Glycoalkaloids and acclimation capacity of hybrids between Solanum tuberosum and the incongruent hardy species Solanum commersonii

D. Carputo*, A. Terra, A. Barone, F. Esposito, V. Fogliano, L. Monti, L. Frusciante

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)

Abstract

F1 and backcross hybrids between sexually incompatible species Solanum commersonii and Solanum tuberosum were characterized for glycoalkaloid content and capacity to cold acclimate. Glycoalkaloid (GA) analysis revealed that F1 triploids and BC1 pentaploids contained the glycoalkaloids of both parents. In BC2 (near) tetraploids the situation was different, in that some hybrids produced the GAs of both parents, whereas others contained only the GAs of S. tuberosum. This suggested that the GAs from S. commersonii may be lost rapidly, and that they may have a simple genetic control. The total tuber GA content of BC1 and BC 2 groups averaged quite acceptable levels (165.9 mg/kg in BC 1 and 192.8 mg/kg in BC2), with six genotypes having a GA content <200 mg/kg fresh weight. The F1 triploid hybrids expressed a capacity to cold acclimate similar to S. commersonii, whereas BC1 and BC2 genotypes generally displayed an acclimation capacity higher than the sensitive parent but lower than S. commersonii. However, one BC1 and two BC2 genotypes with an acclimation capacity as high as S. commersonii were identified. The polar lipid fatty acid composition in S. commersonii and its hybrid derivatives showed that, following acclimation, there was a significant increase in 18:3. Correlation analysis between the capacity to cold acclimate and the increase in 18:3 was significant, suggesting that the increase in 18:3 can be used as a biochemical marker for the assisted selection of cold-acclimating genotypes in segregating populations.

Original languageEnglish
Pages (from-to)1187-1194
Number of pages8
JournalTheoretical and Applied Genetics
Volume107
Issue number7
DOIs
Publication statusPublished - Nov 2003
Externally publishedYes

Keywords

  • Fatty acids
  • Genomic ratios
  • Interspecific hybridization
  • Ion leakage
  • Potato

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