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  • 1
    Electronic Resource
    Electronic Resource
    Storage of sugarbeet pollen (1986)
    Springer
    Euphytica 35 (1986), S. 777-783 
    Details
    ISSN: 1573-5060
    Keywords: Beta vulgaris ; sugarbeet ; pollen ; cryopreservation ; pollen storage ; liquid nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To develop the technology for long-term pollen preservation, sugarbeet pollen was collected from plants grown in the greenhouse and in the field, and was stored 1 day to 1 year at 5, -18, and -196°C. Pollen containing about 12% moisture was successfully stored in liquid nitrogen (LN2) up to 1 year; this pollen effected fertilization of male-sterile flowers as well as freshly collected pollen. Germination of the resultant seed was good and not different from seed from fresh pollinations. Pollen stored at -18°C for 1 year did not result in as much seed set as fresh pollen, and 1 year at 5°C was essentially lethal. In vitro pollen germination served as a post-storage viability measure, provided the pollen was hydrated before germination. The methods tested in these experiments provided a relatively simple, reliable, and inexpensive means for preservation of sugarbeet pollen for breeding purposes and for preservation of genetic resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028585
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Inbreeding depression in diploid and autotetraploid sugarbeet, Beta vulgaris L. (1972)
    Springer
    Euphytica 21 (1972), S. 106-111 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of inbreeding on vegetative vigor, as measured by root yield, was evaluated in two diploid (2x) and equivalent autotetraploid (4x) sugarbeet strains, and one additional 2x and one 4x strain. Root yields of the 2x and 4x S1 progenies each averaged 86.7% of their comparable open-pollinated progeny. Inbreeding depression of root yield was variable from strain to strain. The selfed 4x populations, when compared with their 2x equivalents, suffered more yield depression than was expected on the basis of the theoretic approach to homozygosity associated with selfing in autotetraploids. The inbreeding depression was partly attributed to (a) the approach to homozygosity, and (b) the fact that partially homozygous 4x S1 individuals were probably unable to make compensating growth when located adjacent to a low vigor aneuploid plant. A major part of root yield depression remained unexplained. Sucrose content within strains and within ploidy levels was not significantly affected by one generation of selfing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040554
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  • 3
    Electronic Resource
    Electronic Resource
    Depth profiling in surface regions of oxidized metal alloys by low energy PIXE (1987)
    Springer
    Microchimica acta 91 (1987), S. 85-91 
    Details
    ISSN: 1436-5073
    Keywords: depth profiling ; low energy PIXE ; metal oxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract As a nondestructive technique for depth profiling of elements the PIXE-method was applied to determine the concentration profile of elements in the near surface of oxidized metal alloys. The outer region of about 1 μm was investigated using low energy protons for X-ray excitation. A set of X-ray yield measurements was carried out at proton energies of 150 to 300 keV. The unfolding of the X-ray yields was performed by calculation of proton energy loss, X-ray production cross section and X-ray attenuation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01199481
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  • 4
    Electronic Resource
    Electronic Resource
    Polyploid and maternal effects on Rhizoctonia root rot resistance in sugarbeet (1976)
    Springer
    Euphytica 25 (1976), S. 419-423 
    Details
    ISSN: 1573-5060
    Keywords: Beta vulgaris ; sugarbeet ; Rhizoctonia solani ; disease resistance ; plant breeding ; hybrid sugarbeet ; triploid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Three sugarbeet breeding lines partially resistant to the root-rotting fungus, Rhizoctonia solani, were converted to the tetraploid condition without selection. These three diploid and tetraploid lines were crossed with three diploid male-sterile lines to produce equivalent diploid and triploid hybrids. The triploid hybrids were significantly more resistant to Rhizoctonia than were the diploid hybrids. However, the tetraploid resistant limes were no different than their diploid equivalent lines. Reciprocal crosses provided no evidence of maternal effect on resistance. Cytoplasm that included the male-sterility factor had no influence on resistance. Triploid hybrids, where the resistant parent is tetraploid, should be advantageous in the breeding of rhizoctonia-resistant hybrid varieties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041575
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  • 5
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    Depth profiling in surface regions of oxidized metal alloys by low energy PIXE (1987)
    Springer
    Details
    Publication Date: 1987-01-01
    Print ISSN: 0026-3672
    Electronic ISSN: 1436-5073
    Topics: Chemistry and Pharmacology
    Published by Springer
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