Versuche über Photoperiodismus bei südamerikanischen Kartoffelklonen

Hackbarth, J.

doi:10.1007/bf01831285

Cited by 29 publications

(3 citation statements)

References 4 publications

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“…Like this last-mentioned species it is rather susceptible to blight (BUKASOV, 1933;STELZNER and LEHMANN, 1939). Tuber formation under long-day conditions is poor (Bnxasov, 1933, p. 186), but clones are known which do produce tubers under such conditions (HACKBARTH, 1935).…”

Section: Methodsmentioning

confidence: 99%

Cytogenetic Studies in Solanum, Sect. Tuberarium

Lamm¹

2010

Hereditas

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Section: Methodsmentioning

confidence: 99%

Cytogenetic Studies in Solanum, Sect. Tuberarium

Lamm¹

2010

Hereditas

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“…It has been shown by the writer that cropping is controlled by genetic factors (Salaman, 1924), and later it was suggested that these may, in reality, be genetic factors concerned with the physiological reaction of the plant to the available daylight afforded by its environment. If that is so, and short-day reaction is, as Hackbarth (1935) has shown, a dominant, then the segregation of reactive types will occur as a result of breeding and thus afford the opportunity for the creation of long-day types from what are phenotypically short-day forms. Not only were the early introductions very tardy in their tuber formation, but the tubers when formed were small and extremely numerous, fifty or more to a root being a common experience.…”

Section: I1mentioning

confidence: 99%

The Early European Potato: its character and place of origin.

Salaman¹

1946

Journal of the Linnean Society of London, Botany

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SUMMARY From an examination of 139 varieties of the species Solatium andigenum, it has been possible to establish on the basis of leaf characters six different intergrading groups which show a transition from what is regarded as a typical 8. andigenum type, to one no less typical of the domestic European varieties commonly known under the specific name of S. tuberosum. It is suggested that there is, in fact, one, not two, species of cultivated potatoes with the chromosome formula of 2n= 48, and that one is 8. andigenum. The use of the term S. tuberosum is convenient as indicating the specialization which has overtaken varieties derived from one of the 8. andigenum group forms in Europe, and another in Chiloé and Chile. That the place of origin of the European potato is to be sought for in the northern extremity of the distribution area of 8. andigenum, and that Colombia is its most likely location. That the potato left some northern port in South America, possibly Cartagena, and that at least one importation reached Spain at the port of Seville not later than 1569.

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“…Some figures of Hackbarth (1935) for South American clones illustrate this. With 'long-day varieties' (varieties which produce the maximum yield per stool in long days) I g. of haulm (weighed air-dry) produced during the course of the growing-season an average of 2.5 g. of tubers when the days were the normal long days of the German summer, and 17.1 g. when the day was artificially reduced to 12 hr.…”

Section: The General Hypothesis and Evidence To Support Itmentioning

confidence: 87%

The Relation Between the Size of Plant and the Spread of Systemic Diseases

Plank¹

1948

Annals of Applied Biology

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It is an implication of systemic infection by the aphis-borne viruses that potato plants withlarge haulms should be specially vulnerable to infection, and this implication is supported by evidence in the field.Haulms are reduced in size by short days, low temperatures, under-nutrition and varietal differences. Certain observations are adduced to show that these factors reduce vulnerability. It is suggested that the transference of the potato from the short days, infertile soils and primitive cultivation on the Andes to the long summer days and productive farming of Europe and North America enhanced its vulnerability to aphis-borne virus diseases: the further effects of changes of temperature and manurial practices in the last century need elucidation.

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Versuche über Photoperiodismus bei südamerikanischen Kartoffelklonen

Cited by 29 publications

References 4 publications

Cytogenetic Studies in Solanum, Sect. Tuberarium

Cytogenetic Studies in Solanum, Sect. Tuberarium

The Early European Potato: its character and place of origin.

The Relation Between the Size of Plant and the Spread of Systemic Diseases

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