Winged Bean (<i>Psophocarpus tetragonolobus</i>)
Abstract
Winged bean (Psophocarpus tetragonolobus) is an underutilized legume with great promise for widespread cultivation in the humid tropics, offering yields and nutritional value similar to soybean. It is a valuable substitute for soybeans in tropical regions worldwide, with nearly all parts of the plant being edible when properly prepared. Challenges arise, however, from the presence of antinutritional factors and the high costs associated with the indeterminate growth pattern of winged bean. Limited attention to its genomic study and germplasm characterization has hindered breeding efforts. In this chapter, we analyse the reasons for this and offer techniques for making better use of its genetic resources and allied Psophocarpus species in producing superior variations within the orphan legume. Employing genomics and breeding techniques, such as RNAi, marker assisted backcross breeding (MABB), transcriptomics, and CRISPR/Cas9, holds immense potential for developing disease-resistant, early maturing, high-yielding and determinate varieties of winged bean, as well as creating consumer-friendly value-added products from winged bean. A focused and organized research strategy is recommended to unlock the full potential of winged bean and improve global food security.