Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Publication DOI: 10.1007/BF00023216Journal NLM ID: 101091496Publisher: M. Nijhoff [etc.]
Institutions: Department of Plant Biology, University of Birmingham, Birmingham, UK, International Potato Center, Lima, Peru
This study investigated the possibility of recombining anew the genomes of the wild and cultivated progenitors of triploid S. juzepczukii and pentaploid S. currilobum by following the known evolutionary pathway of these two species. Before starting the actual breeding work, the Natural variation of S. jurepczukii, S. curtilobum and their wild progenitor S. acaule was studied from the point of view of morphology, quantitative and qualitative tuber glycoalkaloid content and frost resistance. The morphological study was supplemented by a study of the soluble tuber proteins employing polyacrylamide slab-electrophoresis. From 137 accessions of S. juzepczukii only 19 morphotypes were identified, 18 of which were also different in their protein spectra. The only red-tubered S. juzepczukii revealed a protein spectrum identical to that of the largest white-tubered group. On phylogenetic grounds, the occurrence of a red-tubered S. juzepczukii cannot be explained. It is concluded that this red clone is a somatic mutant for tuber colour which arose from a whitetubered clone. S. curtilobum was restricted in its variation to just two morphotypes differing only in tuber colour which are, however, identical chemotypes. This would be the case if one of the clones was a somatic mutant for tuber colour from the other one. The glycoalkaloids a-solanine,a-chaconine, tomatine, demissine and CL- and B-solamarine are shown to be useful taxonomic characters which confirm earlier hypotheses on the origin of S. juzepczukii and S. curtilobum. Laboratory tests showed the two cultivated species to be resistant to about -3°C whereas S. acaule is resistant to temperatures sometimes below -5°C. The diploid progenitor of S. juzepczukii, S. stenotomum, also has forms resistant to -3°C. The results of this study demonstrate that the proposed breeding scheme is possible.
proteins, Solarium juzepczukii, Solarium curtilobum, Solarium acaule, Solarium stenotomum, cultivated potato, wild potato, Natural variation, frost resistance, glycoalkaloids
Structure type: oligomer
Trivial name: solamargine, chacotriose solamargine
Compound class: saponin glycoside, glycoside, triterpenoid glycoside
Contained glycoepitopes: IEDB_136105,IEDB_142488,IEDB_146664,IEDB_225177,IEDB_885823,IEDB_983931,SB_192
Methods: slab-electrophoresis, detached leaflet method
NCBI Taxonomy refs (TaxIDs): 4107Reference(s) to other database(s): CCSD:
22909, CBank-STR:6364
Show glycosyltransferases
There is only one chemically distinct structure:
Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Publication DOI: 10.1007/BF00023216Journal NLM ID: 101091496Publisher: M. Nijhoff [etc.]
Institutions: Department of Plant Biology, University of Birmingham, Birmingham, UK, International Potato Center, Lima, Peru
This study investigated the possibility of recombining anew the genomes of the wild and cultivated progenitors of triploid S. juzepczukii and pentaploid S. currilobum by following the known evolutionary pathway of these two species. Before starting the actual breeding work, the Natural variation of S. jurepczukii, S. curtilobum and their wild progenitor S. acaule was studied from the point of view of morphology, quantitative and qualitative tuber glycoalkaloid content and frost resistance. The morphological study was supplemented by a study of the soluble tuber proteins employing polyacrylamide slab-electrophoresis. From 137 accessions of S. juzepczukii only 19 morphotypes were identified, 18 of which were also different in their protein spectra. The only red-tubered S. juzepczukii revealed a protein spectrum identical to that of the largest white-tubered group. On phylogenetic grounds, the occurrence of a red-tubered S. juzepczukii cannot be explained. It is concluded that this red clone is a somatic mutant for tuber colour which arose from a whitetubered clone. S. curtilobum was restricted in its variation to just two morphotypes differing only in tuber colour which are, however, identical chemotypes. This would be the case if one of the clones was a somatic mutant for tuber colour from the other one. The glycoalkaloids a-solanine,a-chaconine, tomatine, demissine and CL- and B-solamarine are shown to be useful taxonomic characters which confirm earlier hypotheses on the origin of S. juzepczukii and S. curtilobum. Laboratory tests showed the two cultivated species to be resistant to about -3°C whereas S. acaule is resistant to temperatures sometimes below -5°C. The diploid progenitor of S. juzepczukii, S. stenotomum, also has forms resistant to -3°C. The results of this study demonstrate that the proposed breeding scheme is possible.
proteins, Solarium juzepczukii, Solarium curtilobum, Solarium acaule, Solarium stenotomum, cultivated potato, wild potato, Natural variation, frost resistance, glycoalkaloids
Structure type: oligomer
Compound class: saponin glycoside
Contained glycoepitopes: IEDB_136044,IEDB_136105,IEDB_137472,IEDB_141794,IEDB_142488,IEDB_146664,IEDB_190606,IEDB_225177,IEDB_885823,IEDB_983931,SB_165,SB_166,SB_187,SB_192,SB_195,SB_7,SB_88
Methods: slab-electrophoresis, detached leaflet method
NCBI Taxonomy refs (TaxIDs): 4107Reference(s) to other database(s): CCSD:
10647, CBank-STR:8738
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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