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  • 1
    Electronic Resource
    Electronic Resource
    Immunological Methods in Plant Taxonomy (1956)
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 573-573 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Thin slices of tuber of each species were soaked in sodium hydrosulphite (0-7 per cent solution) for 30 min., rinsed in distilled water and the sap expressed by crushing the slices, supported within folded strips of moist calico, through stainless steel rollers. Antisera were raised in rabbits to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/177573a0
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  • 2
    Electronic Resource
    Electronic Resource
    Continental Drift: Continental Drift and the Age of Angiosperm Genera (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 48-50 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE decades of dispute and indecision over the hypothesis of continental drift seem to be drawing to a close. Modern techniques such as rock magnetism measurement, investigations of ancient climates and palaeowinds, and also the computer investigations of continental outlines reported by Sir Edward ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207048a0
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  • 3
    Electronic Resource
    Electronic Resource
    The Importance of the Bolivian Wild Potato Species in Breeding for Globodera pallida Resistance (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 101 (1988), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Screening for resistance to the potato cyst nematode, Globodera pallida, in potatoes from. Bolivia, was carried out in 1983 and 1984, using a mixture of four nematode populations representing pathotypes Pa1, Pa2 and Pa3 From the 66 accessions of 17 species and subspecies evaluated, highly resistant genotypes were identified in 21 accessions from seven species. All had Pf/Pi values of 2 or less, whereas the susceptible control, Solanum tuberosum cv. ‘Disiree’ had Pf/Pi values of more than 2G in both tests. Two diploid wild species, S. brevicaule and S. leptophyes, showed the best resistant. The geographical distributional of resistant populations and the evolution of resistance in wild potato populations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1988.tb00298.x
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  • 4
    Electronic Resource
    Electronic Resource
    Salaman's Culture of Blight Resistant ‘Aya papa’ (1941)
    [s.l.] : Nature Publishing Group
    Nature 148 (1941), S. 25-25 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A FURTHER note may be of interest in connexion with Reddick's paper, “Whence came Phytophthora infestans ?”1, on the question of the distribution of blight resistant potatoes in the American continent. Blight resistance has so far been found only in Mexico with the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/148025b0
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  • 5
    Electronic Resource
    Electronic Resource
    Origin of the First European Potatoes and their Reaction to Length of Day (1946)
    [s.l.] : Nature Publishing Group
    Nature 158 (1946), S. 168-169 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE point at issue between Dr. van der Plank and ourselves seems to be whether the Andean short-day potatoes were or were not at a disadvantage when brought to Europe in the late sixteenth century. We have stated that we consider they were at some disadvantage1, at any rate in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/158168b0
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  • 6
    Electronic Resource
    Electronic Resource
    Origin of the First European Potatoes and their Reaction to Length of Day (1946)
    [s.l.] : Nature Publishing Group
    Nature 157 (1946), S. 591-591 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WE are interested to see that Dr. van der Plank1 has provided additional evidence for the view that the first European potatoes were short-day types from the Andes of South America rather than long-day adapted potatoes from Chile as the Russians have asserted. We have ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/157591a0
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  • 7
    Electronic Resource
    Electronic Resource
    Potato ‘Bolters’: an Explanation Based on Photoperiodism (1946)
    [s.l.] : Nature Publishing Group
    Nature 157 (1946), S. 375-376 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ATTEMPTS to solve the problem of the ‘bolter’ condition in domestic potato varieties have appeared from time to time in these columns. Thomas1, for example, demonstrated that bolters differ from normal plants by the presence of a small supernumerary chromosome, though Carson and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/157375c0
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  • 8
    Electronic Resource
    Electronic Resource
    Origin of the First European Potatoes and their Reaction to Length of Day (1946)
    [s.l.] : Nature Publishing Group
    Nature 158 (1946), S. 713-713 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR. VAN DER PLANK'S experiments at Pretoria afford additional evidence for the view, which, incidentally, we have never disputed, that certain Andean potatoes yield better than others, even under short day, and that only the best of them will yield, even under those conditions, as well as the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/158713a0
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  • 9
    Electronic Resource
    Electronic Resource
    Taxonomic and evolutionary implications of the Endosperm Balance Number hypothesis in potatoes (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 180-185 
    Details
    ISSN: 1432-2242
    Keywords: Potato ; Solanum ; Endosperm Balance Number (EBN) ; Taxonomy ; Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The Endosperm Balance Number (EBN) hypothesis can explain to a considerable degree the crossability between tuber-bearing Solanum species. It has been shown to be genetically controlled and is dosage dependent. There is a good correlation between EBN and the postulated evolution and present taxonomy of potatoes. The primitive white stellate-flowered species from Mexico are 1EBN, and this condition is also found in species from South America with flowers of the same colour and shape. The evolution of a rotate corolla seems to be correlated with 2EBN. It is postulated that the 2EBN state arose as a reproductive isolating mechanism in South America. The taxonomic and evolutionary implications of the EBN hypothesis are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223998
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  • 10
    Electronic Resource
    Electronic Resource
    Crossability relationships of andean potato varieties of three ploidy levels (1978)
    Springer
    Euphytica 27 (1978), S. 541-551 
    Details
    ISSN: 1573-5060
    Keywords: Solanum tuberosum ; potato ; ploidy ; gene-flow ; ‘triploid block’ ; crossability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The formation of triploids in 4x×2x crosses was studied in primitive potato varieties from the Andes of Peru and Bolivia. Triploid frequencies were as high as 80–100% in some crosses, although the actual number of seeds was low. The ‘triploid block’ varied according to the tetraploid parent, and was never entirely absent. The likelihood of triploid formation was studied in 4x×2x crosses where pollen from both tetraploids and diploids of known genotype was used. Even though the diploids were chosen for their non-production of 2n gametes, as detected in pollen grain size, 66% of the hybrids were tetraploid. The amount and probability of gene-flow between the tetraploid and diploid gene-pools, either directly through 2n gametes or through ‘triploid bridges’ was examined. Most of the 20 cultivars of S. x chaucha produced seed in crosses with tetraploids and diploids, although the fertility of the latter crosses was four times higher. The female fertility of some of the triploids thus allows them to exchange genes with the tetraploids and diploids, although gene-flow occurs more rapidly through direct transfer from diploids to tetraploids via 2n gametes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043180
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