Selection and Phenotyping for Drought Tolerance in Somatic Hybrids between Solanum tuberosum and Solanum bulbocastanum That Show Resistance to Late Blight, by Using a Semi-Automated Plant Phenotyping Platform

Tünde-Éva Dénes (), Imola Molnár, István Zoltán Vass, Imre Vass and Elena Rákosy-Tican
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Tünde-Éva Dénes: Biological Research Center Jibou, Babes-Bolyai University, 455200 Jibou, Romania
Imola Molnár: Plant Genetic Engineering Group, Department of Molecular Biology and Biotechnology, Faculty of Biology and Geology, Babes-Bolyai University, 400006 Cluj-Napoca, Romania
István Zoltán Vass: Institute of Plant Biology, Biological Research Centre, Hungarian Research Network, 6726 Szeged, Hungary
Imre Vass: Institute of Plant Biology, Biological Research Centre, Hungarian Research Network, 6726 Szeged, Hungary
Elena Rákosy-Tican: Plant Genetic Engineering Group, Department of Molecular Biology and Biotechnology, Faculty of Biology and Geology, Babes-Bolyai University, 400006 Cluj-Napoca, Romania

Agriculture, 2023, vol. 14, issue 1, 1-15

Abstract: Drought stress is one of the most limiting abiotic stresses for plant growth and development. Potato ( Solanum tuberosum L.), due to its shallow root system, is considered sensitive to drought. In potato breeding, the wild Solanum species may represent a good resource for disease and abiotic stress resistance genes, but their transfer is limited by sexual incompatibilities. Somatic hybrids (SH) between potato and the wild species Solanum bulbocastanum , sexually incompatible with potato, proved to be late-blight-resistant in laboratory and field assays. The aim of this study was to screen a series of somatic hybrids and derived backcrosses for drought stress tolerance. In vitro stress exposure (with 5% and 15% PEG 6000) allowed the selection of several tolerant genotypes in a short time. The eleven selected genotypes were tested by using a semi-automated plant phenotyping platform at the Biological Research Centre in Szeged, Hungary, where the plants’ biomass accumulation and photosynthesis under long-term drought conditions were monitored. The findings of this study affirm that the somatic hybrids between potato and S. bulbocastanum, along with their backcrosses, constitute valuable pre-breeding material. This is attributed to their possession of both late blight resistance and drought stress tolerance.

Keywords: potato somatic hybrids; drought; proline; photosynthesis; phenotyping; selection for stress-selection (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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