Chromosome Counts of Jaltomata species
revised 13 Feb 2014  

Link to Jaltomata homepage

The information on this page may be cited as a communication with professor
Thomas Mione, Central Connecticut State University,
Biology Department, Copernicus Hall, 1615 Stanley Street, New Britain, CT 06050
Link to description of the genus Jaltomata
Literature Cited

 

Chromosome counts of Jaltomata species
species count
n
count
2n
source country comments
J. chihuahuensis
n = 12
  Mione & Bye 1996 Mexico Meiocytes were stained by crushing immature anthers with a fine dissecting needle in a drop of filtered acetic carmine. Davis 1180 was grown/used.
 
       
J. darcyana
2n = 24 Mione & Yacher 2005 Costa Rica two counts of 23 to 24, and one count of 24, Mione & Yacher 694
 
       
J. herrerae
n = 12
  Roe, 1967 Peru The specimen Iltis et al. 972 was used for the count, and T. M. independently identified this specimen as J. herrerae
 
       
J. lojae
n = 12
  Mione & Serazo 1999 Ecuador 9 observations / counts, Mione 560
 
       
J. procumbens
n = 12
  Davis, 1975 Costa Rica Tilton Davis used Gentry & Burger 2960 (F)
J. procumbens
2n = 24 Menzel, 1950, and herbarium specimens at BH, US
no data
plants grown at Blandy Experimental Farm, Boyce, Virginia. Accession Mary M. Young 101, date 10 - 9 -1948.
J. procumbens, informally referred to as variety tlaxcala

n = 12

  Mione's observations Mexico 4 observations / counts; microscopy done 17 May 1992 on Mione 349, an accession having fruits green at maturity!
J. procumbens, informally referred to as variety tlaxcala

n = 12

  Daniel Mugaburu working in the lab of Thomas Mione Mexico 2 observations / counts; microscopy done 24 Aug 1995 on Mione 596, an accession having fruits green at maturity!
J. procumbens

n = 12

  Mione's observations Mexico 2 observations / counts, Mione 456
J. procumbens

n = 12

  Mione's observations Mexico 22 observations / counts, Mione 350
J. procumbens

n = 12

  Mione's observations Mexico 5 observations / counts, Mione 502
J. procumbens

n = 12

  Mione's observations Mexico 6 observations / counts, Mione 548, and one coherent group of 24 chromosomes observed
J. procumbens

n = 12

  Mione's observations Mexico 6 observations / counts, Mione 587
 
       
J. repandidentata

n = 12

  Mione's observations Mexico several observations / counts, Mione 555
J. repandidentata

n = 12

  Mione's observations Mexico several observations / counts July 1992, Mione 571
 
       
J. sagastegui
n = 12
  Mione & Coe, 1996 Peru 6 observations/counts, Mione 536
 
       
J. umbellata
n = 12
  Mione et al. 1993 Peru 1 to 2 observations/counts, Mione 432
J. umbellata
2n = 24 Diers, 1961 Peru
 
       
J. ventricosa
n = 12
  Mione et al. 1993 Peru 7 observations/counts, Mione 535
 
       
J. viridiflora
n = 12
  Heiser, 1963 Ecuador  

 

Possibility of Polyploidy in Jaltomata

Menzel (1950) wrote that "One report of chromosome number for Saracha is found in the literature, for S. umbellata, 2n = 48 (Krenke, in Darlington and Janaki Ammal, 1945)." Saracha umbellata DC is actually a Jaltomata (Mione, unpublished; Alvarez, 1996, page 106).

Work to be done: track down Krenke's paper and see if Menzel's report of his count is correct and then see if Krenke deposited a specimen at an herbarium