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Julius Kühn-Institut (JKI)
Federal Research Institute
for Cultivated Plants

Dr. Andreas Stahl
Institutsleiter (m. d. W. d. G. b.)

Erwin-Baur-Str. 27
06484 Quedlinburg, Germany

Ms Sarah Stehr
Tel: +49(0)3946 47-602
Fax: +49(0)3946 47-600
rs@  julius-kuehn.  de

Experimental station for potato breeding
in Groß Lüsewitz

Rudolf-Schick-Platz 3
18190 Sanitz, Germany

Ms Gabriele Platek
Tel: +49(0)38209 45-100
Fax: +49(0)38209 45-120
rs@  julius-kuehn.  de

Institute booklet

Molecular analyses and markers

Molecular markers are efficient tools today in plant breeding research and applied plant breeding, facilitating an enhanced use of the genetic diversity detected in genetic resources with respect to biotic and abiotic stress. Marker-based selection to improve stress resistance/tolerance to biotic and abiotic stress can be conducted in early developmental stages of plant development independently of environmental conditions.

Based on the phenotypic data provided by  the other research groups of the Institute for Resistance Research and Stress Tolerance, genes and genomic regions involved in the reaction to biotic and abiotic stress are identified and closely linked markers are developed. These may be used to enhance the introgression of resistance genes derived from unadapted genetic resources, e.g. via marker based backcrossing procedures. Futhermore, they facilitate the combination of different resistance genes against one pathogen (pyramiding), thereby prolonging the usability of partly overcome resistance genes or improving the level of resistance.

For developing such markers, high throughput marker technologies, expression analyses, next generation sequencing technologies and publicly available sequence information are used. It is assumed that in the future, based on these techniques, genes and genetic networks involved in resistance/tolerance to biotic and abiotic stress will be identified on a large scale, facilitating the use of genetic resources at the allele level.