Identification of genes involved in a water stress response in timothy and mapping of orthologous loci in perennial ryegrass

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  • Kristina Jonavičienė, 1.Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Litauen
  • Bruno Studer
  • ,
  • Torben Asp
  • Louise Bach Jensen, Roche Diagnostics A/S, Danmark
  • V Paplauskiene, 1.Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Litauen
  • S Lazauskas, 1.Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Litauen
  • Gintaras Brazauskas, 1.Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry, Litauen

In order to characterize the response of selected grasses to water stress, relative water content (RWC) in leaves and quantum efficiency of photosystem 2 (Fv/Fm) were measured in Phleum pratense L., P. bertolonii DC. and P. phleoides H. Karst. during 6 d of water stress. The results indicated differential responses to water stress among the three Phleum species with higher water deficit sensitivity of P. pratense and P. bertolonii than that of P. phleoides. The cDNA-amplified fragment length polymorphism (cDNA-AFLP) technique was applied to identify differentially expressed genes responding to water stress in P. pratense. Cloned and sequenced differentially expressed fragments (DEFs) were used for primer design in order to identify orthologous genes in Lolium perenne L. Twelve genes orthologous to P. pratense DEFs were mapped in the L. perenne mapping population VrnA based on a high resolution melting curve analysis (HRM). This study provides genomic information about 29 differentially expressed genes after water stress in P. pratense and reports on the identification and mapping of twelve orthologs in L. perenne.

OriginalsprogEngelsk
TidsskriftBiologia Plantarum
Vol/bind56
Nummer3
Sider (fra-til)473-483
Antal sider11
ISSN0006-3134
DOI
StatusUdgivet - sep. 2012

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