The value of mutants in elucidating biochemical processes has been well-demonstrated in simple organisms. However, the approach has seldom been used in plants where simple selection schemes for biochemical characters can be difficult to devise. We have proposed that selection of a nitrate-reductase-(NR) deficient mutant of soybean could have a beneficial effect on nitrogen fixation.
Ryan, Sarah A. and Harper, James E.
"Research Notes : Mutagenesis of soybeans,"
Soybean Genetics Newsletter: Vol. 10
, Article 13.
Available at: http://lib.dr.iastate.edu/soybeangenetics/vol10/iss1/13