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Solanum x doddsii

Common Name(s)  
Tubers of the wild potato species Solanum x doddsii
Solanum x doddsii tubers
Code dds
Synonyms  
Clade 4
Series Tuberosa
Ploidy Diploid (2x)
EBN 2
Tuberization Photoperiod
Short day
Self-compatible No
Genome
AA
Cytoplasm Type  
Citation
Correll: Wrightia 2: 186. 1961.

Description

Solanum x doddsii distribution map
Solanum x doddsii distribution map

Solanum x doddsii (doddsii, in honor of potato researcher Kenneth S. Dodds) is a hybrid species native to dry valleys in the Bolivian Andes.  Plants reach about two feet tall.  Tubers are round, reaching about an inch in diameter.  Flowers light purple.  Berries small, round, and reported to be light green, although those that I have seen have been almost white.  Thought to be a natural hybrid of S. chacoense x S. brevicaule, or perhaps the reverse.  Spooner (2018) showed that, in a DNA marker analysis, different accessions of this species grouped closely with either S. berthaultii or S. brevicaule, which may indicate misidentification or that this species is more complex that previously thought.  The data appears to suggest that there may be hybrids of both S. chacoense and S. brevicaule and S. berthaultii and S. brevicaule among accessions identified as S. x doddsii

Unfortunately, Hawkes (1989) notes that the habitat in which this the original collections were made has been destroyed and plants were absent, indicating that it may have been extirpated in the wild.

This species has been tentatively classified as vulnerable on the IUCN Red List (Cadima 2014).

Resistances

Vega (1995) found that this species is less frost tolerant than domesticated potato.

Condition Type Level of Resistance Source
Golden nematode (G. rostochiensis) Invertebrate Somewhat resistant Castelli 2003
Late Blight Fungus Not resistant Bachmann-Pfabe 2019
Potato Cyst Nematode (G. pallida) Invertebrate Somewhat resistant Castelli 2003

Glykoalkaloid content

No information.

Images

Solanum x doddsii plant
Solanum x doddsii plant
Solanum x doddsii plant
Solanum x doddsii plant
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Solanum x doddsii flower
Berry of the wild potato species Solanum x doddsii
Solanum x doddsii berry
Berries of the wild potato species Solanum x doddsii
Solanum x doddsii berries
Tubers of the wild potato species Solanum x doddsii
Solanum x doddsii tubers
     

Cultivation

I have found seeds of this species easy to germinate using the standard conditions for S. tuberosum.

In my experience, this species does not fruit easily.  Most flowers drop, even when hand pollinated.

Breeding

Crosses with S. tuberosum

Female Male Berry Set
Seed Set Germ Ploidy Source
S. x doddsii S. tuberosum None None     Jackson (1999)
S. tuberosum S. x doddsii Low Minimal     Jackson (1999)

Crosses with other species

Jackson (1999) found 0-11% 2n pollen for varieties of this species.

Female Male Berry Set
Seed Set Germ Ploidy Source
             

References

Solanum x doddsii at Solanaceae Source

Solanum x doddsii at GRIN Taxonomy

Solanum x doddsii at CIP

 

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