title: Huxley's line demarcates extensive genetic divergence between eastern and western forms of the giant freshwater prawn, Macrobrachium rosenbergii.
abstract: Phylogenetic analysis of representatives from 18 wild populations of the giant freshwater prawn, Macrobrachium rosenbergii, utilising a fragment of the 16S rRNA mitochondrial gene, identified two major reciprocally monophyletic clades either side of a well-known biogeographic barrier, Huxley's line. The level of divergence between the two clades (maximum 6.2%) far exceeds divergence levels within either clade (maximum 0.9%), and does not concord with geographical distance among sites. 'Eastern' and 'western' M. rosenbergii clades have probably been separated since Miocene times. Within-clade diversity appears to have been shaped by dispersal events influenced by eustatic change.
authors.affiliation: School of Natural Resource Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia. m.debruyn@qut.edu.au
authors.forename: Mark
authors.initials: M
authors.lastname: de Bruyn
authors.forename: John A
authors.initials: JA
authors.lastname: Wilson
authors.forename: Peter B
authors.initials: PB
authors.lastname: Mather
mesh_terms: D000818:Animals; D020029:Base Pairing; D001483:Base Sequence; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D004272:DNA, Mitochondrial / Q000235:genetics / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000235:genetics; D005618:Fresh Water; D014644:Genetic Variation; D005843:Geography; D033541:Palaemonidae / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics*; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D004272:DNA, Mitochondrial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D004247:DNA