8Gallaisl A, Hirel B. An approach to the genetics of ni- trogen use efficiency in maize[J]. Journal of Experimen- tal Botany, 2004,55(396) :295-306.
9Hirel B, I.e Gouis J, Ney B, et al. The challenge of im- proving nitrogen use efficiency in crop plants:towards a more central role for genetic variability and quantitative genetics within integrated approaches[J]. Journal of Experimental Botany, 2007,58(9) :2369 2387.
10Presterl T, Seitz G, I.andbeck M, et al. Improving Ni trogen-Use Efficiency in European Maize: Estimation of Quantitative Genetic Parameters [ J ]. Crop Science, 2003,43,(4) : 1259-1265.