Abstract:

The nutritional quality of rice is a major concern, along with the need to enhance productivity to feed the continuously growing population. Therefore, there is a requirement to breed high-yielding rice varieties with improved nutritional quality that can help combat malnutrition, a global health issue. Undoubtedly, breeding approaches have played a significant role in increasing rice yield while enhancing its nutritional content. In addition to traditional breeding techniques, other recent approaches, such as genetic engineering, gene editing, omics methods, and agronomic practices, must also be employed to meet the nutritional needs of the current population. In this review, we offered detailed information on the development of nutritionally improved rice varieties through the enhancement of protein content, micro- and macronutrients, vitamins, and oil quality using genetic engineering approaches. We also identified QTLs associated with amino acids, proteins, and micronutrients in rice. Furthermore, omics approaches provide a range of tools and techniques for effectively exploring resources and understanding the molecular mechanisms involved in trait development. Omics branches, including transcriptomics, proteomics, ionomics, and metabolomics, are efficiently utilized for improving rice nutrition. Therefore, by utilizing the information obtained from these techniques and incorporating all of these recent approaches, we can effectively modify the rice genome, directly enhancing the nutritional value of rice varieties. This will help address the challenges of malnutrition in the years to come.

Key words: rice, nutritional quality, quantitative trait locus, genetic engineering, omics, gene editing