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: Agronomic differences in growth and yield between BT and conventional cotton treated with mepiquat chloride
  name:
    name part: Underbrink, Shelley Marie
    name part: 1974-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1999
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: xv, 142 leaves : illustrations ; 28 cm.
  abstract: Cotton (Gossypium hirsutum L.), an indeterminacy plant, may exhibit rank vegetative growth under conditions of high fertility and high moisture. Traditionally, mepiquat chloride (l,l-dimethylpiperidinium chloride) has been applied to cotton for suppressing vegetative growth. Mepiquat chloride (MC) blocks the biosynthesis of the hormone gibberellic acid. Applications of MC produce plants that are consistently shorter than control plants due to decreased stem elongation. Cotton cultivate containing a gene that encodes an insecticidal protein were released commercially during 1996. The gene, transferred from the bacterium Bacillus thuringiensis, proved especially effective in reducing cotton damage caused by lepidopteran insects. However, Bt cotton cultivate exhibit rank vegetative growth. Current crop simulation models suggest that ten to twelve mg MC per kg of biomass is required for reducing main stem elongation in conventional cotton. However, Bt cultivate may behave differently toward MC than conventional cultivars. To test this hypothesis, a field experiment was conducted at the Texas Agricultural Experiment Station--Corpus Christi during 1997 and 1998. The factorial field experiment, which consisted of two cultivate and five rates of MC, was arranged as a randomized complete block with four replications. The cultivars planted included a Bt cultivar(DPL 33[]) and the same cultivar without the Bt gene (DPL 5415). MC was applied to the cotton near the 12-node stage at 15.3, 30.6, 45.9, and 61.2 g a.i. ha⁻¹. Data collected in the experiment included plant height, node number, dry weight, yield, and plant mappings. Data were analyzed using regression, ANOVA, LSD, and ANCOVA. Significant differences in plant height were observed between the different MC rates. The control plants were the tallest, followed by plants treated with the 15.3, 30.6, 45.9, and 61.2 g a.i. ha⁻¹ rates, respectively. No significant differences in the growth rate and height were detected between…
  note: by Shelley Marie Underbrink.
  note: "Major subject: Agronomy".
  note: Vita.
  note: Also available online.
  note: Issued also on microfiche from Lange Micrographics.
  note: M.S. Texas A&M University 1999.
  note: Includes bibliographical references (leaves 126-134).
  subject:
    topic: Major agronomy
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-U53
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-U53
  record info:
    record content source: TXA
    record creation date: 000405
    record change date: 20220103134549.0
    record identifier: in00001526724