Genetic Diversity and Agronomic Potential of Bambara Groundnut

Bambara groundnut (Vigna subterranea) is an underutilised legume native to sub-Saharan Africa with exceptional resilience to drought and poor soils. Its genetic diversity is manifested in distinct landraces exhibiting variation in flowering time, seed size, pod yield and adaptive traits such as photoperiod sensitivity and hard-to-cook characteristics. Modern analyses of phenotypic and molecular markers have revealed ample variability across accessions, enabling the identification of high-yielding lines and alleles associated with stress tolerance. Agronomically, the crop contributes to food security through nitrogen fixation, soil improvement and stable yields under low-input systems. Its nutritional profile—rich in plant protein, essential minerals and bioactive compounds—supports both human diets and animal feed. Efforts to integrate elite genotypes into breeding programmes aim to overcome negative traits and to tailor new varieties for diverse environments. Recent advances in genomics, coupled with strategic germplasm conservation and participatory selection, have opened pathways to mainstream the crop in climate-smart agriculture and value chains.

Research from Nature Portfolio

Studies under multi-environment trials have quantified 34 agronomic and yield-related traits across diverse accessions, uncovering stable, high-performing lines for specific environments. Principal component analysis and cluster mapping delineated groups of accessions, highlighting one genotype with superior pod number, seed weight and harvest index for recommendation in varied agroecological zones. Complementary work employing qualitative and quantitative trait analysis in controlled trials assessed heritability and genetic advance for key yield components. High genotypic and phenotypic coefficients of variation for pod and seed weight, coupled with very high heritability estimates, have identified promising genotypes with up to 70 % yield increase over population means. These findings establish a robust framework for crossing superior lines and for implementing marker-assisted selection to expedite the development of elite cultivars.

Genetic Diversity and Agronomic Potential of Bambara Groundnut publication trend

The graph below shows the total number of articles in genetic diversity and agronomic potential of bambara groundnut across all publications each year (not limited to Nature Index journals).

Technical terms

Landrace: A locally adapted, genetically diverse population maintained through traditional farming.

Germplasm: The collection of genetic resources used for breeding and conservation.

Heritability: The proportion of observed trait variation attributable to genetic factors under specific conditions.

Quantitative Trait Loci (QTL): Genomic regions associated with variation in a quantitative trait.

Genome-Wide Association Study (GWAS): An approach that scans the genome for statistical associations between markers and phenotypic traits.

References

1. Genome-Wide association analysis of phenotypic traits in Bambara groundnut under drought-stressed and non-stressed conditions based on DArTseq SNP. Frontiers in Plant Science (2023).
2. Exploring phenotypic variation of diverse bambara groundnut (Vigna subterranea L) origin and development of mini‐core collection for future breeding. Food and Energy Security (2023).
3. Genetic variation and characterization of Bambara groundnut [Vigna subterranea (L.) verdc.] accessions under multi-environments considering yield and yield components performance. Scientific Reports (2023).
4. Genetic analysis and selection of Bambara groundnut (Vigna subterranea [L.] Verdc.) landraces for high yield revealed by qualitative and quantitative traits. Scientific Reports (2021).
5. Bambara groundnut: an exemplar underutilised legume for resilience under climate change. Planta (2019).
6. Bambara Groundnut: An Underutilized Leguminous Crop for Global Food Security and Nutrition. Frontiers in Nutrition (2020).