New approaches using selection index in sweet potato breeding for biofortification

• Published in: Crop breeding and applied biotechnology Vol. 23; no. 3
• Main Authors: Silva, Hellen Cristina da, Peressin, Valdemir Antonio, Feltran, José Carlos, Factor, Thiago Leandro, Fabri, Eliane Gomes, Bernacci, Luís Carlos, Nomura, João Vitor, Piotto, Fernando Angelo
• Format: Journal Article
• Language: English; Portuguese
• Published: Vicosa Crop Breeding and Applied Biotechnology 2023
• Subjects: AGRONOMY; BIOTECHNOLOGY & APPLIED MICROBIOLOGY; Carotene; Cloning; Color; Cultivars; Dry matter; Ipomoea batatas; Plant breeding; Planting season; Potatoes; Stability analysis; Sweet potatoes; β-Carotene; Nutritional security; Ipomoea batatas (L.) Lam; Root β-carotene content
• ISSN: 1518-7853; 1984-7033; 1984-7033
• DOI: 10.1590/1984-70332023v23n3a24

The objective of this research was to select orange-fleshed sweet potato clones with high stability, yield, and β-carotene content in different planting seasons, using a selection index. Joint analysis of experiments and analysis of responsiveness and stability by the GGE biplot method were performed for the variables yield, dry matter percentage, and root flesh color. The variables yield, dry matter, color and stability were used to estimate a selection index. The GGE biplot analysis indicated that there are differences among clones in stability for Yield. However, the percentage of dry matter and color of the roots show low interaction in the different environments. Because of that, stability for yield was included in the selection index, together with yield, dry matter, and root orange color intensity. Finally, the selection index based on stability, yield, dry matter percentage and root color was efficient in the selection of a new biofortified sweet potato cultivar.