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Solanum acroglossum

Common Name(s) Papa de Amaa, Auqui Papa
Tubers of the wild potato species Solanum acroglossum
Solanum acroglossum tubers
Code acg
Synonyms  
Clade 3
Series Piurana
Ploidy Diploid (2x)
EBN 2
Tuberization Photoperiod
Short day
Self-compatible No
Genome
PP
Cytoplasm Type W (Hosaka 2009)
Citation
Juzepczuk: Izv. Akad. Nauk SSSR, Ser. Biol. 2: 313. 1937.

Description

Solanum acroglossum distribution map
Solanum acroglossum distribution map

Solanum acroglossum (acroglossum means something like top-tongued and probably refers to the leaflet arrangement) is a wild potato species from Peru.  Plants are generally a bit smaller than domesticated diploids, with sparser foliage.  Tubers are very unusual, with alternating swellings and restrictions, like beads on a string (the technical term is moniliform).  Flowers light blue.  It is found at elevations from about 8,200 to 12,100 feet (2500 to 3700 meters) (Ochoa 2004).

 

Resistances

This species can survive frosts down to 25 degrees F (-4 C) (Li 1977).  Vega (1995) found that this species is less frost tolerant than domesticated potato.

This species appears to produce unique compounds that confer resistance to the Colorado potato beetle.  S. acroglossum lacks the trichomes that are often associated with CPB resistance and also lacks high concentrations of glycoalkaloids, but contains hydroxycoumarines, a class of compounds that includes at least one isomer for which anti-larval activity has been noted (Tai 2014).

Condition Type Level of Resistance Source
Colorado Potato Beetle Invertebrate Resistant Pelletier 2007
Late Blight Fungus Somewhat Resistant Ochoa 2004

Glykoalkaloid content

A spectrographic analysis of this species showed very low levels of solanine, chaconine, and a selection of lesser glycoalkaloids, including tomatines and demissines (Tai 2014).

Images

Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum flower
Solanum acroglossum flower
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum plant
Solanum acroglossum flowers
Solanum acroglossum flowers
Solanum acroglossum plant
Solanum acroglossum plant
Flower of the wild potato species Solanum acroglossum
Solanum acroglossum flower
Tubers of the wild potato species Solanum acroglossum
Solanum acroglossum tubers
   

Cultivation

I have found Solanum acroglossum easy to germinate using the standard conditions for S. tuberosum.

Breeding

Crosses with S. tuberosum

Watanabe (1991) found that 3.6% (which was only 1 plant) of varieties of this species produced 2n pollen, which would be effectively tetraploid and 4EBN.

Female Male Berry Set
Seed Set Germ Ploidy Source
S. tuberosum S. acroglossum None None     Jackson (1999)
             

Crosses with other species

Jackson (1999) found 1% 2n pollen in varieties of this species.  Watanabe (1991) found that 1 of 28 plants tested (3.6%) produced 2n pollen.

Female Male Berry Set
Seed Set Germ Ploidy Source
S. acroglossum S. candolleanum (as S. ambosinum) Low High     Ochoa (2004)
S. acroglossum S. chiquidenum Low Moderate     Ochoa (2004)
S. acroglossum S. chomatophilum Moderate Low     Ochoa (2004)
S. candolleanum (as S. ambosinum) S. acroglossum None None     Ochoa (2004)
S. chiquidenum S. acroglossum Moderate None     Ochoa (2004)

References

Solanum acroglossum at Solanaceae Source

Solanum acroglossum at GRIN Taxonomy

Solanum acroglossum at CIP

Solanum acroglossum at Plants of the World Online

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