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: Role of Genome Size Variation in Speciation of North American Cyprinid Fishes
  name:
    name part: Schliesing, Laura Jo.
    role:
      role term: creator
  name:
    name part: Gold, John Rush
    role:
      role term: degree supervisor.
  type of resource: software, multimedia
  genre: Undergraduate thesis
  origin info:
    place:
      place term: txu
    date issued: 1984
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    extent: 1 online resource (25 pages).
  abstract: An important question in evolutionary biology today is exactly how and when do the genetic changes which accompany evolutionary divergence occur? This study examines two competing hypotheses, with the major difference between the two being the tempo in which organismal and or genetic changes occur. The traditional view that most evolutionary change is gradual and cummulative within lineages - phyletic gradualism - is challenged by the more recent theory that the majority of evolutionary change is concentrated within speciation episodes - rectangular evolution. These two models lead to distinct predictions of mean amounts of genetic distance between species in species-rich versus species-poor phylads of equal evolutionary age. Genetic distance may be measured with any of a number of quantifiable parameters, i.e. gross karyotype, structural genes, morphologies, or DNA. In this study, the DNA of North American cyprinid fishes (minnows) was examined quantitatively. Results were consistent with earlier work done with these fishes using different parameters of measurement. Despite the extensive speciation of Cyprinidae, changes in nuclear genome size, as well as karyotypic, structural gene, and morphological changes do not support a rectangular mode of evolution.
  target audience: specialized
  note: Undergraduate thesis written for Program year: 1983-1984
  note: Digitized from print version held at Pickle Center High Density Storage, HDR barcode A14851268137
  note: University Undergraduate Fellows, sponsored by Biology Department.
  note: HDR
  subject:
    topic: Cyprinidae
  subject:
    topic: evolutionary divergence
  subject:
    topic: minnows
  subject:
    topic: mode of evolution
  identifier: https://oaktrust.library.tamu.edu/handle/1969.1/CAPSTONE-SchliesingL_1984
  record info:
    record creation date: 231116
    record change date: 20240311193116.1
    record identifier: in00004782095