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  • 1
    Electronic Resource
    Electronic Resource
    The cytology of phytophthora infestans (1965)
    Springer
    Chromosoma 16 (1965), S. 681-692 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Phytophthora infestans has three kinds of somatic nuclei: an oval shaped nucleus (approx. 3.1×2.7 μ) which stains diffusely except for a crescent shaped Feulgen positive “cap” which stains intensely; a “granular” nucleus whose contents are organized into a fairly constant number of stained bodies, and, a deeply staining “condensed” nucleus. The “capped” nucleus is thought to be “metabolic” or “resting” and the “granular” nucleus is thought to be dividing as it is most commonly found in hyphal tips. Attenuated forms of all three kinds of nuclei are found. Nuclear division is mitotic and intranuclear. Eight—ten chromosomes are seen at metaphase. Sporangia have a mean of 6.3 nuclei which is constant for age and strain of culture. Sporangia become multinucleate as a result of nuclear migration and not by division in the developing sporangium. Zoospores are usually uninucleate. The nuclear “cap” is persistent throughout nuclear division when it also divides. It is associated with flagella production and nuclear migration and has some of the properties of a “blepharoplast”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285117
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  • 2
    Electronic Resource
    Electronic Resource
    A Polyhaploid Plant of Solanum polytrichon Rydb. (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 469-469 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Material Chromosome number, 2n = Mean terminal leaflet index S.EM. Mean stomatal length* S.EM. Habit S. polytrichon C.P.C. 2330.1 48 48 48 48 82-0 1-57 82-7 1-39 90 0l-49 87-3 2-53 23-7 0-32 20-9 0-47 21-3 0-37 22-5 0-42 Normal Segregates of 5. polytriehon C.P.C. 2330.1 1 2 3 4 5 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/175469a0
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  • 3
    Electronic Resource
    Electronic Resource
    Double Chromosome Reduction in a Tetraploid Solanum (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 359-361 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EPEATED attempts to cross Solanum demissum n = 6x = 12) with S. stoloniferum (2n = 4# = 48) gave one seeded berry containing one seed. This yielded a plant (M.211) which had 2n = 4x = 48, instead of the expected 2n = 5x=6Q. The cytological, morphological and biochemical studies of M.211 reported ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208359a0
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  • 4
    Electronic Resource
    Electronic Resource
    The consequences of an unusual Robertsonian translocation in celery (Apium graveolens var dulce) (1978)
    Springer
    Chromosoma 69 (1978), S. 211-218 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A Robertsonian translocation found in a cultivar of celery is described which is unusual because half the small product of the exchange survives as a telocentric chromosome. The change has no drastic effect on the overall fitness of the translocation homozygote. The consequences of such a change for karyotype evolution are shown to be, karyotype asymmetry, the possible genesis of B-chromosomes and the possibility of a chromosome change becoming established even though it has no adaptive value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329919
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  • 5
    Electronic Resource
    Electronic Resource
    Giemsa banding: karyotype differences in some species of Anemone and in Hepatica nobilis (1974)
    Springer
    Chromosoma 44 (1974), S. 405-416 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Banding patterns were revealed in the karyotypes of six species of Anemone and in Hepatica nobilis using a Giemsa staining technique. — There was considerable inter-specific variation both regarding the amount and distribution of bands. Small but significant intra-specific differences in banding patterns were also found. The results are discussed both as they relate to the use of Giemsa banding in karyotype analysis and to understanding the nature of the banding phenomenon itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284900
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  • 6
    Electronic Resource
    Electronic Resource
    Giemsa banding of meiotic chromosomes (1974)
    Springer
    Chromosoma 49 (1974), S. 113-119 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Applying a Giemsa staining technique to the meiotic chromosomes of Anemone blanda demonstrates that Giemsa bands similar to those seen in the mitotic chromosomes are discernible at all the principal stages of meiosis. The bands are not a product of the Giemsa procedure since they can be seen in unstained preparations using phase-contrast optics as chromocentres in interphase nuclei and as condensed regions in prophase chromosomes. That the bands seem to be permanent features of the nucleus, whether it is dividing or otherwise is an important consideration for understanding their nature and function. Bands and chiasmata do not coincide indicating on the one hand that chiasmata are not responsible for differences in banding patterns and on the other hand that the conservation of bands is an indication that they are either inert regions or specialised regions with considerable adaptive significance. These alternatives can only be resolved by genetical studies of the banding phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348884
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  • 7
    Electronic Resource
    Electronic Resource
    The nature of centromeric dots in Nigella chromosomes (1977)
    Springer
    Chromosoma 62 (1977), S. 369-373 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Derived telocentric chromosomes in Nigella doerfleri have pairs of Giemsa staining dots at their terminal centromeres which appear in size and behaviour to be identical with the centromeric dots of their submetacentric homologue. The telocentric chromosomes are stable and therefore their centromeres are functional and probably complete. That the centromeres also possess centromeric dots indicates that the dots represent essential components of the centromere, a conclusion which supports the contention that they are kinetochores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327035
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  • 8
    Electronic Resource
    Electronic Resource
    The cytology of oxalis dispar (brown) (1956)
    Springer
    Chromosoma 8 (1956), S. 650-670 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The chromosome complement ofOxalis dispar 2n = 12 consists of a pair of submedian (SM) chromosomes, three subterminal (ST) and seven telocentric (TE) chromosomes. At mitosis and meiosis the TE chromosomes are as efficient and stable as the other chromosomes of the complement. Chromosome breakage at the centromere in the metacentric chromosomes may give rise to new TE chromosomes. It is suggested that all the TE chromosomes may have arisen from metacentric chromosomes in this way. They may have been favoured because of the deleterious nature of the discarded chromosome arms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259525
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  • 9
    Electronic Resource
    Electronic Resource
    The enigma of triploid potatoes (1966)
    Springer
    Euphytica 15 (1966), S. 285-290 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Triploids are comparatively difficult to produce in tuberous Solanums as is the case in many other genera. Amongst the wild species triploids are infrequent whereas in the cultivars the opposite is true. It is argued that their survival and increase under cultivation means that they possess certain selective advantages as cultivars, advantages often concomitant with triploidy per se. Triploids make superior cultivars in a number of crops: by analogy therefore, it is suggested that the relative merits of triploid cultivated potatoes warrants investigation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022170
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  • 10
    Electronic Resource
    Electronic Resource
    Chromosome numbers in potato cultivars hypersensitive to late blight (1960)
    Springer
    Euphytica 9 (1960), S. 254-257 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The chromosomes of twenty-four blight resistant potato cultivars produced from S. demissum x S. tuberosum hybrids were counted. Twenty-two cultivars had 2n=4x=48 chromosomes and two cultivars had 2n=4x+1=49 chromosomes. The implications of these results are discussed briefly in relation to previous studies and to potato breeding methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022231
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