Genetic Diversity Assessment in Forage Crop Species

Genetic diversity assessment in forage crops is fundamental to sustainable agriculture, enabling breeders and conservationists to harness variation for crop improvement and biodiversity preservation. Forage species, including grasses and legumes, underpin livestock production globally, with their genetic variability influencing traits such as yield, nutritional quality, stress tolerance and adaptability to climatic fluctuations. Contemporary assessments combine phenotypic evaluations with molecular markers to dissect genetic structure within and among populations. High-throughput sequencing and genotyping platforms facilitate genome-wide surveys of allelic variation, while multivariate analyses and population-genetic metrics elucidate patterns of diversity, differentiation and gene flow. These insights guide the strategic deployment of germplasm, support the identification of adaptive loci and inform breeding programmes aimed at enhancing resilience and productivity of forage systems worldwide.

Research from Nature Portfolio

Recent studies have applied genotyping by sequencing to natural populations and cultivated varieties of red clover, revealing four distinct regional clusters that correspond to geographic origins across Europe and Asia. Outlier-detection methods pinpointed loci under selection, including single nucleotide polymorphisms associated with flowering time and growth habit. Rapid decay of linkage disequilibrium and absence of historical bottlenecks indicated a rich reservoir of standing variation. These findings establish a genomic framework for mining adaptive alleles and accelerating marker-assisted breeding in forage legumes.

Genetic Diversity Assessment in Forage Crop Species publication trend

The graph below shows the total number of articles in genetic diversity assessment in forage crop species across all publications each year (not limited to Nature Index journals).

Technical terms

Genetic diversity: Variation in the genetic composition of individuals within or among populations, essential for adaptability and resilience.

Molecular marker: A DNA sequence variant used to track genetic differences, often employed in assessing diversity and linkage with traits.

Genotyping by sequencing (GBS): A high-throughput approach that combines restriction enzyme digestion and sequencing to discover and genotype genome-wide markers.

Linkage disequilibrium: Non-random association of alleles at different loci, providing information on recombination history and selection.

Allele frequency: The proportion of a specific genetic variant among all alleles in a population, used to quantify differentiation and selection.

References

1. Multi-location trials and population-based genotyping reveal high diversity and adaptation to breeding environments in a large collection of red clover. Frontiers in Plant Science (2023).
2. Population structure and genetic diversity in red clover (Trifolium pratense L.) germplasm. Scientific Reports (2020).
3. Genetic Differentiation of Red Clover (Trifolium pratense L.) Cultivars and Their Wild Relatives †. Agriculture (2023).