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Association between isoenzymatic phenotypes and resistance to the fungus Microcyclus ulei P. Henn. (v. Arx.) in rubber tree clones^*

Antonio Nascim Kalil Filho^I; Marco Antonio Del Lama^II; Moacyr Antonio Mestriner^III

^ICentro de Pesquisa Agroflorestal da Amazônia Ocidental (CPAA), Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Caixa Postal 319, 69048-660 Manaus, AM, Brasil. Send correspondence to A.N.K.F.
^IIDepartamento de Genética e Evolução, Universidade Federal de São Carlos, Caixa Postal 676, 13560-001 São Carlos, SP, Brasil
^IIIDepartamento de Genética e Matemática Aplicada à Biologia, Av. Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brasil

ABSTRACT

Electrophoretic analysis of 78 rubber tree clones was carried out in starch gel in order to detect associations between enzyme phenotypes and resistance to South American Leaf Blight caused by Microcyclus ulei. Seven enzymatic systems were studied: Adh, Pgi, 6Pgd, Mdh, Lap, Skd and Acp.
Associations between specific enzymatic phenotypes (Pgi 4-3, 6Pgd 2-1 and Mdhi 4-2) and resistance indicate that selection for resistance to M. ulei would be possible, using these markers.

Keywords: isoenzymatic phenotypes; fungus; Microcyclus ulei; rubber tree.

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* Part of a thesis presented by A.N.K.F. to Departamento de Genética e Matemática Aplicada à Biologia, FMRP, USP, Ribeirão Preto, in partial fulfillment of the requirements for the Doctoral degree.