title: Genetic and host-associated differentiation within Thrips tabaci Lindeman (Thysanoptera: Thripidae) and its links to Tomato spotted wilt virus-vector competence.
abstract: Of eight thelytokous populations of onion thrips (Thrips tabaci) collected from potato (three populations), onion (four) or Chrysanthemum (one) hosts from various regions of Australia, only those from potato were capable of transmitting Tomato spotted wilt virus (TSWV) in controlled transmission experiments. Genetic differentiation of seven of these eight populations, and nine others not tested for TSWV vector competence, was examined by comparison of the DNA sequences of mitochondrial cytochrome oxidase subunit 1 (COI) gene. All Australian populations of T. tabaci grouped within the European 'L2' clade of Brunner et al. (2004). Within this clade the seven populations from potato, the three from onion, and the four from other hosts (Chrysanthemum, Impatiens, lucerne, blackberry nightshade) clustered as three distinct sub-groupings characterised by source host. Geographical source of thrips populations had no influence on genetic diversity. These results link genetic differentiation of thelytokous T. tabaci to source host and to TSWV vector capacity for the first time.
authors: School of Agricultural Science/Tasmanian Institute of Agriculture, University of Tasmania, Hobart Tas, Australia.
authors: G C
authors: GC
authors: Westmore
authors: F S
authors: FS
authors: Poke
authors: G R
authors: GR
authors: Allen
authors: C R
authors: CR
authors: Wilson
mesh_terms: D000818:Animals; D001315:Australia; D003576:Electron Transport Complex IV / Q000235:genetics; D058507:Host Specificity; D019476:Insect Proteins / Q000235:genetics; D007303:Insect Vectors / Q000145:classification / Q000235:genetics* / Q000502:physiology / Q000821:virology; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000469:parasitology / Q000821:virology*; D011198:Solanum tuberosum / Q000469:parasitology / Q000821:virology; D061149:Thysanoptera / Q000145:classification / Q000235:genetics* / Q000502:physiology / Q000821:virology; D017865:Tospovirus / Q000502:physiology*
chemical_list: D019476:Insect Proteins; D003576:Electron Transport Complex IV
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