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  • Analytical Chemistry and Spectroscopy  (1)
  • Catalytic transformation  (1)
  • Chemistry  (1)
  • Empresas  (1)
  • Key words  Stable resistance   (1)
  • Pyricularia grisea  (1)
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  • 1
    ISSN: 1432-2242
    Keywords: Key words  Stable resistance  ;  Doubled haploids  ; Pyricularia grisea  ;  Breeding  ;  Categorical data analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract   Crosses were made between Fanny (highly susceptible to blast) and 11 cultivars differing in blast resistance. Using the pedigree method (PM) segregating generations were evaluated and selected for blast resistance. Via anther culture (AC), doubled-haploids were obtained from F1 plants and from F2 blast-susceptible plants. Pedigree and anther culture-derived lines were planted together and evaluated for blast resistance under rainfed conditions at the Santa Rosa Experiment Station, Villavicencio, Colombia. The principal objective was to compare PM and AC in terms of their efficiency in producing rice lines resistant to blast. Results of a stratified analysis showed an association between method and blast resistance. Results of the logit-model analysis showed that AC produced a significantly (P=0.0001) higher proportion of lines with initial blast resistance (leaf- and neck-blast reaction ≤4) than did PM across all cross types. Stable blast resistance was assessed based on field performance over 3 years. AC was superior to PM in generating stable resistance for only some cross types. Consequently, with a few exceptions, AC can be used as effectively as PM to develop rice cultivars resistant to blast, with savings in time and labor. Additionally, blast-resistant lines were obtained either by the pedigree method or by anther culture from crosses between blast-susceptible cultivars (Fanny/CICA4 and Fanny/Colombia1). This excludes somaclonal variation as a possible mechanism responsible for this resistance and suggests that a recombination of minor genes could have occurred and was fixed through either method. However, the stability of the resistance was greater in pedigree-derived lines. The implications of these findings for rice blast-resistance breeding are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2242
    Keywords: Stable resistance ; Doubled haploids ; Pyricularia grisea ; Breeding ; Categorical data analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Crosses were made between Fanny (highly susceptible to blast) and 11 cultivars differing in blast resistance. Using the pedigree method (PM) segregating generations were evaluated and selected for blast resistance. Via anther culture (AC), doubled-haploids were obtained from F1 plants and from F2 blast-susceptible plants. Pedigree and anther culture-derived lines were planted together and evaluated for blast resistance under rainfed conditions at the Santa Rosa Experiment Station, Villavicencio, Colombia. The principal objective was to compare PM and AC in terms of their efficiency in producing rice lines resistant to blast. Results of a stratified analysis showed an association between method and blast resistance. Results of the logit-model analysis showed that AC produced a significantly (P=0.0001) higher proportion of lines with initial blast resistance (leaf- and neck-blast reaction ≤4) than did PM across all cross types. Stable blast resistance was assessed based on field performance over 3 years. AC was superior to PM in generating stable resistance for only some cross types. Consequently, with a few exceptions, AC can be used as effectively as PM to develop rice cultivars resistant to blast, with savings in time and labor. Additionally, blast-resistant lines were obtained either by the pedigree method or by anther culture from crosses between blast-susceptible cultivars (Fanny/CICA4 and Fanny/Colombial). This excludes somaclonal variation as a possible mechanism responsible for this resistance and suggests that a recombination of minor genes could have occurred and was fixed through either method. However, the stability of the resistance was greater in pedigree-derived lines. The implications of these findings for rice blast-resistance breeding are discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 501-503 
    ISSN: 0935-6304
    Keywords: High resolution GC-MS ; Mass spectrometry ; Anise oil ; Catalytic transformation ; Zeolite Y ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 2024-03-29
    Description: The progress of a society depends to a great extent on the level of competitiveness of the business sector, since the investments and decisions of the private sector determine to a great extent the evolution and growth of the economy. Likewise, sustainable development must go substantially hand in hand with competitiveness, while simultaneously ensuring the maintenance of resources for future generations, in other words, it is not positive to be competitive while devastating the assets currently owned. The book "Business competitiveness: a contribution to economic growth and sustainable development" focuses on the analysis of those tools, situations, strategies and conditions that contribute to the economic and sustainable development of the Cordoba region.
    Description: Published
    Description: El avance de una sociedad depende en gran medida del nivel de competitividad que el sector empresarial posea, ya que las inversiones y decisiones del sector privado determinan en gran medida la evolución y crecimiento de la economía. Así mismo, el desarrollo sostenible debe ir sustancialmente de la mano con la competitividad, velando simultáneamente por el mantenimiento de los recurso para la futuras generaciones, en otros términos no es positivo ser competitivos mientras se devastan los bienes que se poseen en la actualidad. El libro La competitividad empresarial: un aporte al crecimiento económico y al desarrollo sostenible, enfoca su sentido en el análisis de aquellas herramientas, situaciones, estrategias y condiciones que coadyuvan al desarrollo económico y sostenible de la región Cordobesa.
    Keywords: Competitividad ; Empresas ; Economía ; thema EDItEUR::K Economics, Finance, Business and Management
    Language: Spanish
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