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Solanum raphanifolium

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.

Condition Type Level of Resistance Source
Alternaria solani (Early Blight) Fungus Somewhat resistant Jansky 2008
Drought Abiotic Somewhat resistant Machida-Hirano 2015
Frost Abiotic Somewhat resistant Machida-Hirano 2015
Globodera pallida (Pale Cyst Nematode) Invertebrate Not resistant Castelli 2003
Globodera pallida (Pale Cyst Nematode) Invertebrate Not resistant Bachmann-Pfabe 2019
Globodera rostochiensis (Potato Cyst/Golden Nematode) Invertebrate Somewhat resistant Castelli 2003
Heat Abiotic Somewhat resistant Machida-Hirano 2015
Meloidogyne incognita (Root Knot Nematode) Invertebrate Resistant Nirula 1967
Meloidogyne spp. (Root Knot Nematode) Invertebrate Somewhat resistant Machida-Hirano 2015
Pectobacterium carotovorum (Blackleg/Soft Rot) Bacteria Somewhat resistant Chung 2011
Phytophthora infestans (Late Blight) Fungus Resistant Gonzales 2002
Phytophthora infestans (Late Blight) Fungus Somewhat resistant Bachmann-Pfabe 2019
Potato Leaf Roll Virus (PLRV) Virus Somewhat resistant Machida-Hirano 2015
Potato Virus Y (PVY) Virus Not resistant Cai 2011
Synchytrium endobioticum (Wart) Fungus 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
Tubers of the wild potato species Solanum raphanifolium
Solanum raphanifolium tubers
   

Cultivation

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

Towill (1983) found that seeds of this species stored at 1 to 3 degrees C germinated at 90 to 100% after 16 years.

Breeding

Crosses with S. tuberosum

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

Crosses with other species

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

Female Male Berry Set
Seed Set Ploidy Germ Source
             

References

Solanum raphanifolium at Solanaceae Source

Solanum raphanifolium at GRIN Taxonomy

Solanum raphanifolium at CIP