Characterisation of the Phytophthora infestans resistance in cultivated potato (Solanum tuberosum) using the gene pool of the Julius Kühn Institute

Authors

  • Johanna Blossei Julius Kühn-Institut (JKI) - Bundesforschungsinstitut für Kulturpflanzen, Institut für Züchtungsforschung an landwirtschaftlichen Kulturen, Groß Lüsewitz

DOI:

https://doi.org/10.5073/20231122-143036-0

Keywords:

Potato, Phytophthora infestans, Late blight, Resistance

Abstract

The production of potato, as an important source of food has high annual yield losses due to late blight. Despite intensive research and breeding work, there is still no approved cultivar that bears a durable resistance. In the present study it was determined which wild relatives of the cultivated potato carry resistance to late blight and how this can be made accessible for progress in potato breeding. Based on this literature search, 85 species were found to have a resistance potential and about half of them are not yet further characterised. In addition, it was explained which new methods could be used to make potato breeding faster and more efficient in the future.
Another aim of this work was to characterise the JKI potato gene pool for late blight resistance. An examination of the pre-breeding clones for various resistance genes from wild relatives revealed that individual clones carry up to four of these resistance genes. As further investigations, two genome-wide association studies were performed. In the first, five QTL were detected on chromosomes 1, 7, 10 and 11, in the second, two marker-trait associations were detected on chromosomes 9 and 11.
Finally, it was analysed whether the amount of organic nitrogen fertilisation can influence late blight infestation in cultivars and pre-breeding clones. It was shown that the influence is marginal. Overall, however, in contrast to the cultivars, the clones were hardly or not at all infected at all fertilisation levels, so that they carry great potential for resistance breeding.
The results of this work can be used in potato breeding to develop cultivars with a possibly durable late blight resistance.

Downloads

Published

2023-12-21

Issue

2023

Section

Dissertation

License

Copyright (c) 2023 Johanna Blossei

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

 

Once a dissertation has been published, the copyright remains at the author. Herby, the author remains the right to further distribute and exploit the work.

License


The dissertations of the book series "Dissertationen aus dem Julius Kühn-Institut" are licensed under a Creative Commons Attribution 4.0 International license. 

You are free to:

  • Adapt — remix, transform, and build upon the material for any purpose, even commercially

Under the following terms:

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.