Articles
Evaluation of salinity tolerance in a Fragaria F2 population
Article number
1412_17
Pages
111 – 116
Language
English
Abstract
Salinity in soils or irrigation water is a growing global problem for agricultural and horticultural production.
The common strawberry (Fragaria ×ananassa Duch.) can be classified as highly susceptible for damages caused by salinity.
Therefore, salt tolerance is an important breeding goal in Mediterranean cultivation systems and in substrate culture.
Genetic resources with high tolerance can be expected from habitats exposed to high salt contents in the soil. Fragaria chiloensis ssp. lucida is growing on the coastline of California and is adapted to the direct influence of the Pacific Ocean.
To study heritability and select tolerant genotypes a model population was used.
The susceptible cultivar ‘Senga Sengana’ and a highly tolerant accession of Fragaria chiloensis ssp. lucida from California, USA were cross-bred.
The selfing of one F1 hybrid resulted in a segregating population with 95 genotypes and was exposed to control and salt treatment (0 and 25 mmol L‑1 of table salt, EC value 1.1 and 3.6, respectively) for three months.
The plants were grown in a randomized system on a greenhouse table and monitored every week for stress symptoms.
Clear necrotic damages and decrease in vigor allowed to create a scoring scale from 1 to 9 and showed a segregation in salt tolerance which serves as a valuable phenotyping for later molecular association studies.
Single genotypes could be selected and are suggested for cross-breeding for salt tolerant strawberry cultivars.
The common strawberry (Fragaria ×ananassa Duch.) can be classified as highly susceptible for damages caused by salinity.
Therefore, salt tolerance is an important breeding goal in Mediterranean cultivation systems and in substrate culture.
Genetic resources with high tolerance can be expected from habitats exposed to high salt contents in the soil. Fragaria chiloensis ssp. lucida is growing on the coastline of California and is adapted to the direct influence of the Pacific Ocean.
To study heritability and select tolerant genotypes a model population was used.
The susceptible cultivar ‘Senga Sengana’ and a highly tolerant accession of Fragaria chiloensis ssp. lucida from California, USA were cross-bred.
The selfing of one F1 hybrid resulted in a segregating population with 95 genotypes and was exposed to control and salt treatment (0 and 25 mmol L‑1 of table salt, EC value 1.1 and 3.6, respectively) for three months.
The plants were grown in a randomized system on a greenhouse table and monitored every week for stress symptoms.
Clear necrotic damages and decrease in vigor allowed to create a scoring scale from 1 to 9 and showed a segregation in salt tolerance which serves as a valuable phenotyping for later molecular association studies.
Single genotypes could be selected and are suggested for cross-breeding for salt tolerant strawberry cultivars.
Authors
T. Kortekamp, T.-W. Chen, H. Wagner, K. Olbricht
Keywords
salinity stress, strawberry, susceptibility evaluation, symptomatology
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