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: Apomixis in sorghum
    sub title: mode of reproduction, inheritance, and improvement of apomictic frequency
  name:
    name part: Tang, Ching-Yan.
    role:
      role term: creator
  name:
    name part: Bashaw, Elixis C.
    role:
      role term: degree supervisor.
  name:
    name part: Gilmore, E. C.
    role:
      role term: degree committee member.
  name:
    name part: Magill, C. W.
    role:
      role term: degree committee member.
  name:
    name part: Schertz, Keith F.
    role:
      role term: degree supervisor.
  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: txu
    date issued: 1977
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 142 leaves : illustrations ; 28 cm
  abstract: Five selected sorghum (Sorghum bicolor (L.) Moench) lines, R473, Polygynaceous line (PGY), White seed mutant (WS), South Dakota line (Experimental 3-58) (SD), and Double haploid of 'Tx403' (DH) were studied for mode of reproduction, inheritance of apomixis, and the effects of sexual suppressants on apomictic frequency. This information was used to assess the potential for use of apomixis in sorghum breeding. Two approaches were used for detecting apomixis, namely, embryo sac analyses (paraffin section method and ovule squash method), and progeny evaluation (test crosses and progeny tests). Advantages and disadvantages of these techniques were discussed. Choice of the technique depends on the materials available and the objectives of the study. Apomixis was observed in the five sorghum lines studied. Sexual reproduction was found along with apomixis in each line. Nucellar activity occurred at various stages of embryo sac development. The mechanism of apomixis in sorghum was a type of facultative apospory. R473 had the highest apomictic frequency (22.8%) as determined by embryo sac analyses. Degeneration of the embryo sac mother cells was noticed in some ovules at the early stages of development. R473 was incompatible; thus no test crosses were obtained. Use of apomixis from this line depends on the success of isolating apomictic lines which are not incompatible..
  note: by Ching-Yan Tang.
  note: "Major subject: Plant Breeding."
  note: Vita.
  note: Texas A & M University
  note: Includes bibliographical references (leaves 137-141).
  subject:
    topic: Apomixis
  subject:
    topic: Sorghum
    topic: Breeding
  subject:
    topic: Plant Breeding
  subject:
    topic: Apomixis
  subject:
    topic: Sorghum
    topic: Breeding
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-358510
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-358510
  record info:
    record content source: TXA
    record creation date: 771003
    record change date: 20220103135418.0
    record identifier: in00000354441
    language of cataloging:
      language term: eng