Multivariate analysis of yield and quality traits in sweet potato genotypes (Ipomoea batatas L.)

• Published in: Scientia horticulturae 2024-03, Vol.328, p.112901, Article 112901
• Main Authors: Alam, Zakaria, Akter, Sanjida, Khan, Mohammad Anwar Hossain, Amin, Md Nurul, Karim, Md. Rejaul, Rahman, Md. Hasan Sofiur, Rashid, Md. Harunor, Rahman, Md. Mushfiqur, Mokarroma, Nadira, Sabuz, Ashfak Ahmed, Alam, Md. Jahangir, Roy, Tapon Kumar, Rahaman, Ebna Habib Md Shofiur, Ali, Mir Aszad, Chanda, Debashish, Sarker, Umakanta
• Format: Article
• Language: English
• Subjects: Broad-sense heritability; Cluster analysis; Genetic gain; Multi-trait Genotype-Ideotype Distance Index (MGIDI); Principal Component Analysis (PCA)
• ISSN: 0304-4238
• DOI: 10.1016/j.scienta.2024.112901

•Sweet potatoes were assessed using correlations, PCA, clustering, and heatmap.•The Sweet potato genotypes grouped into four clusters.•H5.ej.10 and Moz1.15 exhibited the highest beta-carotene and storage root yield.•BARI Mistialu-12 and H9.7.12 were found to best performers based on MGIDI Index.•Findings significantly assist in shaping future breeding and cultivation strategies. Improving sweet potato traits and genotype selection based on specific traits of interest is crucial to motivate farmers and rural households to enhance their livelihoods by increasing income and improving nutritional intake. This research offers a thorough analysis of genotype selection guidelines considering multiple traits of sweet potatoes, including vine length (VL), average root length (ARL), average root diameter (ARD), marketable storage root number (MRN), marketable storage root yield (MRY), non-marketable root number (NMRN), non-marketable root weight (NMRW), dry weight of root (DW), beta-carotene content (BC), vitamin C content (VC), starch content (ST), total sugar content (TS), total soluble solid (TSS), and titratable acidity (ACD). The findings showed that the genotype Moz1.15 achieved the highest MRY at 46.46 t/ha, H5.ej.10 displayed the top BC level at 48.94 mg/100 g, and Moz1.9 had the highest VC (23.89 mg/100 g). Furthermore, there was a significant positive correlation between VL and DW, TSS, ST, TS, and VC. Additionally, ARL, ARD, and MRN showed significant positive correlations with MRY. The principal component analysis (PCA) biplot further confirmed how traits were connected with each other. There were four separate clusters of genotypes found, each having its specific significant trait representation. The distance between these clusters ranged from 21.79 to 54.13, while within each cluster, the distances varied from 0 to 17.45. The factor analysis using the multi-trait genotype-ideotype distance index (MGIDI) showed that sweet potato traits played a substantial role in three distinct factors during both growing seasons (2020-21 and 2021-22). This allowed for the selection of genotypes capable of achieving favorable genetic gains ranging from 1.86% to 75.4%, alongside a broad-sense heritability (h2b) spanning from 64.9% to 99.8%. Through the application of the MGIDI index, a number of potential genotypes were identified, among which BARI Mistialu-12 and H9.7.12 stood out as consistently chosen across both years. These promising genotypes exhibited high perfor