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: Cytotaxonomic relationships in the genera Pennisetum and Cenchrus and the manipulation of apomixis
  name:
    name part: Read, James C. (James Carroll)
    role:
      role term: creator
  name:
    name part: Bashaw, E. C.
    role:
      role term: degree supervisor.
  name:
    name part: Gates, Charles E.
    role:
      role term: degree committee member.
  name:
    name part: Holt, Ethan C.
    role:
      role term: degree supervisor.
  name:
    name part: Niles, G. 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: theses
  genre: Academic theses.
  origin info:
    place:
      place term: txu
    date issued: 1971
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: 40 leaves
  abstract: The cytotaxonomic relationships of buffelgrass and birdwoodgrass were investigated to provide information for taxonomic classification and as a basis for a breeding program with these species. The relationship of these grasses to other species of Cenchrus Pennisetum was also considered. Buffelgrass x birdwoodgrass hybrids were used to study the inheritance of mode of reproduction and to predict the genotype of the birdwoodgrass parent. The results of the cytotaxonomic study indicate that these species are as closely related as individual ecotypes within either species. The parents were found to be completely cross fertile and their hybrids were as fertile as S₁ segregates from the sexual parent. Morphologically there was a rather complete intergradation between the parents. Both parents have the same chromosome number and their meiotic behavior and karyotype appear to be identical. Meiotic behavior in the F₁ hybrids was similar to the parents and there was no loss of chromosomes in advanced generations. Typical buffelgrass type plants were recovered in the advanced generations hybrids with birdwoodgrass type characters were recovered but not in combination to reconstitute the true birdwoodgrass type. Based upon these results the merging of birdwoodgrass and buffelgrass in a single species, Cenchrus ciliaris L. link, is recommended. Birdwoodgrass and hybrids with birdwoodgrass type inflorescences should be designated C. ciliaris var. setigerus (Vahl.) Maire. ...
  note: Ph. D. in Genetics Texas A & M University
  subject:
    topic: Major genetics
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-173068
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-173068
  record info:
    record content source: TXA
    record creation date: 791116
    record change date: 20220103135405.0
    record identifier: in00000161619
    language of cataloging:
      language term: eng