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  • 1990-1994  (2)
  • 1965-1969
  • 1955-1959
  • 1880-1889
  • Conidiation  (1)
  • Fishes  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Genetic requirements for initiating asexual development in Aspergillus nidulans (1994)
    Springer
    Current genetics 27 (1994), S. 62-69 
    Details
    ISSN: 1432-0983
    Keywords: Conidiation ; Fungi ; brlA ; Microbial development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Conidiation in the filamentous ascomycete Aspergillus nidulans requires activation of brlA, a well-characterized transcriptional regulator of genes that are induced specifically during asexual development. We have isolated and characterized developmental mutations in six loci, designated fluG, flbA, flbB, flbC, flbD, and flbE, that result in defective development and reduced brlA expression. These mutants grow indeterminately to produce masses of aerial hyphae resulting in the formation of cotton-like colonies with a “fluffy” morphology. The results of growth and epistasis tests involving all pairwise combinations of fluffy mutations indicate complex hierarchical relationships among these loci. We discuss these genetic interactions and propose that there are multiple mechanisms for activating brlA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326580
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Chromosome study of hybrid and gynogenetic offspring of artificial crosses between members of the catfish families Clariidae and Pangasiidae (1993)
    Springer
    Environmental biology of fishes 37 (1993), S. 317-322 
    Details
    ISSN: 1573-5133
    Keywords: Interfamilial hybridization ; Hybrid morphotypes ; Triploid ; Clarias macrocephalus ; Pangasius sutchi ; Fishes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Artificial hybridization between species of the catfish families Clariidae (Clarias macrocephalus) and Pangasiidae (Pangasius sutchi) resulted in first generation offspring comprising two intermediate morphotypes and one morphotype indistinguishable from its clariid parent. The two intermediate morphotypes apparently correspond to hybrid morphotypes 2 and 4 resulting from earlier hybridization experiments between the same parent species (Tarnchalanukit 1986). We did not obtain morphotypes 1 and 3. Chromosome spreads of the relatively pangasiid-like morphotype 2 reveal a diploid number of 57, presumably comprising one set of Clarias (n=27) and one of Pangasius (n=30) chromosomes. The relatively clariid-like morphotype 4 is a triploid with 84 chromosomes, presumably comprising two sets from Clarias (2n=54) and one from Pangasius (n=30). Finally, the morphotype indistinguishable from Clarias, is a diploid with 54 chromosomes, apparently arising from gynogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00004639
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    Paper (German National Licenses)
    Fulltext
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