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 stoloniferum

Common Name(s):

Synonyms: S. ajuscoense, S. antopoviczii, S. boreale, S. candelarianum, S. fendleri, S. longipedicellatum, S. malinchense, S. neoantopoviczii, S. papita, S. polytrichon, S. tlaxcalense, S. tuberosum var. boreale, S. wightianum

Series: Longipedicellata

EBN: 2

Ploidy: Tetraploid

Segregation: Disomic

Self-compatible: Yes

Cytoplasm Type: D, W (Hosaka 2014)

Description

A widespread and highly variable species, ranging in height from about 7 to 24 inches, ranging from the southwest US to southern Mexico.  In the United States, it is found primarily in New Mexico and Arizona and reaches slightly into southwest Texas (Spooner 2004).

This species can survive frosts down to 27 degrees F (-3 C) (Li 1977).

Although S. stoloniferum is tetraploid, it has disomic chromosome segregation, which probably explains why it is self-compatible.

Some accessions of this species appear to be edible and there was at least one farm that was growing S. cardiophyllum, S. ehrenbergii, and S. stoloniferum for market in Jalisco as recently as 2010 (Villa Vazquez 2010).  Sotelo (1998) studied the nutrition of S. stoloniferum and found that it has a protein content about half to two-thirds that of the domesticated potato and vitamin C levels ranging from 2.93mg / 100g to 5.87 mg / 100g (as S. polytrichon).

This species is an allotetraploid, with two constituent genomes.  Pendinen (2008) determined that the two genomes are derived from S. verrucosum and S. cardiophyllym, S. ehrenbergii, or S. jamesii.

Condition Level of Resistance Source
 Green Peach Aphid Resistant  Alvarez (2013) Le Roux (2007)
 Late Blight  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)
 Potato Leaf Roll Virus  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)
 Colorado Potato Beetle  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)
 Root Knot Nematode  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)
 Heat  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)
 Drought  Somewhat resistant  Machida-Hirano 2015 (as S. fendleri)

Glykoalkaloid content

Johns (1990) found glycoalkaloid levels of 64 and 69mg/100g for two accessions of this species (as S. fendleri). The primary glycoalkaloids were solanine and chaconine.  Sotelo (1998) found TGA levels of 197mg/100g and 325mg/100g (as S. polytrichon).  Despite these high levels, there are reports of S. stoloniferum being grown as an edible in Mexico.  Most likely, there are either varieties with lower TGA levels or some sort of processing is done to lower glycoalkaloid content.

Cultivation

Bamberg (2018) found that alternating temperatures increased germination in this species.

Breeding

Crosses with S. tuberosum

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. stoloniferum (as S. fendleri and S. stoloniferum) Low None     Jackson (1999)
S. tuberosum S. stoloniferum (as S. papita) Low High     Jackson (1999)
S. stoloniferum (as S. fendleri and S. stoloniferum) S. tuberosum Low Low     Jackson (1999)

Crosses with other species

Watanabe (1991) found that 8.7% of varieties of this species produced 2n pollen (calculated from the totals for S. stoloniferum, S. fendleri, S. papita, and S. polytrichon, which have been reclassified as S. stoloniferum) which would be effectively octaploid and 4EBN. Jackson (1999) found 0-29%.

Female Male Berry Set Seed Set Germination Ploidy Source
S. stoloniferum 4x 2EBN S. cardiophyllum None None     Hayes (2005)
S. stoloniferum 4x 2EBN S. pinnatisectum None None     Hayes (2005)
4x 2EBN S. pinnatisectum S. stoloniferum None None     Hayes (2005)

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