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  • Articles  (3)
  • Articles: DFG German National Licenses  (3)
  • Barley  (2)
  • Key words Pollen  (1)
  • Chemistry
  • Springer  (3)
  • 1995-1999  (1)
  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Effects of pollen competitive environment on pollen performance in Mirabilis jalapa (Nyctaginaceae) (1997)
    Springer
    Sexual plant reproduction 10 (1997), S. 101-106 
    Details
    ISSN: 1432-2145
    Keywords: Key words Pollen ; Pollen competition ; Pollen performance ; Microgametophyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  We examined the influence of pollen competitive environment on pollen performance in Mirabilis jalapa. We used the number of pollen grains and the number of pollen tubes per pistil as measures of pollen competition. Pollen germination, pollen tube penetration into the style, and pollen tube growth rates were used as measures of pollen performance. All three measures of pollen performance were affected by the competitive environment. Pollen germination was greatest at intermediate pollen load sizes. The percentage of germinated pollen grains that penetrated the stigma and grew into the style decreased with pollen load size. Pollen tube growth rate in the style was greater and more variable with larger numbers of pollen tubes in the style. Controlling for the degree of selection at the stigma indicated that pollen-pollen or pollen-style interactions were the likely causes of increased growth rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004970050074
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Genetical and RFLP studies at the Mla locus conferring powdery mildew resistance in barley (1993)
    Springer
    Theoretical and applied genetics 85 (1993), S. 713-718 
    Details
    ISSN: 1432-2242
    Keywords: Barley ; Multigene family ; Mla locus ; Recombination ; RFLP marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The complex structure of the multigene family at the Mla locus conferring powdery mildew resistance in barley was studied by making diallel crosses between several near-isogenic lines carrying different Mla alleles. The mode of inheritance of the Mla alleles investigated was determined to be dominant for Mla1, Mla6, Mla7 and Mla13 and semidominant for Mla3, Mla12 and Mla20. F1 plants were backcrossed to the susceptible recurrent parent in order to identify susceptible and double-resistant recombinants in the BC1F1 generation. Out of 17605 progenies tested in the BC1F1 generation, two susceptible recombinants, one between Mla1 and Mla12 and one between Mla13 and Mla20 were confirmed. The former was also verified by RFLP analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225010
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    RFLP markers to identify the alleles on the Mla locus conferring powdery mildew resistance in barley (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 330-338 
    Details
    ISSN: 1432-2242
    Keywords: RFLP marker ; Barley ; Powdery mildew ; Mla locus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary To identify the mildew resistance locus Mla in barley with molecular markers, closely linked genomic RFLP clones were selected with the help of near-isogenic lines having the ‘Pallas’ and ‘Siri’ background. Out of 22 polymorphic clones 3 were located around the Mla locus on chromosome 5 with a distance of 5.1 + 2.9 cM (MWG 1H068), 4.2±1.7 cM (MWG 1H060) and 0.7 ± 0.7 cM (MWG 1H036), respectively. The polymorphic clone MWG 1H036 displayed the same RFLP pattern in both ‘Pallas’ and ‘Siri’ near-isogenic lines and in different varieties digested with six restriction enzymes possessing the same mildew resistance gene. The alleles of the Mla locus were grouped in 11 classes according to their specific RFLP patterns; 3 of these groups contain the majority of Mla alleles already used in barley breeding programs in Europe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229491
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    Paper (German National Licenses)
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