This page is a draft, part of our ongoing wild potato project. I’ll probably be adding information to the species pages through 2020 at least, but I’m making them public since they may be useful even incomplete.

Solanum albicans

Common Name(s): Aya papa, Pishgo papa

Synonyms: S. acaule subsp. albicans, S. acaule subsp. palmirense, S. acaule var. albicans

Series: Acaulia

EBN: 4

Ploidy: Hexaploid

Segregation: Disomic

Self-compatible: Yes

Cytoplasm Type: Unknown

Description

This hybrid species is related and very similar to Solanum acauleOchoa (2004) believes it to be a cross of S. acaule x S. sogarandinum.  It takes the form of a low-growing rosette, but is a little bit larger than S. acaule.  Stolons run about 10 to 15 inches in length and often act as runners, being very shallow and forming new plants at nodes.  Tubers are mostly round and 1/2 to 1 inch in diameter.  Flowers are mostly white to light blue, occasionally darker.  Fruits are round.

The natural range of S. albicans extends from Ecuador to central Peru at elevations from about 9,840 to 15,600 feet (3000 to 4750 m).

S. albicans, a South American species, is morphologically very similar to S. demissum, a hexaploid North American species.  This is surprising, because the North and South Americans species have been long isolated from each other and have diverged significantly.  Possible explanations include a common ancestor, more extensive prior distribution, or convergent evolution (Spooner 1995).

Hijmans (2003) found that at least some accessions of this species were frost resistant down to 23 degrees F (-5 C).

Condition Level of Resistance Source
     

Glykoalkaloid content

I have found no available reference on TGA content in S. albicans.  The levels are probably similar to S. acaule.

Cultivation

Breeding

Crosses with S. tuberosum

Ochoa (2004) reported that the cross of S. albicans x diploid S. tuberosum (as S. phureja) produced self-compatible progeny.

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. albicans Minimal Minimal     Jackson (1999)
S. albicans S. tuberosum Moderate Moderate     Jackson (1999)
S. albicans 2x S. tuberosum High High     Ochoa (2004)

Crosses with other species

Jackson (1999) found 5-27% 2n pollen for varieties of this species.

Female Male Berry Set Seed Set Germination Ploidy Source
S. albicans S. lignicaule Low Low     Ochoa (2004)
S. albicans S. immite High Low     Ochoa (2004)
S. albicans S. wittmackii High Low     Ochoa (2004)
S. albicans S. chomatophilum High Low     Ochoa (2004)
S. chomatophilum S. albicans High Low     Ochoa (2004)
S. albicans S. violcaeimarmoratum (as S. urubambae) High None     Ochoa (2004)
S. albicans S. boliviense (as S. megistacrolobum) Moderate None     Ochoa (2004) 
S. boliviense (as S. megistacrolobum) S. albicans High Low     Ochoa (2004)
S. albicans S. raphanifolium Moderate Low     Ochoa (2004)
S. raphanifolium S. albicans High Low     Ochoa (2004)
S. albicans S. sogarandinum High Low     Ochoa (2004)
S. albicans S. chiquidenum Low None     Ochoa (2004)
S. albicans S. paucissectum Low None     Ochoa (2004)
S. albicans S. candolleanum (as S. bukasovii) High Low     Ochoa (2004)
S. albicans S. rhomboideilanceolatum (as S. ancophilum) Low Moderate     Ochoa (2004)
S. rhomboideilanceolatum (as S. ancophilum) S. albicans Low None     Ochoa (2004)
S. candolleanum (as S. bukasovii) S. albicans High Moderate     Ochoa (2004)
S. albicans S. brevicaule (as S. leptophyes) High None     Ochoa (2004)
S. albicans S. medians (as S. arahuayum) High None     Ochoa (2004)
S. albicans S. acaule High Low     Ochoa (2004)
S. acaule S. albicans High Low     Ochoa (2004)
S. albicans S. colombianum (as S. nemorosum) None None     Ochoa (2004)
S. colombianum (as S. nemorosum) S. albicans None None     Ochoa (2004)

 

 

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