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: Improvement of Work-to-Break Characteristics of Cotton (Gossypium hirsutum L.) Fibers and Yarn through Breeding and Selection for Improved Fiber Elongation
  name:
    name part: Osorio Marin, Juliana
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Hague, Steve
    role:
      role term: thesis advisor.
  name:
    name part: Dever, Jane
    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: 2013
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource (183 pages)
  abstract: The development of cottons with improved fiber quality has been a major objective in breeding programs around the world. Breeders have focused their attention on improving fiber strength and length, and have generally not used fiber elongation in the selection process. Although literature has reported a negative correlation between fiber elongation and tenacity, this correlation is weak and should not prevent breeders from simultaneously improving fiber tenacity and fiber elongation. Furthermore, the work of rupture property, important in the spinning process, could be best enhanced by improving both fiber tenacity and fiber elongation. Fifteen populations were developed in 2007 by crossing good quality breeding lines with high elongation measurements to 'FM 958'; a High Plains standard cultivar with good fiber quality but reduced elongation. Samples in every generation were ginned on a laboratory saw gin, and the lint was tested on HVI (High Volume Instrument). The F2 and F3 generations showed a wide range of variation for elongation (6.9% - 12.8% for the F2 and 4% - 9.20% for the F3) allowing divergent selection for low and high fiber elongation. A correlation (r) of -0.32 between strength and elongation was observed in the F2 individual plant selections. In the F3, the correlation (r) between strength and elongation was -0.36, and in the F4 the correlation (r) was -0.08. Nine lines were selected from the original 15 populations for spinning tests. The correlation between fiber elongation and strength for these lines was positive (r=0.424), indicating that with targeted selection, fiber elongation and strength can be simultaneously improved. Fiber elongation was positively correlated with yarn tensile properties tenacity (r=0.11), work-to-break (r=0.68) and breaking elongation (r=0.87); and was negatively correlated with yarn evenness properties, number of thin places (r=-0.16), number of thick places (r=-0.9), nep count (r=-0.24), hairiness (r=-0.38) and total nu…
  note: by Juliana Osorio Marin.
  note: "Major Subject: Plant Breeding"
  note: Includes vita.
  note: Doctor of Philosophy Texas A & M University 2012 http://hdl.handle.net/1969.1/148196
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Plant Breeding
  subject:
    topic: Yarn spinning
  subject:
    topic: Heritability
  subject:
    topic: Cotton fiber quality
  subject:
    topic: Plant breeding
  subject:
    topic: Fiber elongation
  identifier: http://hdl.handle.net/1969.1/148196
  record info:
    record content source: TXA
    record creation date: 131220
    record change date: 20151206090700.0
    record identifier: in00003343026
    language of cataloging:
      language term: eng