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: Molecular Characterization of the Texas Maize Breeding Program
  name:
    name part: Smith, Schuyler
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Murray, Seth C.
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2015
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: The Texas maize breeding program at Texas A&M University has been unique among breeding programs for the incorporation of a wealth of germplasm from a wide range of origins into inbred lines. The Texas program, situated in a subtropical environment, has found beneficial traits beyond what is seen in the temperate material commonly used in the far more productive Midwestern region of the United States from maize of tropical origin. To date, no molecular studies had been conducted to make any quantitative differentiations between the genetic diversity in the germplasm developed in the Texas program or compared to the germplasm commonly used in breeding programs from the Midwest. In this study a molecular characterization of genetic diversity was performed. A unique set of 266 lines were selected and genotyped using 766 single nucleotide polymorphism markers and was combined with data published in a similar study focusing on ex-PVP lines released by private companies. The two data sets combined to have 380 genotypes with 635 markers. It was determined from the results of the genotyping that there were five subpopulations of material as determined by population structure. A principal coordinate analysis showed only 18% of the variation could be explained by the first two principal components. This suggested that the array markers, designed to cluster the Midwestern heterotic groups did not discriminate this exotic material well and/or that the heterotic pools were not well supported. We conclude that the Texas program material shows dissimilar genetic results when compared to Midwest temperate material and has the ability to act as a source of unique genetics for other maize breeding program. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155199
  note: by Schuyler Smith.
  note: "Major Subject: Plant Breeding"
  note: Includes vita.
  note: Master of Science Texas A & M University 2015 http://hdl.handle.net/1969.1/155199
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major Plant Breeding
  subject:
    topic: Molecular characterization
  subject:
    topic: diversity study
  subject:
    topic: subtropical
  subject:
    topic: tropical
  subject:
    topic: maize
  subject:
    topic: SNP array
  subject:
    topic: Texas
  subject:
    topic: PCoA
  subject:
    topic: STRUCTURE
  identifier: http://hdl.handle.net/1969.1/155199
  record info:
    record content source: TXA
    record creation date: 160308
    record change date: 20170928112504.0
    record identifier: in00003610407
    language of cataloging:
      language term: eng