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Some sources for additional potato evaluation data 

Content

Glycoalkaloids

 From 17 accessions glycoalkaloid content in tubers (in 3 cases in leaves too) have been published by van Gelder et al. (1988). Some more results are available in his thesis (van Gelder, 1989) on page 140-141. They have not been included in the database.

Nitrogen uptake and use efficiency

 Preliminary results on 39 accessions from 23 wild potato species have been published by Errebhi et al. (1998, 1999). Next to Solanum commersonii, S. kurtzianum, S. microdontum and S. phureja the species S. chacoense (PI 320293 = CPC 3756) had the highest biomass accumulation and N uptake efficiency.

Starch & amylose content and size & morphology of starch granules

 Preliminary results on 84 accessions from 57 wild / primitive potato species from the Dutch-German Potato Collection have been published by Schittenhelm & Menge-Hartmann (1992). The mean starch content per accession ranged from 7.4 - 20.4% , the amylose content from 18.6 - 31.7% , the granule size from 18.7 - 35.2µm , the measure of dispersion from 0.35 - 0.59 and the length/width ration of the granules from 1.32 - 2.05 . One genotype of S. sandemanii (from CGN 17600) had an amylose content of 51.4%. The control starch varieties had amylose contents from 26.6 - 34.6%. The data on mean amylose content, tuber yield and dry matter content have been included in the database.

Protein content

 Results on tuber crude protein content determined by the Bayerische Landesanstalt für Bodenkultur und Pflanzenbau at Freising (1977) using the Kjeldahl method. These results have not been included in the database.


CGN (or BGRC) no. species / variety genotypes min-max protein content (%)
  Irmgard 1 2.0
  Werta 1 2.8

CGN 23482

phureja

1

2.3

CGN 17666

phureja

1

1.4

B-7909

phureja

4

2.0 - 2.1

CGN 17668

phureja

3

1.8 - 1.9

CGN 22697

phureja

6

1.5 - 2.6

CGN 17670

phureja

6

1.3 - 1.7

CGN 17671

phureja

4

1.6 - 2.6

B-7916

phureja

1

2.8

CGN 20559

phureja

11

1.4 - 3.6

CGN 18281

phureja

2

1.3 - 2.1

B-7919

 stenotomum 3 1.2
CGN 24596 stenotomum 11 1.3 - 2.2
B-7489 stenotomum ssp. goniocalyx 1 1.3

Potato tuber moth

The results of research in Italy on resistance to Potato tuber moth (Phthorimaea operculella) were published by Arnone et al. (1998) and Musmeci et al. (1997). The results have not been included in our database and are only compiled in the table below. Antibiosis (for tubers or leaves) is measured by the pupation rate, indicating the survival rate of the insects. Fecundity is the mean number of eggs. The listed numbers are from tests where the insects had no feeding or oviposition choice. For the results of antixenosis tests (where insects have choice) see both publications.

CGN no. PI no. geno-types species / variety pupation rate (%) on tubers mines / tuber pupation rate (%) on leaves fecundity (in no choice test)
      Desiree 89.3 2.6 83.25 101.25
      Spunta 66.8 4.7    

17716

 

1

berthaultii

 

 

66.5

0.0

18219

498103

1

berthaultii

 

 

89.0

26.67

18189

 

1

berthaultii

85.2

 

 

 

18329

 

1

commersonii

94.9

 

 

 

17745

275236

4

pinnatisectum

0

 

17 - 39

26.5 - 33

23012

275234

1

pinnatisectum

0

0.2

 

 

18094

 

1

sparsipilum

81.1

 

 

 

18218

498132

5

sparsipilum

0 - 56.7

0.1 - 0.6

 

 

18230

498139

5

sparsipilum

0 - 49.8

0.3 - 0.5

79

77.17

17887

472983

1

spegazzini

43.7

 

 

 

18101

 

1

sucrense

100

 

 

 

23490

473245

1

tarijense

61.3

 

 

 

18107

473221

 3 tarijense 57.7 - 84.7      

Late blight (Phytophthora infestans)

 In the framework of the Dutch Parapluplan, theme BO-06-427 Phytophthora (Project 4.1 resistance sources), 836 genotypes of 390 wild potato accessions have been screened by V.G.A.A. Vleeshouwers for resistance to Phytophthora infestans (isolate IPO-complex) by means of a leaf and/or a field test. Amongst others, the results are included on the SolRgenes website.

Feedback to: Lana.deBruijn@wur.nl,
Centre for Genetic Resources the Netherlands (CGN), Wageningen, the Netherlands.