Biotechnological innovations in legumes: progress, challenges, and sustainable solutions for agriculture

Legumes are vital to global food security and sustainable agriculture, offering rich nutritional value and enhancing soil fertility through nitrogen fixation. However, their production is increasingly challenged by abiotic stresses such as drought, salinity, and heat, as well as biotic stresses such as pests and pathogens. These challenges, compounded by climate change, necessitate innovative solutions to improve legume resilience and productivity. While traditional breeding has achieved significant success, its limitations – prolonged timelines, restricted genetic diversity, and susceptibility to genotype–environment interactions – highlights the need for advanced approaches. Biotechnological innovations, including genetic engineering and genome-editing tools like CRISPR/Cas9, have revolutionized legume improvement by enabling precise and efficient trait modifications. This chapter examines key achievements such as the development of drought-tolerant chickpeas, pest-resistant cowpeas, and nutritionally enhanced soybeans. Emerging techniques like base editing and multiplex gene editing have further refined trait improvements, optimizing nitrogen fixation, stress tolerance, and yield-related characteristics. Additionally, integrating high-throughput sequencing and phenotyping platforms has expedited the identification of genes critical for legume adaptation to diverse agro-climatic conditions. The socioeconomic and environmental implications of genetically engineered legumes are also explored. While, these crops address growing demands for plant-based proteins and sustainable farming, challenges persist, including gene flow risks, pest resistance, and public acceptance. Strengthened regulatory frameworks, transparent communication, and collaborative research are essential for addressing these barriers. Biotechnology offers transformative potential for legumes, aligning with the United Nations’ Sustainable Development Goals of reducing hunger and ensuring environmental sustainability. This chapter underscores the critical role of biotechnological advancements in fostering resilient, high-yielding, and climate-smart legume crops.