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Solanum raphanifolium

Common Name(s) 
Solanum raphanifolium plant
Solanum raphanifolium plant
Coderap
SynonymsS. hawkesii
Clade4
SeriesMegistacroloba
PloidyDiploid (2x)
EBN2
Self-compatibleNo
Genome
AA
Cytoplasm TypeM (Hosaka 2009, as C)

Description

Solanum raphanifolium (raphanifolium meaning that the leaf shape is similar to Raphanus, radish) is a wild potato species from southern Peru.  This species can survive frosts down to 26 degrees F (-3.5 C) (Li 1977).  Vega (1995) found that this species is more frost tolerant than domesticated potato.

This species has very attractive, large, and abundant flowers and might have some potential as an ornamental.

Kiszonas (2010) measured the tuber pH of wild potato species and found that S. raphanifolium has the highest pH among species tested, at 6.07, tying with phureja type domesticated potatoes.  It is not known if tuber pH has any agronomic significance.

ConditionLevel of ResistanceSource
 Wart Somewhat resistant Machida-Hirano 2015
 Potato Leaf Roll Virus Somewhat resistant Machida-Hirano 2015
 Root Knot Nematode Somewhat resistant Machida-Hirano 2015
 Frost Somewhat resistant Machida-Hirano 2015
 Heat Somewhat resistant Machida-Hirano 2015
 Drought Somewhat resistant Machida-Hirano 2015
   

Glykoalkaloid content

Johns (1986b,1990) found glycoalkaloid levels ranging from 28 to 70mg/100g for five accessions of S. raphanifolium.  The primary glycoalkaloids were solanine and chaconine. The lower end of this range is close to the safety zone, so it may be possible to select edible varieties of this species.

Images

Solanum raphanifolium plant
Solanum raphanifolium plant
Solanum raphanifolium plant
Solanum raphanifolium plant
Solanum raphanifolium flower
Solanum raphanifolium flower
Solanum raphanifolium stems
Solanum raphanifolium stems
Solanum raphanifolium flowers
Solanum raphanifolium flowers
Solanum raphanifolium plant
Solanum raphanifolium plant
Solanum raphanifolium flower
Solanum raphanifolium flower
Solanum raphanifolium flowers
Solanum raphanifolium flowers
Solanum raphanifolium berries
Solanum raphanifolium berries
   

Cultivation

I have found this species slow and difficult to germinate.  It may require different conditions than the standard for S. tuberosum.

Breeding

Crosses with S. tuberosum

FemaleMaleBerry Set
Seed SetPloidyGermSource
 S. tuberosumS. raphanifoliumLowLow  Jackson (1999)
 S. raphanifoliumS. tuberosumNoneNone  Jackson (1999)
       

Crosses with other species

Jackson (1999) found 7-33% 2n pollen for varieties of this species.

FemaleMaleBerry Set
Seed SetPloidyGermSource
       

References

Solanum raphanifolium at Solanaceae Source

Solanum raphanifolium at GRIN Taxonomy