Plant breeding 274 Plant Breeding and Genetics 109 PLANT BREEDING 79 Plant Breeding 68 plant breeding 60 Crop improvement 31 Genetics 28 Biotechnology 27 Plants 27 Cytogenetics 26 Plant Production 25 Plant Propagation 25 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 24 Horticultural Crops, (New March 2000) 24 Crops 20 Field Crops, (New March 2000) 20 Plant Pests, (New March 2000) 20 Plant Physiology and Biochemistry 20 Biological Resources (Plant) 19 Plant diseases 19 Plant pests 19 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 19 Agronomy 18 Crop production 18 Genetic engineering 18 Medicinal Plants - Breeding 18 Medicinal Plants - Processing 18 Medicinal and Aromatic Plants 18 Agriculture 17 cytogenetics 17