rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Characterization of Sclerotinia minor populations in Texas
  name:
    name part: Henry, Merribeth Annette.
    role:
      role term: creator
  name:
    name part: Kenerley, Charles M.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2010
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource.
  abstract: Agriculture is a crucial component of the economy of Texas with millions of pounds of peanuts, cotton, wheat, and corn produced annually. However, Texas agricultural crops are not exempt from pathogens, especially Sclerotinia minor Jagger, which was introduced into Texas approximately 25 years ago. A dramatic increase in S. minor disease incidence in the High Plains of Texas during 2004 provided the basis for this study of the pathogen populations in Texas. To characterize the S. minor populations in Texas, aggressiveness and fungicide sensitivity assays were conducted to assess phenotypic characteristics as well as the use of five microsatellite markers to genotypically characterize the pathogen. A large diversity among the populations was found for the phenotypic characteristics; however, there was no evidence that a genotypically unique, highly aggressive, and fungicide resistant "super pathogen" had been introduced or evolved. The populations of S. minor in Texas were moderately aggressive (26.15% of infected tissue), but there were also isolates found that have the inability to infect peanuts (less than 3% of infected tissue) as well as highly aggressive pathogens with theAll fungicides tested were effective in limiting the growth of the pathogen; however, there were significant differences in the effectiveness of the fungicides. Thiophanate-methyl and dichloran were the least effective fungicides in inhibiting the growth of S. minor while boscalid, iprodione, and fluazinam were the best. Fluazinam exerted the most lasting suppressive effect on pathogen. A positive correlation between aggressiveness and fungicide sensitivity to fluazinam and boscalid was found; therefore, no ecological tradeoff was found when increasing these two phenotypic characteristics. Whereas extensive genotypic diversity (50 unique genotypes) was found in Texas, the predominate pathogen was a clone. Genotype TX1 was a clone that accounted for more than 48% of genotypes in Texas populatio…
  note: by Merribeth Annette Henry.
  note: "Major Subject: Plant Pathology"
  note: Title from author supplied metadata (automated record created 2010-03-12 12:08:51).
  note: Electronic resource.
  note: Master of Science Texas A&M University 2006 http://hdl.handle.net/1969.1/ETD-TAMU-1843
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major Plant Pathology
  subject:
    topic: Sclerotinia minor
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-1843
  record info:
    record content source: TXA
    record creation date: 100430
    record change date: 20151201150230.0
    record identifier: in00002557953