|Synonyms||S. fendleri var. physaloides, S. leptosepalum, S. matehualae|
|Cytoplasm Type||D (Hosaka 2014)|
||Hawkes: A revision of the tuber-bearing Solanums, 2nd ed: 123, 171. 1963.|
Solanum hjertingii (hjertingii in honor of Danish botanist Jens Peter Knudsen Hjerting) is a northern Mexican species, primarily Coahuila and Nuevo Leon. Small plants, reaching about 7 to 14 inches tall. Stolons as long as three feet. Tubers usually 1 to 2 inches in diameter, sometimes as much as 3 inches. Violet flowers.
This species is an allotetraploid, carrying clade 1 and clade 4 genomes. Hawkes (1990) expected an AABB genome configuration for this species, confirmed by Pendinen (2008), who determined that the A genome contributor was S. verrucosum and the B genome contributor was one of S. cardiophyllum, S. ehrenbergii, or S. jamesii. This species appears to be closely related to S. stoloniferum (Van den Berg 2002).
Vega (1995) found that this species is less frost tolerant than domesticated potato.
|Condition||Type||Level of Resistance||Source|
|Aphids||Invertebrate||Somewhat resistant||Radcliffe 1970|
|Early Blight||Fungus||Somewhat resistant||Jansky 2008|
|Late Blight||Fungus||Somewhat resistant||Bachmann-Pfabe 2019|
|Potato Cyst Nematode (G. pallida)||Invertebrate||Not resistant||Bachmann-Pfabe 2019|
|Potato Virus Y||Virus||Somewhat resistant||Cai 2011|
|Soft Rot / Blackleg||Bacteria||Somewhat resistant||Chung 2011, Machida-Hirano 2015|
|Tuber Blackening||Abiotic||Somewhat resistant||Machida-Hirano 2015|
I have found no account of tuber glycoalkaloids in S. hertingii. Foliar glycoalkaloids appear to consist primarily of solanine and chaconine (Gregory 1981).
Many of the tubers that I have sampled from plants of this species seemed entirely palatable. A few had a mild bitter aftertaste.
I have found seeds of this species easy to germinate using the standard conditions for S. tuberosum.
Towill (1983) found that seeds of this species stored at 1 to 3 degrees C germinated at 82% after 26 years.
Culley (2002) found that triploid progeny of diploid S. tuberosum x S. hjertingii were resistant to bruising and low in polyphenol oxidase.
Crosses with S. tuberosum
|S. hjertingii||S. tuberosum (4x)
|S. tuberosum (2x)||S. hjertingii||Yes||Yes||Yes||3x||Culley (2002)|
|S. tuberosum (4x)
||S. hjertingii||Low||None||Jackson (1999)|
Crosses with other species