Agronomic Performance and Yield Stability of Elite White Guinea Yam (Dioscorea rotundata) Genotypes Grown in Multiple Environments in Nigeria

Yam (Dioscorea spp.) is a main staple tuber crop in Nigeria and the West African region. Its performance is determined by genotypes and also the environment of growth. This study assessed the agronomic performance and yield stability of elite white yam (Dioscorea rotundata) genotypes across diverse...

Full description

Saved in:
Bibliographic Details
Published inAgronomy (Basel) Vol. 14; no. 9; p. 2093
Main Authors Olatunji, Alice Adenike, Gana, Andrew Saba, Tolorunse, Kehinde D., Agre, Paterne A., Adebola, Patrick, Asfaw, Asrat
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2024
Subjects
additive main effect and multiplicative interaction (AMMI)
Agricultural production
Agronomy
Correlation analysis
Crop diseases
Dioscorea rotundata
Disease resistance
Eigenvectors
Food security
Food supply
genetic variability
Genotype & phenotype
Genotypes
Growing season
heritability
multi-trait stability index (MTSI)
principal component analysis (PCA)
Principal components analysis
Stability analysis
Variance analysis
yam
Nigeria
Guinea
West Africa
Online AccessGet full text

Cover

More Information
Summary:Yam (Dioscorea spp.) is a main staple tuber crop in Nigeria and the West African region. Its performance is determined by genotypes and also the environment of growth. This study assessed the agronomic performance and yield stability of elite white yam (Dioscorea rotundata) genotypes across diverse Nigerian environments. A total of 25 genotypes were evaluated at three locations in two consecutive growing seasons, 2022 and 2023, for fresh tuber yield, disease resistance, and tuber quality traits. The genotype’s performance and stability for the measured traits were assessed using various analytical tools such as additive main effects and multiplicative interaction (AMMI) and multi-trait stability index (MTSI). The AMMI analysis revealed significant differences among the genotypes and across the environments for all traits (p < 0.001, p < 0.01). The PCA revealed that the first two principal components (PC1 and PC2) explained a substantial portion of the total variation (49.84%). The MTSI identified four clones: G18, G19, G24, and G16 as promising candidates for improved yam production in Nigeria with high and stable performance for the multiple traits.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy14092093