Screening for wheat lines with enhanced nitrogen uptake capacities

Bijal Thakkar, Barbara Kettig

The new amendment of the German fertilizer regulation leads to an enhnced pressure on decreasin N fertilizer applications to winter wheat. To better expoit fertilizer nitrogen it is imprtant to improve physiological and morphological root traits that can enhance nitrogen uptake by roots. We exploit the genetic variation of the IPK genebank in early N uptake efficiency a dual approach. On the one hand, we search for allelic variation in ammonium and nitrate transporters in wheat that may show more fvourable biochemical transport properties to enhance nitrogen uptake. On the other hand, we screen pre-selected lines of the IPK genebank for their nitrogen uptake capacity using 15N-labeled ammonium nitrate.