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  • Triticum aestivum  (7)
  • Aegilops sharonensis  (4)
  • In situ hybridisation  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Determination of the transmission frequency of chromosome 4S l of Aegilops sharonensis in a range of wheat genetic backgrounds (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 519-523 
    Details
    ISSN: 1432-2242
    Keywords: Preferential transmission ; Triticum aestivum ; Aegilops sharonensis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The transmission of chromosome 4S l from Aegilops sharonensis was observed in a range of wheat genetic backgrounds. Chromosome 4S l was transmitted at a very high frequency (at least 97.8%) in all crosses. The genetic background appears to only have a small effect on transmission. The frequency of transmission of chromosome 4S l was the same in each genetic background through both the male and female gametes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219443
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The identification of the nucleolus organiser chromosomes of diploid wheat (1983)
    Springer
    Theoretical and applied genetics 65 (1983), S. 145-147 
    Details
    ISSN: 1432-2242
    Keywords: Diploid wheat ; Nucleolus organiser ; In situ hybridisation ; Telocentric markers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The two nucleolus organiser chromosomes of diploid wheat are identified as 1A and 5A by the combination of in situ hybridisation and cytological markers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264881
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  • 3
    Electronic Resource
    Electronic Resource
    The nucleolus organizers of diploid wheats revealed by in situ hybridization (1980)
    Springer
    Theoretical and applied genetics 58 (1980), S. 97-100 
    Details
    ISSN: 1432-2242
    Keywords: Nucleolus organizers ; In situ hybridisation ; Diploid wheats ; Ribosomal RNA genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Labelled RNA, transcribed in vitro from wheat ribosomal DNA cloned in a bacterial plasmid, has been hybridised to metaphase chromosomes of five diploid wheats. Autoradiography of the chromosomes has provided unequivocal evidence that these genotypes possess two pairs of nucleolus organizer chromosomes. The diploid wheat accessions used possess widely differing numbers of ribosomal RNA genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263097
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  • 4
    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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  • 5
    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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  • 6
    Electronic Resource
    Electronic Resource
    The nucleolar organisers of tetraploid and hexaploid wheats revealed by in situ hybridisation (1982)
    Springer
    Theoretical and applied genetics 61 (1982), S. 285-288 
    Details
    ISSN: 1432-2242
    Keywords: Nucleolar organisers ; In situ hybridisation ; Tetraploid and hexaploid wheats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The technique of in situ hybridisation of cloned ribosomal DNA has been used to establish the numbers of nucleolar organising sites in a range of tetraploid and hexaploid wheats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273788
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  • 7
    Electronic Resource
    Electronic Resource
    Cytological analysis on the distribution and origin of the alien chromosome pair conferring blue aleurone color in several European common wheat (Triticum aestivum L.) strains (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 551-558 
    Details
    ISSN: 1432-2242
    Keywords: Triticum aestivum ; Triticum monococcum ; blue aleurone color ; Chromosome substitution/translocation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Meiotic chromosome pairing and Giemsa C-banding analyses in crosses of several European blue-grained wheat strains with Chinese Spring double ditelosomic and other aneuploid lines showed that Triticum aestivum Blaukorn strains “Berlin,” “Probstdorf,” “Tschermak,” and “Weihenstephan” are chromosome substitutions, in which the complete wheat chromosome 4A pair is replaced, whereas the strains “Brünn” and “Moskau” are 4B substitutions. The alien chromosome pair in all of these strains is an A genome chromosome (4A) from diploid Triticum monococcum or T. boeoticum not present in common tetraploid and hexaploid cultivated wheats. The Blaukorn strain Weihenstephan “W 70a86” possesses, in addition to a rye chromosome pair 5R compensating for the loss of part of chromosome 5D, a 4A/5DL translocation replacing chromosome pair 4B of wheat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219448
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  • 8
    Electronic Resource
    Electronic Resource
    The introduction into bread wheat of a major gene for resistance to powdery mildew from wild emmer wheat (1991)
    Springer
    Euphytica 53 (1991), S. 57-60 
    Details
    ISSN: 1573-5060
    Keywords: bread wheat ; Erysiphe graminis ; powdery mildew ; Triticum aestivum ; Triticum dicoccoides ; wild emmer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A new source of resistance to wheat powdery mildew caused by Erysiphe graminis has been transferred to hexaploid bread wheat, Triticum aestivum, from the wild tetraploid wheat, Triticum dicoccoides. The donor was crossed to bread wheat and the pentaploid progeny was then self-pollinated. Plants having a near stable hexaploid chromosome complement were selected in the F3 progeny and topcrossing and backcrossing of these to a second wheat cultivar to improve the phenotype was undertaken. Monosomic analysis of early backcross lines showed the transferred gene to be located on chromosome 4A. The gene has been designated Pm16.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00032033
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  • 9
    Electronic Resource
    Electronic Resource
    Induction of a mutation in the male fertility gene of the preferentially transmitted Aegilops sharonensis chromosome 4S1 and its application for hybrid wheat production (1991)
    Springer
    Euphytica 54 (1991), S. 33-39 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; Aegilops sharonensis ; male sterility ; preferential transmission ; hybrid wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Wheat plants nullisomic for chromosome 4B are male sterile due to the absence of the male fertility gene Ms1. However, plants in which chromosome 4B has been substituted by the preferentially transmitted chromosome 4S1 of Ae. sharonensis are male fertile due to the compensating effect of Ms4 on the alien chromosome. This substitution line has been mutated and three recessive mutation of Ms4 have been selected. Plants homozygous for these mutations are male sterile. The implication of these mutations for hybrid wheat production is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00145628
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  • 10
    Electronic Resource
    Electronic Resource
    An assessment of the potential of 4DS.4DL-4s l L translocation lines as a means of eliminating tall off types in semi-dwarf wheat varieties (1996)
    Springer
    Euphytica 89 (1996), S. 103-106 
    Details
    ISSN: 1573-5060
    Keywords: Aneuploidy ; dwarfing genes ; Triticum aestivum ; preferential transmission ; Aegilops sharonensis ; wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Wheat varieties tend to be chromosomally unstable producing on average 2–3% of plants with abnormal chromosome numbers. A number of semi dwarf wheat varieties, carrying the gibberellic acid insensitive dwarfing genes Rht1 or Rht2, have been seen to produce distinct tall off types due to reduction in dosage of the chromosome carrying the dwarfing gene. The UK variety ‘Brigand’, carrying Rht2 on chromosome 4D, produced very distinct tall off types when this chromosome was reduced in dosage. The frequency of tall off types was sufficiently high to cause the variety to fail United Kingdom statutory uniformity tests. An attempt to prevent the loss of chromosome 4D was made by constructing translocation chromosomes involving the short arm of chromosome 4D, which carries Rht2, and the long arm of chromosome 4S l from Aegilops sharonensis, which carries a gene(s) conferring preferential transmission. The work in this paper describes the field evaluation of two lines carrying 4DS.4DL-4S l L translocations, and demonstrates their success in preventing spontaneously occurring monosomy of chromosome 4D in semi-dwarf wheats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015726
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