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Tuber Flesh Colour, Enzymatic Discolouration, Dormancy and Late Blight Resistance of 29 Tuber-Bearing Accessions of Solanum spp.

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Abstract

Potato relatives adapted to many different habitats are promising sources of desirable agricultural traits for potato breeding. Wild potato relatives are preserved in different collections around the world, and their detailed description is key to their exploitation in practice. We described 29 seed accessions of 26 Solanum species originating from the VIR potato collection (Institute of Plant Industry – VIR, Saint Petersburg, Russia) and preserved in Poland. The description included resistance to Phytophthora infestans, tuber flesh colour, enzymatic discolouration and tuber dormancy (sprouting). Up to 13 genotypes were evaluated per accession. The evaluation was repeated in three years for each trait. Two P. infestans isolates were used in late blight resistance tests. Amongst all the tested accessions, five were resistant to both P. infestans isolates, including genotype 13_A2. Twenty-one accessions had white tuber flesh, and 13 accessions showed a lack of or weak enzymatic discolouration. Additionally, we found accessions that were whiter than the standard white-fleshed Polish potato cultivar Irys. In our material, we observed a large variation in the length of the sprouts after storage, indicating differences in the dormancy period length. Four accessions showed a lack of sprouting after 28 weeks of storage at 5–6 °C. The tested material is preserved as in vitro plants in the National Centre for Plant Genetic Resources: Polish Genebank (IHAR-PIB, Radzików, Poland), which will facilitate their use in breeding programs.

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Acknowledgements

We thank Mrs. Małgorzata Frączak and Anna Jarzyńska for technical assistance.

Funding

The research was financed within the G2P-SOL project (Title: Linking genetic resources, genomes and phenotypes of Solanaceous crops) that has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 677379.

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M. J. maintained the plant material, prepared inocula of P. infestans, collected phenotype data, performed the analyses and wrote the paper; P. S.-D. maintained the plant material and participated in the design of the study; S. S. maintained P. infestans cultures and prepared inocula; D. M. introduced and maintained the plant material in in vitro cultures; J. Ś. participated in the design of the study and its coordination and wrote the paper. All authors proofread the manuscript.

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Correspondence to Marta Janiszewska.

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The authors declare no competing interests.

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Janiszewska, M., Smyda-Dajmund, P., Sobkowiak, S. et al. Tuber Flesh Colour, Enzymatic Discolouration, Dormancy and Late Blight Resistance of 29 Tuber-Bearing Accessions of Solanum spp.. Potato Res. 66, 1–21 (2023). https://doi.org/10.1007/s11540-022-09558-9

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  • DOI: https://doi.org/10.1007/s11540-022-09558-9

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