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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Breeding and evaluation of sorghum bicolor (L.) moench hybrids for adaptation using base metabolic temperature (BMT) as a selection tool
  name:
    name part: Valdes Gutierrez, Jose Armando
    role:
      role term: creator
  name:
    name part: Bockholt, A. J.
    role:
      role term: degree committee member.
  name:
    name part: Miller, F. R.
    role:
      role term: degree supervisor.
  name:
    name part: Morgan, P. W.
    role:
      role term: degree committee member.
  name:
    name part: Rosenow, D. T.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1983
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiii, 140 leaves ; 29 cm
  abstract: Performance and adaptation measurements were obtained for 88 F(,1) sorghum hybrids which were produced by selection from the cross (RT x 7000 x 77CS2), 22 low and 22 high base metabolic temperature (BMT) males and then crossing to 2 female cultivars, one low and one high BMT. Replicated trials were grown near Halfway, Texas (1980), College Station, Texas (1981) and Tampico, Mexico (1980). Mean yields of 5537, 5968 and 7251 kg/ha were obtained at Halfway, College Station and Tampico. Temperature and growing degree days (GDD) from planting to pre-anthesis appeared to affect rate of growth, days to anthesis and hence the length of the growing season. Grain yield of the low x low (L x L) and low x high (L x H) BMT hybrids increased in more tropical locations. The lowest BMT combination (L x L) resulted in the highest mean yield in Tampico, the most tropical location. BMT was negatively associated with grain yield.Hybrid combinations L x L and L x H produced greater numbers of seed per panicle, were 5 to 6 cm taller and had longer panicles, superior leafiness ratings, better plant desirability ratings, and greater panicle weights than H x H and H x L combinations at all locations. H x H and H x L hybrids had greater 1000 seed weights and superior test weights. The H x H and H x L combinations required 3 to 4 more days to reach 50% anthesis at Halfway than L x L or L x H combinations. Plantings at College Station and Tampico gave opposite results than obtained at Halfway. In general, H x H and H x L hybrids flowered earliest in lower latitude while L x L and L x H were latest. In addition, H x H and H x L hybrids had higher threshing percentages at Halfway while at Tampico the L x L and L x H hybrids were highest. Plant height, plant desirability rating, panicle weight, 1000 seed weight and number of seeds per panicle were highly correlated and should be considered by the plant breeder in developing high yielding sorghums. The following characteristics were correlated wit…
  note: "Major subject: Plant Breeding."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Philosophy Texas A & M University 1983
  note: Includes bibliographical references (leaves 97-104).
  subject:
    topic: Hybrid sorghum
  subject:
    topic: Sorghum
    topic: Breeding
  subject:
    topic: Plant Breeding
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-529125
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-529125
  record info:
    record content source: TXA
    record creation date: 840531
    record change date: 20220103135145.0
    record identifier: in00000525366
    language of cataloging:
      language term: eng