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  • Centromere activity  (1)
  • Gene regulation  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Distribution and clustering of two highly repeated sequences in the A and B chromosomes of maize (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 234-239 
    Details
    ISSN: 1432-2242
    Keywords: Maize ; Repetitive DNA ; A and B chromosomes ; Centromere activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Clones from a family of highly repeated sequences present in a heterochromatin rich maize line have been characterized by sequencing and chromosome location. The repeats differ from each other in length and degree of sequence homology, and show areas rich in purine and pyrimidine. In “situ” hybridization experiments indicate that the repeats are mainly located in the knob heterochromatin of the A chromosomes and the centromeric heterochromatin of the B chromosome. However, in addition to previously published data, some copies are also distributed in euchromatic regions of the A chromosomes and in the distal heterochromatic block of the B chromosome. The results are discussed in relation to the centromeric activity of maize heterochromatin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304904
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Linkage relationships between regulatory and structural gene loci involved in zein synthesis in maize (1978)
    Springer
    Theoretical and applied genetics 52 (1978), S. 263-267 
    Details
    ISSN: 1432-2242
    Keywords: Zein synthesis ; Gene regulation ; Opaque-2 ; linkage relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The synthesis of at least 15 zein polypeptides is under the control of regulatory gene loci. One of these, Opaque-2 (chromosome 7, position 16) strongly reduces the zein accumulation without modifying the zein molecular components. The linkage relationship between the regulatory gene 02 and the 5 structural loci (Zp1, Zp2, Zp3, Zp6, Zp12) segregating with sample Mendelian ratios have been studied. Zp1, Zp2, Zp3 are closely linked to each other; moreover this gene cluster is located on chromosome 7 at 5.5 cM from the Opaque-2 locus. The structural loci Zp6 and Zp12 are not linked with each other, with the 02 locus or with Zp1, Zp2, Zp3. From our data it follows that the zein structural genes are located in at least three positions on the maize genome. The scattering in the genome of the genes controlled by the Opaque-2 locus suggests a transacting role for this regulatory element.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303503
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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