Ecological genetics of local adaptation in Arabidopsis: An 8‐year field experiment DOI Creative Commons
Christopher G. Oakley,

Douglas W. Schemske,

John McKay

et al.

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(16), P. 4570 - 4583

Published: June 14, 2023

Abstract There is considerable evidence for local adaptation in nature, yet important questions remain regarding its genetic basis. How many loci are involved? What their effect sizes? the relative importance of conditional neutrality versus trade‐offs? Here we address these self‐pollinating, annual plant Arabidopsis thaliana . We used 400 recombinant inbred lines (RILs) derived from two locally adapted populations Italy and Sweden, grew RILs parents at parental locations, mapped quantitative trait (QTL) mean fitness (fruits/seedling planted). previously published results first 3 years study, here add five additional years, providing a unique opportunity to assess how temporal variation selection might affect QTL detection classification. found 10 adaptive one maladaptive Italy, six four Sweden. The discovery both sites suggests that even not always genotypic optimum. Mean sizes QTL, 0.97 0.55 fruits respectively, were large (approximately 8 fruits/seedling planted sites). Both trade‐offs (four cases) (seven contribute this system. 8‐year dataset provided greater power detect estimate locations compared our previous 3‐year identifying new trade‐off resolving into conditionally QTL.

Language: Английский

Long-term studies provide unique insights into evolution DOI
James T. Stroud, William C. Ratcliff

Nature, Journal Year: 2025, Volume and Issue: 639(8055), P. 589 - 601

Published: March 19, 2025

Language: Английский

Citations

3
A large-effect fitness trade-off across environments is explained by a single mutation affecting cold acclimation DOI
Gwonjin Lee, Brian J. Sanderson, Thomas James Ellis

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(6)

Published: Jan. 30, 2024

Identifying the genetic basis of local adaptation and fitness trade-offs across environments is a central goal evolutionary biology. Cold acclimation an adaptive plastic response for surviving seasonal freezing, costs may be general mechanism in temperate zone species. Starting with locally adapted ecotypes

Language: Английский

Citations

10
Green revolution gene drives adaptation of Arabidopsis to the extremely high altitude DOI
Xinghui Hou, Yong‐Chao Xu, Tianshu Sun

et al.

Science China Life Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

Citations

1
A few essential genetic loci distinguish Penstemon species with flowers adapted to pollination by bees or hummingbirds DOI Creative Commons
Carolyn A. Wessinger, Amanda M. Katzer, Paul M. Hime

et al.

PLoS Biology, Journal Year: 2023, Volume and Issue: 21(9), P. e3002294 - e3002294

Published: Sept. 28, 2023

In the formation of species, adaptation by natural selection generates distinct combinations traits that function well together. The maintenance adaptive trait in face gene flow depends on strength and nature acting underlying genetic loci. Floral pollination syndromes exemplify evolution for particular pollinators. North American wildflower genus Penstemon displays remarkable floral syndrome convergence, with at least 20 separate lineages have evolved from ancestral bee (wide blue-purple flowers present a landing platform bees small amounts nectar) to hummingbird (bright red narrowly tubular offering copious nectar). Related taxa differ offer an attractive opportunity examine genomic basis complex divergence. this study, we characterized divergence among 229 individuals species includes both syndromes. Field plants are easily classified into based phenotypic differences hybrids displaying intermediate rare. Despite unambiguous differences, genome-wide differentiation between is minimal. Hummingbird-adapted populations more genetically similar nearby bee-adapted than geographically distant hummingbird-adapted populations, terms dXY. However, number loci strongly differentiated species. These approximately "species-diagnostic loci," which appear nearly fixed syndromes, sprinkled throughout genome high recombination regions. Several map closely previously established quantitative (QTLs). striking difference diagnostic as whole suggests strong maintain traits, but sufficient homogenize background. A surprisingly alleles confer form identity complex.

Language: Английский

Citations

18
Weak local adaptation to drought in seedlings of a widespread conifer DOI Creative Commons
Rafael Candido‐Ribeiro, Sally N. Aitken

New Phytologist, Journal Year: 2024, Volume and Issue: 241(6), P. 2395 - 2409

Published: Jan. 21, 2024

Tree seedlings from populations native to drier regions are often assumed be more drought tolerant than those wetter provenances. However, intraspecific variation in tolerance has not been well-characterized despite being critical for developing climate change mitigation and adaptation strategies, predicting the effects of on forests. We used a large-scale common garden drought-to-death experiment assess range-wide tolerance, measured by decline photosynthetic efficiency, growth, plastic responses extreme summer 73 natural two main varieties Douglas-fir (Pseudotsuga menziesii var. glauca). Local was weak glauca nearly absent menziesii. Var. showed higher but slower growth Clinal species-wide mainly associated with temperature rather precipitation. A degree plasticity observed response drought. Genetic within is maintained primarily populations. Selective breeding may facilitate assisted gene flow.

Language: Английский

Citations

7
Natural genetic variation in dynamic photosynthesis is correlated with stomatal anatomical traits in diverse tomato species across geographical habitats DOI Creative Commons

Yugo Yoshiyama,

Yu Wakabayashi,

Kristin L. Mercer

et al.

Journal of Experimental Botany, Journal Year: 2024, Volume and Issue: 75(21), P. 6762 - 6777

Published: April 12, 2024

Abstract Plants grown under field conditions experience fluctuating light. Understanding the natural genetic variations for a similarly dynamic photosynthetic response among untapped germplasm resources, as well underlying mechanisms, may offer breeding strategies to improve production using molecular approaches. Here, we measured gas exchange light, along with stomatal density and size, in eight wild tomato species two cultivars. The induction showed significant diversity, some having faster rates than Species had higher daily integrated photosynthesis, but lower average water use efficiency because of high conductance variation was closely associated speed responses, highlighting its critical role maximizing photosynthesis light conditions. Moreover, size negatively correlated within species, plants smaller stomata at quicker those larger density. Our findings show that plays pivotal induction, proving advantageous species. interspecific rate responses could an resource optimizing

Language: Английский

Citations

7
Defining Fitness in Evolutionary Ecology DOI
Susana M. Wadgymar, Seema N. Sheth, Emily B. Josephs

et al.

International Journal of Plant Sciences, Journal Year: 2024, Volume and Issue: 185(3), P. 218 - 227

Published: Jan. 5, 2024

Language: Английский

Citations

5
The evolutionary genomics of adaptation to stress in wild rhizobium bacteria DOI Creative Commons
Hanna Kehlet-Delgado, Angeliqua P. Montoya, Kyson T. Jensen

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(13)

Published: March 20, 2024

Microbiota comprise the bulk of life’s diversity, yet we know little about how populations microbes accumulate adaptive diversity across natural landscapes. Adaptation to stressful soil conditions in plants provides seminal examples adaptation response selection via allelic substitution. For symbiotic with however, horizontal gene transfer allows for gain and loss, which could generate fundamentally different evolutionary dynamics. We use comparative genomics genetics elucidate mechanisms physiologically serpentine soils rhizobial bacteria western North American grasslands. In vitro experiments demonstrate that presence a locus major effect, nre operon, is necessary sufficient confer nickel, heavy metal enriched toxic levels soil, axis environmental chemistry variation. find discordance between inferred histories core genome nreAXY genes, often reside putative genomic islands. This suggests history this variant marked by frequent losses, and/or gains acquisition divergent rhizobium clades. However, alleles distinct nickel resistance, suggesting substitution also play role soil. These results illustrate interplay evolution loss may underlie wild microbiota. Both processes are important consider understanding improving stress-adapted microbial inocula human use.

Language: Английский

Citations

5
Conserving Evolutionary Potential: Combining Landscape Genomics with Established Methods to Inform Plant Conservation DOI

Sally N. Aitken,

Rebecca Jordan, Hayley R. Tumas

et al.

Annual Review of Plant Biology, Journal Year: 2024, Volume and Issue: 75(1), P. 707 - 736

Published: April 10, 2024

Biodiversity conservation requires conserving evolutionary potential-the capacity for wild populations to adapt. Understanding genetic diversity and dynamics is critical informing decisions that enhance adaptability persistence under environmental change. We review how emerging landscape genomic methods provide plant programs with insights into dynamics, including local adaptation its drivers. Landscape approaches explore relationships between variation environments complement rather than replace established population common garden assessing adaptive phenotypic variation, structure, gene flow, demography. Collectively, these inform actions, rescue, maladaptation prediction, assisted flow. The greatest on-the-ground impacts from such studies will be realized when practitioners are actively engaged in research monitoring. the shaping of species an uncertain future.

Language: Английский

Citations

5
Predicting species invasiveness with genomic data: Is genomic offset related to establishment probability? DOI Creative Commons
L. Camus, Mathieu Gautier, Simon Boitard

et al.

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 17(6)

Published: June 1, 2024

Abstract Predicting the risk of establishment and spread populations outside their native range represents a major challenge in evolutionary biology. Various methods have recently been developed to estimate population (mal)adaptation new environment with genomic data via so‐called Genomic Offset (GO) statistics. These approaches are particularly promising for studying invasive species but still rarely used this context. Here, we evaluated relationship between GO probability using both silico empirical data. First, designed invasion simulations evaluate ability predict two computation (Geometric Gradient Forest) under several conditions. Additionally, aimed interpretability absolute Geometric values, which theoretically represent adaptive genetic distance from distinct environments. Second, utilizing public crop pest Bactrocera tryoni , fruit fly Northern Australia, computed “source” diverse locations within invaded areas. This practical application context biological underscores its potential providing insights guiding recommendations future assessment. Overall, our results suggest that statistics good predictors may thus inform risk, although influence factors on prediction performance (e.g., propagule pressure or admixture) will need further investigation.

Language: Английский

Citations

4