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  • Triticum durum  (1)
  • Wide hybridization  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Production, morphology, and cytogenetics of Triticum aestivum (L.) Thell × Elymus scabrus (R. Br.) Love intergeneric hybrids obtained by in ovulo embryo culture (1991)
    Springer
    Theoretical and applied genetics 81 (1991), S. 833-839 
    Details
    ISSN: 1432-2242
    Keywords: Apomixis ; Chromosome pairing ; Elymus ; Wheat ; Wide hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Intergeneric hybrids were produced between common wheat, Triticum aestivum (2n=6x=42, AABBDD), and an apomictic Triticeae species, Elymus scabrus (syn. Agropyron scabrum) (2n=6x=42, HHSSSS), the first successful report of this cross. Nine tiny, underdeveloped, and structureless embryos were obtained in vitro only by in ovulo embryo culture at 4 days after pollination, which gave rise to five mature hybrid plants. All the hybrid plants were vigorous and possessed a phenotype intermediate to the two parents. There were 2n=6x=42 (ABDHSS) somatic chromosomes in the hybrids. There was little or no homology between the parental genomes, as shown by an overall meiotic chromosome association of 32.83 I + 4.08 rod II + 0.21 ring II + 0.18 III + 0.02 IV. The hybrids were completely sterile and so far backcrosses to wheat parent have not been successful. Alternate approaches to induce gene transfer(s) from E. scabrus to wheat are being attempted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224998
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic variation for tolerance or resistance to barley yellow dwarf virus in durum wheat (1989)
    Springer
    Euphytica 40 (1989), S. 213-220 
    Details
    ISSN: 1573-5060
    Keywords: Triticum durum ; durum wheat ; germplasm ; genetic resources ; BYDV ; barley yellow dwarf virus tolerance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary One durum wheat line (Triticum durum), cv. 82PCD476, with useful BYDV tolerance or resistance, was singled out of 5 152 lines evaluated between 1979 and 1986. A few other lines such as cv. Boohai and cv. 12th IDSN 227, slightly inferior to cv. 82PCD476, also showed some value. With an hybrid of cv. 12th IDSN227 with the susceptible cv. 84PCY-S531, broad-sense heritability values of 0.37–0.41 were obtained for symptoms and a heritability value of 0.55 was obtained for the total weight of spikes. The weight of spikes was considered as a good indicator of wheat tolerance to BYDV. Although BYDV resistance or tolerance genes are not very common in durum wheat, sources of heritable resistance could be found. However, the resistance ofT. aestivum to BYDV was superior to the one found inT. durum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024514
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    Paper (German National Licenses)
    Fulltext
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