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  • Induced Mutation for Improving Cascade and Centennial Hop

    Creator:
    Getty, Brooke A.
    Abstract:
    Hop, Humulus lupulus L. is a dioecious perennial species. The female hop plant produces flowers that mature into ‘cones’ which are used as a raw material in the beer brewing process to impart bitterness, flavor, and aroma. The craft beer industry in the current global beer market continues to experience...
    Resource Type:
    Masters Thesis
    Full Text:
    . Mutation-based breeding has the potential to improve well-adapted hop cultivars by modifying relatively

  • The feasibility of using diploid by tetraploid crosses to obtain triploid hops (Humulus lupulus L.)

    Creator:
    DeNoma, Jeanine Streeter
    Abstract:
    The hop (Humulus lupulus L.) is a dioecious, diploid (2n=2x=20) species. Triploid hops (2n=3x=30) are easily obtained from tetraploid by diploid crosses and are preferred because of their natural seedlessness and increased vigor. The female inflorescence is used for flavoring beer. Because brewers require product consistency, the brewing characteristics of...
    Resource Type:
    Masters Thesis
    Full Text:
    (Haunold, 1974). Many hop breeding programs now focus on producing high yielding, naturally seedless

  • Characterization of an architectural mutant of bean (Phaseolus vulgaris, L.)

    Creator:
    Guner, Nihat
    Abstract:
    Genetic and morphological characteristics of an architectural mutant in common beans were studied. The mutant had shiny, dark green leaves, overlapping leaflets, short petioles and a reproductive terminal bud even though the line did not carry the fin gene. Branching was nearly absent resulting in a single stem vine. This...
    Resource Type:
    Masters Thesis
    Full Text:
    systems, less energy is used in the direct harvest system (Smith, 1996). Most breeding programs for

  • Inducing and Evaluating Phenotypic and Cytometric Variation in Landscape Plants : Observations from Acer, Ornithogalum, and Penstemon

    Creator:
    Lattier, Kim Shearer
    Abstract:
    Hereditary variation is a vital component in the development of new and improved cultivars of landscape plants. Sources of hereditary variation include naturally occurring variation, recombination due to controlled crosses, artificial mutagenesis, and genetic modification via biotechnology. Here I explore all methods with the exception of genetic modification via biotechnology....
    Resource Type:
    Masters Thesis
    Full Text:
    dwarfing (Maluszynski et al., 1992). The widespread use of irradiation-mediated mutation breeding is