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  • 1
    Electronic Resource
    Electronic Resource
    Interspecific variation in C-banded chromosomes of diploid Aegilops species (1983)
    Springer
    Theoretical and applied genetics 65 (1983), S. 31-40 
    Details
    ISSN: 1432-2242
    Keywords: C-banding ; Improved technique ; Diploid Aegilops ; Genome symbols ; Heterochromatin repatterning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Based on an improved C-banding technique, the C-banding patterns of all 11 diploid Aegilops species were described and compared. All diploid species exhibit characteristically different patterns which enable the chromosomes of any complement to be identified individually. These patterns confirm existing genome symbols and provide further evidence for the suggested changes in genome symbols of Ae. umbellulata and Ae. sharonensis, U and Ssh respectively. Furthermore, Ae. uniaristata should be given a separate symbol, probably N. Aegilops speltoides and Ae. sharonensis could be possible donors to the B genome of wheat. Interspecific divergence in these diploid species has been accompanied by either amplification or deletion as well as massive repatterning of heterochromatin from the centromere to the telomere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276259
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of a preferentially transmitted Aegilops sharonensis chromosome in wheat (1982)
    Springer
    Theoretical and applied genetics 61 (1982), S. 27-33 
    Details
    ISSN: 1432-2242
    Keywords: Preferential transmission ; In situ hybridization ; C-banding ; Aegilops sharonensis ; Wheat ; Addition ; Substitution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An attempt to produce a set of addition lines of Aegilops sharonensis to the wheat variety ‘Chinese Spring’ produced only one addition line. This was due to preferential transmission of one chromosome from Ae. sharonensis. This chromosome was studied in detail by established cytological methods of chromosome observation and by the newer techniques of C-banding and in situ hybridization of a cloned DNA sequence. The chromosome was found to be partially homologous to an Ae. sharonensis chromosome of similar behaviour in another wheat addition line. The incomplete homology of the two Ae. sharonensis chromosomes was due to the presence of a translocated segment of a wheat chromosome. — Substitution lines of the Ae. sharonensis chromosome for wheat homoeologous group 4 were produced and the Ae. sharonensis chromosome thereby designated 4 S l .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261506
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of the chromosomes of Triticum timopheevi with related wheats using the techniques of C-banding and in situ hybridization (1982)
    Springer
    Theoretical and applied genetics 64 (1982), S. 31-40 
    Details
    ISSN: 1432-2242
    Keywords: Triticum timopheevi ; Chromosomes ; C-banding ; In situ hybridisation ; Heterochromatin ; Translocation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The chromosomes of the tetraploid wheats Triticum timopheevi (Genome AAGG) and T. araraticum (Genome AAGG) were C-banded at mitosis. The identity of the banded and unbanded chromosomes was then established by firstly making comparisons with the hexaploid species T. zhukovskyi which has the genome formula AAAAGG. Secondly, the meiotic pairing in F1 hybrids between T. timopheevi and diploid wheats was examined by means of C-banding. The results showed that the banded chromosomes belonged to the G genome, while the unbanded chromosomes belonged to the A genome. Only one of the two pairs of satellited chromosomes had strong heterochromatic bands. The relationship between the genomes of T. timopheevi and T. dicoccum (Genome AABB) was then assessed at meiosis in hybrids between these species, using the techniques of C-banding and in situ hybridisation of a cloned ribosomal RNA gene probe. It was concluded that there were differences both in the amount and distribution of heterochromatin and also translocation differences between the species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303647
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