00334nam a2200121Ia 4500008004100000082002000041245003100061260003600092650002100128650001600149650001700165650003000182220204s9999    xx            000 0 und d  a631/635bADV.46 0aAdvances in agronomy. V 46  aSan DiegobAcademic Pressc1991  aCrop improvement  aDNA markers  aGene cloning  aMaize genetic improvement