Molecular Characterization of Genetic Diversity in Zingiberaceae

The family Zingiberaceae encompasses economically and medicinally valuable genera such as Curcuma, Zingiber and Amomum. Molecular characterisation of genetic diversity in this family has advanced through the application of high‐resolution markers, next‐generation sequencing and cytogenomic approaches. Studies employing simple sequence repeat (SSR), inter‐simple sequence repeat (ISSR) and single nucleotide polymorphism (SNP) markers have revealed extensive allelic variation both within and between wild and cultivated accessions. Genome assemblies of key species have uncovered shared whole‐genome duplication events and novel gene families associated with secondary metabolism, stress adaptation and tuber formation. Population structure analyses, linkage disequilibrium mapping and genome‐wide association studies (GWAS) have begun to link genotypic variation with phenotypic traits such as curcumin content, rhizome yield and resistance to biotic and abiotic stresses. These insights inform conservation strategies, germplasm management and marker‐assisted breeding aimed at improving yield, quality and resilience of Zingiberaceae crops on a global scale.

Research from Nature Portfolio

Recent studies have applied SSR markers to assess molecular divergence among high‐curcumin lines of turmeric. Analysis of over 150 accessions using 39 SSR loci detected 163 alleles with complete polymorphism, revealing three major genetic clusters correlated with geographic origin. Pairwise dissimilarity estimates and analysis of molecular variance (AMOVA) demonstrated that most variation resides within populations, underscoring the importance of intra‐population diversity for curcumin‐focused breeding. Cluster analyses and principal component approaches provided clear genetic groupings, guiding the selection of trait‐specific genotypes and underpinning marker‐assisted improvement of curcumin yield and quality.

Molecular Characterization of Genetic Diversity in Zingiberaceae publication trend

The graph below shows the total number of articles in molecular characterization of genetic diversity in zingiberaceae across all publications each year (not limited to Nature Index journals).

Technical terms

Simple sequence repeat (SSR) marker: A molecular marker based on tandemly repeated short DNA motifs, used to detect polymorphism among accessions.

Inter‐simple sequence repeat (ISSR) marker: A PCR‐based marker amplifying regions between SSR loci to assess genetic variation.

Single nucleotide polymorphism (SNP): A variation at a single base position in the genome, serving as a high‐resolution marker for diversity and association studies.

Analysis of molecular variance (AMOVA): A statistical method to partition genetic variation within and among populations.

Genome‐wide association study (GWAS): An approach linking genetic variants across the genome to phenotypic traits by assessing marker–trait correlations in a structured population.

References

1. Molecular genetic divergence analysis amongst high curcumin lines of Golden Crop (Curcuma longa L.) using SSR marker and use in trait-specific breeding. Scientific Reports (2023).
2. A chromosome-scale genome assembly of turmeric provides insights into curcumin biosynthesis and tuber formation mechanism. Frontiers in Plant Science (2022).
3. Genetic diversity and gene differentiation among ten species of Zingiberaceae from Eastern India. 3 Biotech (2013).
4. Genome-wide association study of the loci and candidate genes associated with agronomic traits in Amomum villosum Lour. PLOS ONE (2024).