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Solanum raphanifolium

Common Name(s)  
Solanum raphanifolium plant
Solanum raphanifolium plant
Code rap
Synonyms S. hawkesii
Clade 4
Series Megistacroloba
Ploidy Diploid (2x)
EBN 2
Self-compatible No
Genome
AA
Cytoplasm Type M (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.

Condition Level of Resistance Source
 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

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