Xingzhu Feng

Hainan Institute of Biotechnology, Haikou, 570206, Hainan, China
Author    Correspondence author
Biological Evidence, 2026, Vol. 16, No. 5   
Received: 10 Sep., 2026    Accepted: 13 Oct., 2026    Published: 22 Oct., 2026

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Yardlong bean is an important fresh leguminous vegetable in Asia. Conventional breeding has long emphasized agronomic traits such as yield, pod number, and pod length; however, as fresh-market demand increasingly focuses on marketability and eating quality, breeding objectives are gradually shifting from yield-oriented improvement toward the coordinated enhancement of both yield and pod quality. This study focuses on four major traits-pod length, tenderness, fiber composition, and pod color-and examines their effects on marketable pod type, fresh eating quality, optimal harvest stage, and market differentiation. Pod length exhibits substantial genetic variation, but its commercial value also depends on pod straightness, uniformity, earliness, and marketable output. Tenderness is closely associated with fiber accumulation, making delayed toughening and an extended tender-harvest window more relevant to production than simply reducing fiber content. Pod color is not only an important trait for market recognition but can also serve as an auxiliary indicator for screening functional quality attributes such as anthocyanin accumulation. Future quality-oriented breeding of yardlong bean should avoid maximizing individual traits in isolation, strengthen the utilization of diverse germplasm and multi-trait evaluation, and develop appropriate trait combinations for different production systems, distribution conditions, and consumer markets. Such an approach will facilitate the development of new cultivars combining stable yield, superior marketability, and strong market adaptability.

Yardlong bean; Quality-oriented breeding; Pod length; Tenderness; Fiber composition; Pod color; Market demand