Diversity of Water Yam ( Dioscorea alata L.) Accessions from Côte d'Ivoire Based on SNP Markers and Agronomic Traits

(L.), also referred to as water, winged, or greater yam, is one of the most economically important staple food crops in tropical and subtropical areas. In Côte d'Ivoire, it represents, along with other yam species, the largest food crop and significantly contributes to food security. However, s...

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Bibliographic Details
Published in:Plants (Basel) 2021-11, Vol.10 (12), p.2562
Main Authors: Bakayoko, Lassana, Pokou, Désiré N'Da, Kouassi, Abou Bakari, Agre, Paterne A, Kouakou, Amani Michel, Dibi, Konan Evrard Brice, Nzue, Boni, Mondo, Jean M, Adebola, Patrick, Akintayo, Oluyemi T, Asfaw, Asrat, N'Guetta, Assanvo Simon Pierre
Format: Article
Language:English
Subjects:
Agricultural production
agronomic trait
Agronomy
Cluster analysis
Clustering
DArT-seq
Dioscorea alata
Discriminant analysis
Disease
Economic importance
Food security
Genetic diversity
Genetic variability
Genotype & phenotype
Germplasm
Heritability
Markers
molecular markers
Morphology
Phylogeny
Population
population structure
Probability
Research facilities
Resource management
Single-nucleotide polymorphism
Variance analysis
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Summary:(L.), also referred to as water, winged, or greater yam, is one of the most economically important staple food crops in tropical and subtropical areas. In Côte d'Ivoire, it represents, along with other yam species, the largest food crop and significantly contributes to food security. However, studies focusing on better understanding the structure and extent of genetic diversity among accessions, using molecular and phenotypic traits, are limited. This study was, therefore, conducted to assess the pattern of genetic variability in a set of 188 accessions from the National Agronomic Research Centre (CNRA) genebank using 11,722 SNP markers (generated by the Diversity Arrays Technology) and nine agronomic traits. Phylogenetic analyses using hierarchical clustering, admixture, kinship, and Discriminant analysis of principal component (DAPC) all assigned the accessions into four main clusters. Genetic diversity assessment using molecular-based SNP markers showed a high proportion of polymorphic SNPs (87.81%). The analysis of molecular variance (AMOVA) showed low molecular variability within genetic groups. In addition, the agronomic traits evaluated for two years in field conditions showed a high heritability and high variability among accessions. This study provides insights into the genetic diversity among accessions in the CNRA genebank and opens an avenue for sustainable resource management and the identification of promising parental clones for water yam breeding programs in Côte d'Ivoire.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants10122562