2Duvick D N.The contribution of breeding to yield advances in maize (Zea mays L.)[J].2005:83-145.
3Duvick D N.Developing Drought-and Low N-Tolerant Maize[J].Proceedings of Symposium,1997.
4Duvick D N.Genetic contributions to yield gains of U.S.hybrid maize,Genetic Contributions to Yield Gains of Five Major Crop Plants[J].CSSA,Madison,Wisconsin,1984.
5Hallauer A R.Introgression of Elite Subtropical and Tropical Germplasm with U.S.Com Belt Germplasm[J].North Central Regional Corn Breeding Meetings Program,2003.
6Hallauer A R,Miranda J B.Quantitative Genetics in Maize Breeding[J].Iowa State University Press/Ames,1988.
