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Solanum bulbocastanum

Common Name(s)  
Code blb
Synonyms S. symphisicaulis
Clade 1
Series Bulbocastana
Ploidy Diploid (2x), Triploid (3x)
Self-compatible No
Cytoplasm Type W (Hosaka 2014)


Solanum bulbocastanum distribution Map note

Solanum bulbocastanum (bulbocastanum presumably means something like “chestnut tuber”) is a widespread species ranging from northern Mexico south to Guatemala and Honduras, growing under both dryland and woodland conditions.  Plants reach about three feet tall.  Simple leaves.  Flowers white to light yellow.  Round berries.

This species can survive frosts down to 27 degrees F (-3 C) (Li 1977).  Vega (1995) found that this species is less frost tolerant than domesticated potato.  It has the greatest resistance to potato virus Y among wild potatoes (Chung 2011).

Condition Level of Resistance Source
Early Blight Resistant Prasad 1980
Late Blight Resistant Machida-Hirano 2015
Wart Somewhat resistant Machida-Hirano 2015
Bacterial Wilt Somewhat resistant Machida-Hirano 2015
Soft Rot / Blackleg Somewhat resistant Machida-Hirano 2015
Aphids Resistant Machida-Hirano 2015
Potato Cyst Nematode Somewhat resistant Machida-Hirano 2015
Root Knot Nematode Somewhat resistant Machida-Hirano 2015
Heat Somewhat resistant Machida-Hirano 2015
Drought Somewhat resistant Machida-Hirano 2015
Potato Virus Y Somewhat resistant Chung 2011

Glykoalkaloid content




I have found seeds of this species easy to germinate using the standard conditions for S. tuberosum.

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


Crosses with S. tuberosum

Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S.bulbocastanum None None     Jackson (1999)
S. bulbocastanum S. tuberosum None None     Jackson (1999)

Crosses with other species

Watanabe (1991) found that 5.9% of varieties of this species produced 2n pollen and Jackson (1999) found 2-4%, which would be effectively tetraploid and 2EBN.  S. bulbocastanum x S. cardiophyllum hybrids produced 2n pollen in 9.1% of plants.

Female Male Berry Set Seed Set Germination Ploidy Source



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