producing places of São Paulo. It will be collected isolates of B. lactucae from different lettuce producing areas in the State of Sao Paulo in 2012 and 2013. The isolates collected will be taken to the Laboratory of Genetics and Breeding vegetable crops, the Department of Plant Production (UNESP-FCAV) were inoculated on the susceptible cultivar Solaris, until you get the amount of sporangia enough to use in the test for differentiation of races. After the isolates will be inoculated on the differential cultivar and, on the same day of the first onset of sporulation in the susceptible cultivar 'Green Tower (DM 0)', the differential cultivar were evaluated for presence or absence of lesions sporulating and necrotic spots. All materials that have proved susceptible to certain race will have their values summed within each group and the result is separated by a slash, and we could identify the breeds present in each isolate.

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)

RENATA DE CASTRO NUNES; RENATA CASTOLDI; RAFAELLE FAZZI GOMES; DORA ENITH TOBAR-TOSSE; LEILA TREVISAN BRAZ. Levantamento de raças do agente causador do míldio da alface no Estado de São Paulo em 2012 e 2013. Summa Phytopathologica, v. 42, n. 1, p. 53-58, 2016-03-00. (12/15703-4, 12/09705-4)

BRAZ, L. T.; DINIZ, G. M. M.; CASTOLDI, R.; NUNES, R. C.; GALATTI, F. S.; CAMARGO, M.; MARIN, M. V.; DALPIAN, T.; SOUZA, J. O.; GOMES, R. F.; et al. Monitoring races of Bremia lactucae in the State of Sao Paulo from 2003 to 2012. XXIX INTERNATIONAL HORTICULTURAL CONGRESS ON HORTICULTURE: SUSTAINING LIVES, LIVELIHOODS AND LANDSCAPES (IHC2014): INTERNATIONAL SYMPOSIUM ON PLANT BREEDING IN HORTICULTURE, v. 1127, p. 5-pg., 2016-01-01. (12/09705-4, 10/01820-3, 12/15703-4, 11/07194-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

NUNES, Renata de Castro. Levantamento de raças do agente causador do míldio da alface no estado de São Paulo em 2012 e 2013. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.