|Mohamed, Errebhi - UNIVERSITY OF MINNESOTA|
|Rosen, Carl - UNIV MINNESOTA|
|Martin, Max - UNIVERSITY OF WISCONSIN|
Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: May 16, 1996
Publication Date: N/A
Technical Abstract: During the 1993 growing season, 39 wild potato accessions were divided into relative nitrogen (N) use efficiency categories. Representatives of various N use efficiency categories were crossed with the haploid USW 551 (USW). During the 1994-95 growing seasons, forty day old seedlings of the wild parents, USW, and the successful crosses were transplanted from greenhouse to the field. The plants were subjected to two N treatments: 0 and 225 kgN/ha. The treatments were replicated three times in a split plot design with N as the main plot and species as the sub-plots. Tubers, roots plus stolons, shoots, and fruits were harvested separately. Because of severe insect damage in 1994, only 1995 data are presented. At low N, the highest total biomass accumulation was recorded for Russet Burbank, S. chacoense, USW x S. chacoense, and USW x S. commersoni, respectively. When plants were provided with N, descending ranking for total dry weight was as follows, Russet Burbank, USW x S. chacoense, and USW x S. commersoni. Despite the high biomass produced by Russet Burbank some wild/hybrid species accumulatedequal or higher amounts of tissue N under both low and high N environments. These results suggest that wild potato germplasm may be useful for improving N use efficiency in the potato crop.