title: Molecular Characterization of Meloidogyne christiei Golden and Kaplan, 1986 (Nematoda, Meloidogynidae) Topotype Population Infecting Turkey Oak (Quercus laevies) in Florida.
abstract: Meloidogyne christiei isolated from turkey oak, Quercus laevies, from the type locality in Florida was characterized using isozyme profiles and ribosomal and mitochondrial gene sequences. The phenotype N1a detected from a single egg-laying female of M. christiei showed one very strong band of malate dehydrogenase (MDH) activity; however, no esterase (EST) activity was identified from macerate of one or even 20 females per well. Phylogenetic relationships within the genus Meloidogyne as inferred from Bayesian analysis of partial 18S ribosomal RNA (rRNA), D2-D3 of 28S rRNA, internal transcribed spacer (ITS) rRNA, and cytochrome oxidase subunit II (COII)-16S rRNA of mitochondrial DNA (mtDNA) gene fragments showed that M. christiei formed a separate lineage within the crown group of Meloidogyne and its relationships with any of three Meloidogyne clades were not resolved.
authors.affiliation: Nematologists, Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Gainesville, FL 32614-7100.
authors.forename: J A
authors.initials: JA
authors.lastname: Brito
authors.affiliation: Nematologist, Plant Pest Diagnostic Center, California Department of Food and Agriculture, Sacramento, CA 95832-1448.
authors.forename: S A
authors.initials: SA
authors.lastname: Subbotin
authors.affiliation: Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Republic of Korea.
authors.forename: H
authors.initials: H
authors.lastname: Han
authors.affiliation: Nematologists, Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Gainesville, FL 32614-7100.
authors.forename: J D
authors.initials: JD
authors.lastname: Stanley
authors.affiliation: Professor, Entomology and Nematology Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611-0620.
authors.forename: D W
authors.initials: DW
authors.lastname: Dickson
keywords: 18S rRNA; 28S rRNA; ITS rRNA; Meloidogyne christiei; Quercus laevis; isozymes; mtDNA; oak; phylogeny; root-knot nematodes