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Diversity of Meloidogyne exigua (Tylenchida: Meloidogynidae) populations from coffee and rubber tree

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For more content, see Nematologica.

Isozymes (esterase and malate dehydrogenase), SCAR and RAPD-PCR were studied in 15 populations of three races of Meloidogyne exigua collected in coffee-producing areas in Brazil, Bolivia and Costa Rica and one population from rubber tree plantations in Brazil. This study revealed four esterase phenotypes (E1, E2, E2a, E3) and three malate dehydrogenase phenotypes (N1, N1a, N2) for M. exigua populations. The most common multi-enzyme phenotype was E2N1. The enzymatic phenotypes do not separate M. exigua races. Sixteen populations of M. exigua were tested in Multiplex PCR using SCAR primers ex-D15F/R that allowed the identification of all M. exigua populations. Phylogenetic analyses showed high intraspecific polymorphism (25.9-59.6%) for all M. exigua studied. However, all populations clustered together with 100% bootstrap support, thereby demonstrating the consistency of species identification. In general, no correlation was found between enzymatic profile, race and genetic polymorphism of the studied populations.

Affiliations: 1: UFAL – Centro de Ciências Agrárias, 57100-000 Rio Largo, AL, Brazil;, Email: mf.muniz@uol.com.br; 2: UFLA – Departamento de Fitopatologia, C.P. 3037, 37200-000 Lavras, MG, Brazil; 3: INRA, UMR1064 IPMSV, BP167, 06903 Sophia Antipolis, France; 4: EMBRAPA – Semi-Árido, C.P. 23, 56302-970 Petrolina, PE, Brazil; 5: EMBRAPA – Recursos Genéticos e Biotecnologia, C.P. 02372, 70849-970 Brasília, DF, Brazil

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/content/journals/10.1163/156854108786161418
2008-11-01
2016-12-09

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