Exceptionally low genomic diversity in the underutilised legume Kersting’s groundnut

Tsz-Yan Cheung, Konoutan M. Kafoutchoni, Eric E. Agoyi, Ting-Fung Chan and Mark A. Chapman ()
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Tsz-Yan Cheung: The Chinese University of Hong Kong
Konoutan M. Kafoutchoni: University of Abomey-Calavi
Eric E. Agoyi: University of Abomey-Calavi
Ting-Fung Chan: The Chinese University of Hong Kong
Mark A. Chapman: University of Southampton

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Identifying crops with novel and climate resilience traits is imperative to ensure food security. Without a basic understanding of the genomes and genomic diversity of these crops they will remain underutilised or could even become lost. Kersting’s groundnut [Macrotyloma geocarpum (Harms) Maréchal & Baudet] is one such crop, regarded as a useful, drought tolerant and sometimes valuable legume. Here, we present the assembly and annotation of the genome of Kersting’s groundnut and an analysis of genomic diversity across a diversity panel. Accessions are grouped by geography and seed coat colour, one of the key traits used to describe the accessions. Four candidate genes involved in pathways relating to pigments or flavonoids are revealed. One of the important findings is that Kersting’s groundnut retains very low diversity, about 85-95% less than two other legumes, suggesting a pressing need to conserve the existing diversity of Kersting’s groundnut.

Date: 2025
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DOI: 10.1038/s41467-025-60494-x

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