Local Adaptation and Genetic Diversity in Plant Populations

Local adaptation and genetic diversity underpin the capacity of plant populations to persist and evolve under spatially and temporally heterogeneous conditions. Local adaptation arises when divergent selection across environmental gradients drives the fixation of alleles that confer fitness advantages in particular habitats, while gene flow, genetic drift and mutation shape the distribution of genetic variation within and among populations. High genetic diversity provides the raw material for selection and may buffer populations against environmental change, whereas reduced diversity can limit adaptive potential. Advances in genomic sequencing, reciprocal transplant trials and landscape‐genetic analyses have enabled finer resolution of the genetic architecture underlying ecotypic differentiation, the scale of adaptive divergence and the interplay between phenotypic plasticity and fixed genetic responses. Insights from these approaches inform conservation strategies, restoration genetics and crop breeding by guiding the choice of seed sources, predicting responses to climate change and identifying candidate genes for adaptive traits.

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Local Adaptation and Genetic Diversity in Plant Populations publication trend

The graph below shows the total number of articles in local adaptation and genetic diversity in plant populations across all publications each year (not limited to Nature Index journals).

Technical terms

Local adaptation: The process by which a population evolves traits that confer a fitness advantage in its local environment.

Genetic diversity: The total genetic variation present within and among populations of a species.

Ecotype: A genetically distinct population adapted to specific environmental conditions.

Reciprocal transplant experiment: A method that tests local adaptation by growing populations in each other’s native habitats.

Quantitative trait locus (QTL): A genomic region associated with variation in a quantitative trait.

References

1. Adaptive genetic potential and plasticity of trait variation in the foundation prairie grass Andropogon gerardii across the US Great Plains’ climate gradient: Implications for climate change and restoration. Evolutionary Applications (2020).
2. Geographic patterns of genomic diversity and structure in the C4 grass Panicum hallii across its natural distribution. AoB Plants (2021).
3. Adaptive differentiation of Festuca rubra along a climate gradient revealed by molecular markers and quantitative traits. PLOS ONE (2018).