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 basis of heterosis in maize
    sub title: genetic correlation and 3-dimensional network between gene expression and grain yield trait heterosis
  name:
    name part: Zhi, Hui.
    role:
      role term: creator
  name:
    name part: Zhan, Hongbin
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2012
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Heterosis, or hybrid vigor, refers to the superiority of F₁ hybrid performance over the mean of its parents (mid-parent heterosis) theoretically, or the performance of better parents. It has been discovered in many species of plants and animals as well as in humans, and played an important role in enhanced agricultural production, especially in maize, rice and sorghum although the mechanism have not been elucidated. We studied the molecular basis of heterosis with a combined genomics and systems biology approach using model organism maize. We profiled the expression of 39 genes that were most differentially expressed (DG) between the mid-parents and their F1 hybrid (Mo17 x B73) in the 13V-satged, developed whole ear shoots of 13 inbred lines and their 22 F1 hybrids grown in the field trails and phenotyped their 13 traits significant for grain yield. The results showed that gene expression varies significantly among inbreds, among hybrids and in heterosis. The gene clustering heat map and gene action networks in inbreds and hybrids were constructed respectively based on their gene expression profile. According to these pattern analyses, we find dramatically difference between inbreds and their hybrids, although the differential expression varies across different hybrids. Our results also suggest that gene networks are altered from inbreds to hybrids, including their gene contents and wire structures. Last but not least, we have determined the genetic variation correlations between the gene expression and trait performance and constructed the gene networks for the development of 12 of the 13 traits that varied significantly among genotypes. This has led to identification of genes significantly contributing to the performances of the traits, with 1-16 genes per trait. These results have indicated that heterosis results not only from altered expression level of corresponding genes between inbreds and their hybrids, importantly, also from the altered gene action networks…
  note: by Hui Zhi.
  note: "Major Subject: Plant Breeding"
  note: Electronic resource.
  note: Master of Science Texas A&M University 2010 http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8766
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major plant breeding
  subject:
    topic: Hybrid Vigor
  subject:
    topic: Phenotype
  subject:
    topic: Gene Expression Variation
  subject:
    topic: Gene and Trait Network
  subject:
    topic: Heterosis
  subject:
    topic: Correlation
  subject:
    topic: Gene Network
  subject:
    topic: Maize
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8766
  record info:
    record content source: TXA
    record creation date: 120313
    record change date: 20151202151738.0
    record identifier: in00002744184