1. Introduction
  1.1 Background and significance
  1.2 Research objectives
2. Traditional plant breeding methods
  2.1 Selection and hybridization
  2.2 Phenotypic evaluation and trait selection
  2.3 Limitations and challenges
3. Modern biotechnological approaches
  3.1 Genetic modification
  3.2 Marker-assisted selection
  3.3 Advantages and potential applications
4. Evaluation of crop traits related to yield
  4.1 Plant architecture and biomass production
  4.2 Disease resistance and pest tolerance
  4.3 Abiotic stress tolerance
5. Experimental design and methodology
  5.1 Selection of crop species and varieties
  5.2 Breeding techniques and treatments
  5.3 Data collection and statistical analysis