Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles: DFG German National Licenses  (4)
  • Chromosome pairing  (4)
Source
  • Articles: DFG German National Licenses  (4)
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    New hybrids of Hordeum parodii with Hordeum vulgare, H. bogdanii, Agropyron caninum and X Triticosecale (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 265-270 
    Details
    ISSN: 1432-2242
    Keywords: Hordeum ; Agropyron ; X Triticosecale ; Interspecific and intergeneric hybrids ; Chromosome pairing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hybrids were produced from crossing Hordeum vulgare, H. bogdanii, Agropyron caninum and × Triticosecale onto H. parodii (6x or 4x). The rates at which hybrids were produced, expressed in terms of plantlet establishment as percent pollinated florets, ranged from 0.47%, (6x H.parodii × 6x × Triticosecale cv. ‘Welsh’) to 6.3% (4x H. parodii × 2x H. vulgare cv. Betzes). Based on frequencies of paired configurations at MI, autosyndetic pairing appeared to be promoted by the presence of a Secale cereale genome but suppressed by the genome of H. vulgare.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304910
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Analysis of the effect of rye chromosomes 4R, 6R and telomeric heterochromatin on 7R on homologous chromosome pairing in pentaploid hybrids (AABBR, AABBD) (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 816-821 
    Details
    ISSN: 1432-2242
    Keywords: Triticum ; x Triticosecale ; Secale ; Rye ; Meiosis ; Chromosome pairing ; Heterochromatin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Meiotic pairing in Triticum turgidum cv. Ma (4x) with a mean chiasmata frequency of 27.16 per cell was compared with chiasmata frequencies in its hybrids with several triticale strains, ‘Chinese Spring’ wheat and its addition lines for ‘Imperial’ rye chromosomes 4R and 6R. In hybrids between ‘Ma’ and x Triticosecale cv. ‘Rosner’ the chiasmata frequency was marginally reduced by an average of 1.25%, by 8.8% in hybrids with x Triticosecale cv. ‘DRIRA’ HH and by 6.7% with ‘DRIRA’ EE (lacking 90% telomeric heterochromatin from chromosome arm 7RL). In pentaploid hybrids between ‘Ma’ and T. aestivum cv. ‘Chinese Spring’ the reduction was an average of 10.30%, while addition lines with rye chromosome 6R reduced chiasmata frequencies by an average of 7.4% and rye addition line for 4R showed the greatest depression in chiasmata frequency in hybrids by a 25.04% reduction. An interchange difference involving long chromosome segments was observed between ‘Ma’ and ‘Rosner’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266551
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Production and cytogenetics of hybrids of Triticum aestivum x Leymus innovatus (1989)
    Springer
    Theoretical and applied genetics 78 (1989), S. 436-444 
    Details
    ISSN: 1432-2242
    Keywords: Intergeneric hybrids ; Wheat ; Leymus ; Chromosome pairing ; Meiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Hybrid plants were obtained between Triticum aestivum (2n=6x=42, AABBDD) and Leymus innovatus (2n=4x=28, JJNN) at a frequency varying from 0.4% to 1.2% of the pollinated florets. Improvement of the embryo culture medium resulted in a higher frequency of embryo rescue. Eight of ten hybrids had the expected chromosome number of 35 (ABDJN). Meiotic analysis indicated that there was no homology between the genomes of the two species. Two hybrids had only 28 chromosomes. Comparison of chromosome pairing between the two types of hybrids suggested that Leymus innovatus carries genes that affect chromosome pairing and behavior. The relatively high occurrence of spontaneous doubling in the meiocytes of these hybrids may indicate that backcrossing of the hybrids to wheat should be possible, although frequent chromosome irregularities observed in the meiocytes of the hybrids may decrease the probability of success of this step, which is essential to the process of gene transfer from L. innovatus to wheat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265309
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    A novel intergeneric hybrid in the Triticeae: Triticum aestivum x Psathyrost achys juncea (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 45-48 
    Details
    ISSN: 1432-2242
    Keywords: Russian wild rye ; Wheat ; Chromosome pairing ; Meiosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two hybrid embryos of intergeneric origin between Triticum aestivum cv Fukuho (2n=6x=42, AABBDD) and Psathyrostachys juncea (2n=2x=14, NN) were successfully rescued. One hybrid plant had the expected chromosome number of 28 (ABDN), whereas the second plant had 35 chromosomes. The average meiotic chromosome pairing in the 35-chromosome hybrid was 21.87 univalents + 6.38 bivalents + 0.11 trivalents + 0.009 quadrivalents, which indicates that two copies of the N genome were present. Chromosome pairing in the 28-chromosome hybrid was low (1.35 bivalents), and pointed out the lack of homology between the wheat genomes and the P. juncea genome. These new hybrids showed some necrosis and chlorosis, which caused severe floral abortion in the plant that had 35 chromosomes. These problems became gradually less severe after 18 months.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223785
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...