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  • 1
    Electronic Resource
    Electronic Resource
    Standard karyotype of Triticum umbellulatum and the characterization of derived chromosome addition and translocation lines in common wheat (1995)
    Springer
    Theoretical and applied genetics 90 (1995), S. 150-156 
    Details
    ISSN: 1432-2242
    Keywords: C-banding ; Genomic in situ hybridization ; Triticum aestivum ; T. umbellulatum ; Chromosome addition and translocation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A standard karyotype and a generalized idiogram of Triticum umbellulatum (syn. Aegilops umbellulata, 2n = 2x = 14) was established based on C-banding analysis of ten accessions of different geographic origin and individual T. umbellulatum chromosomes in T. aestivum — T. umbellulatum chromosome addition lines. Monosomic (MA) and disomic (DA) T. aestivum — T. umbellulatum chromosome addition lines (DA1U = B, DA2U = D, MA4U = F, DA5U = C, DA6U = A, DA7U = E = G) and telosomic addition lines (DA1US, DA1UL, DA2US, DA2UL, DA4UL, MA5US, (+ iso 5US), DA5UL, DA7US, DA7UL) were analyzed. Line H was established as a disomic addition line for the translocated wheat — T. umbellulatum chromosome T2DS·4US. Radiation-induced wheat — T. umbellulatum translocation lines resistant to leaf rust (Lr9) were identified as T40 = T6BL·6BS-6UL, T41 = T4BL·4BS-6UL, T44 = T2DS·2DL-6UL, T47 = ‘Transfer’ = T6BS·6BL-6UL and T52 = T7BL·7BS-6UL. Breakpoints and sizes of the transferred T. umbellulatum segments in these translocations were determined by in situ hybridization analysis using total genomic T. umbellulatum DNA as a probe
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221010
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  • 2
    Electronic Resource
    Electronic Resource
    Cytogenetical studies in wheat XVI. Chromosome location of a new gene for resistance to leaf rust in a Japanese wheat-rye translocation line (1995)
    Springer
    Euphytica 82 (1995), S. 141-147 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; alien translocation lines ; monosomic analysis ; C-banding ; genomic in situ hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A leaf rust resistant wheat-rye translocation stock, ST-1, introduced from Japan, comprised distinct morphological types. One type possessed a T1BL·1RS chromosome with genes Lr26, Yr9 and Sr31. A second type carried a new gene, Lr45, located in a large segment of rye chromosome translocated to wheat chromosome 2A. Its structure was identified as T2AS-2RS·2RL. Despite the homoeology of the 2A and 2R chromosomes and the high level of compensation provided by the translocation, Lr45 was not normally inherited and is probably associated with agronomic deficiencies that will prevent its exploitation in agriculture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027060
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  • 3
    Electronic Resource
    Electronic Resource
    Characterization of wheat-alien translocations conferring resistance to diseases and pests: current status (1996)
    Springer
    Euphytica 91 (1996), S. 59-87 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat-alien translocation ; resistance ; C-banding ; in situ hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Wild relatives of common wheat, Triticum aestivum, and related species are an important source of disease and pest resistance and several useful traits have been transferred from these species to wheat. C-banding and in situ hybridization analyses are powerful cytological techniques allowing the detection of alien chromatin in wheat. C-banding permits identification of the wheat and alien chromosomes involved in wheat-alien translocations, whereas genomic in situ hybridization analysis allows determination of their size and breakpoint positions. The present review summarizes the available data on wheat-alien transfers conferring resistance to diseases and pests. Ten of the 57 spontaneous and induced wheat-alien translocations were identified as whole arm translocations with the breakpoints within the centromeric regions. The majority of transfers (45) were identified as terminal translocations with distal alien segments translocated to wheat chromosome arms. Only two intercalary wheat-alien transloctions were identified, one induced by radiation treatment with a small segment of rye chromosome 6RL (H25) inserted into the long arm of wheat chromosome 4A, and the other probably induced by homoeologous recombination with a segment derived from the long arm of a group 7 Agropyron elongatum chromosome with Lr19 inserted into the long arm of 7D. The presented information should be useful for further directed chromosome engineering aimed at producing superior germplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035277
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