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:
    non sort: The
    title: relationship of germination parameters to field adaptation and heat stress tolerance in Sorghum bicolor (L.) Moench
  name:
    name part: Mann, J. A. (John Arthur)
    role:
      role term: creator
  name:
    name part: Gbur, Edward E.
    role:
      role term: degree committee member.
  name:
    name part: Miller, Frederick R.
    role:
      role term: degree supervisor.
  name:
    name part: Newton, Ronald J.
    role:
      role term: degree committee member.
  name:
    name part: Rooney, Lloyd W.
    role:
      role term: degree committee member.
  name:
    name part: Runge, E. C. A.
    role:
      role term: degree committee member.
  name:
    name part: Smith, James D.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1983
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiii, 152 leaves : illustrations ; 29 cm
  abstract: Four separate but related experiments were conducted in 1981 to 1983 in an effort to expand on and clarify previous research results relating to the base germination temperature of Sorghum bicolor (L.) Moench and that parameter's relationship to adaptation. A second germination parameter was examined to determine if field heat stress tolerance could be screened for by germination tests. A new technique and corresponding statistical model were developed to measure base germination temperature. A second parameter was established which measured sorghum genotypes' ability to withstand very high temperatures (50(DEGREES)C) during germination. These two germination parameters were than used to select F(,4) lines of two R and two B-line crosses for field evaluation at 12 locations extending from Puerto Rico to Nebraska. The agronomic and climatic data from these locations were then used to test the efficacy of the two germination parameters established in the first experiment for predicting adaptation in the first case and field heat tolerance in the second. F(,4) genotypes with high base germination temperatures were earlier to mature, taller, and higher yielding than their sibling lines with low base germination temperatures. These effects were barely discernible in Puerto Rico, but became more obvious in locations which were more temperate in nature. The heat stress tolerance (HST) index was negatively correlated to yield at the hottest locations. A third experiment determined if divergent selection for base germination temperature (G50) and heat stress tolerance (HST) would result in genetic gain in the direction of selection. Only in the case of selection for high HST was divergent selection able to separate significantly F(,4) plants and their selected F(,4) progenies. Low numbers of pairs to test confounded the G50 experiments, as less than 6 F(,5) plants produced sufficient F(,4) seed for testing in either G50 selection scheme. The last experiment was designed to d…
  note: "Major subject: Plant Breeding."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Philosophy Texas A & M University 1983
  note: Includes bibliographical references (leaves 105-112).
  subject:
    topic: Hybrid sorghum
  subject:
    topic: Sorghum
    topic: Breeding
  subject:
    topic: Plant Breeding
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-529126
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-529126
  record info:
    record content source: TXA
    record creation date: 840531
    record change date: 20220103135144.0
    record identifier: in00000525367
    language of cataloging:
      language term: eng