Genetic engineering 239 Biotechnology 117 Genetic Engineering 75 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 36 Molecular biology 36 Genetics 32 Plant genetic engineering 32 Genetically engineered organisms 27 Transgenic plants 26 Plant Breeding and Genetics 25 Genetic engineering-- Biotechnology 22 Plants 22 DNA 20 Genes 20 Recombinant DNA 20 genetic engineering 20 Genomics 19 Microbiology 19 Plant breeding 19 Genetic transformation 17 Plant biotechnology 17 GENETIC ENGINEERING 16 Molecular Biology 15 Crops 14 Molecular genetics 13 DNA, Recombinant 11 Molecular Biology and Molecular Genetics, (Discontinued March 2000, Reinstated and Revised June 2002) 11 Genomes 10 Methodology 10 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 10