Genomics‐Driven Monitoring of Fraxinus latifolia (Oregon Ash) to Inform Conservation and EAB‐Resistance Breeding

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Understanding the evolutionary processes underlying range-wide genomic variation is critical to designing effective conservation and restoration strategies. Evaluating influence of connectivity, demographic change environmental adaptation for threatened species can be invaluable proactive potential. In this study, we assessed across range Fraxinus latifolia, a foundational riparian tree native western North America recently exposed invasive emerald ash borer (Agrilus planipennis; EAB). Over 1000 individuals from 61 populations were sequenced using reduced representation (ddRAD-seq) species' range. Strong population structure was evident along latitudinal gradient, with connectivity largely maintained central valley river systems, centre genetic diversity coinciding major systems Despite evidence estimates nucleotide size low all populations, suggesting patchy distribution F. latifolia may impact its long-term Range-wide offset, which indicate required adjust future climate projections, greatest in eastern lowest southern portions range, regional potential longer-term. To preserve capacity needed development breeding programmes, prioritising will provide foundation management.

Language: Английский

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Tree population genomics

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 325 - 356

Published: Jan. 1, 2025

Language: Английский

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Geography and Environment Shape Spatial Genetic Variation and Predict Climate Maladaptation Across Isolated and Disjunct Populations of Pinus muricata

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

ABSTRACT Assessing the evolutionary potential of rare species with limited migration amidst ongoing climate change requires an understanding patterns genetic variation and local adaptation. In contrast to large distributions population sizes most pines, Pinus muricata (bishop pine) occurs in a few isolated populations along coastal western North America is listed as threatened by IUCN. To quantify how current influenced distribution environment, we generated reduced representation DNA sequencing data for extant P. (12 locations, 7828 loci). We assessed geographic differentiation diversity used genetic‐environment association (GEA) analyses characterise contribution environmental variables adaptation structure. Based on these inferences, quantified genomic offset relative estimate maladaptation under mild (SSP1‐2.6) severe (SSP5‐8.5) scenarios across 2041–2060 2081–2100. Despite occurring small, populations, was not low . Population was, however, defined hierarchy spatial scales, stands generally forming genetically identifiable groups latitude environments. GEA implicated temperature‐ soil‐related strongly contributing Estimates future varied non‐linearly latitude, increased severity projections over time, were predicted increases annual temperature. Our results suggest that isolation have shaped among disjunct factors may shape risk projected change.

Language: Английский

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Genomic Vulnerability of a Sentinel Mammal Under Climate Change

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

ABSTRACT Climate change poses a significant threat to biodiversity, particularly in alpine ecosystems where species have already undergone elevational range shifts. Genomics can be used estimate the adaptive potential of species, as well shift genomic composition necessary for populations adjust climate (e.g., offset). Here, we investigated patterns climate‐mediated genetic variation and predicted degree offset under multiple scenarios sentinel mammal, American pika ( Ochotona princeps ). We collected genome‐wide data (29,709 SNPs) from 363 individuals spanning entire western North America employed genotype‐environment association analyses identify 924 robust outlier SNPs, several which were linked genes previously associated with high elevation hypoxia responses various (Ochotonidae). Adaptive was most strongly influenced by mean warmest month temperature, followed precipitation coldest quarter. Spatial heterogeneous, significantly levels variation, latitude. Sites within Northern Rocky Mountains exhibited highest projected despite possessing variation. As such, while our study provides an example how explore consequences change, it further highlights need careful consideration values their proper ecological context.

Language: Английский

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Maladaptation in cereal crop landraces following a soot-producing climate catastrophe

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: May 8, 2025

Aerosol-producing catastrophes like nuclear war or asteroid strikes, though rare, pose serious risks to human survival. The injected aerosols would reduce solar radiation, lower temperatures, and alter precipitation, impacting crop productivity, including for locally adapted traditional varieties, i.e. landraces. We assess post-catastrophic climate effects on crops with extensive landrace cultivation, barley, maize, rice, sorghum, under scenarios that differ in the quantity of soot injection. Using a growth model, we estimate environmental stress gradients together genomic markers apply gradient forest offset methods predict maladaptation landraces over time. find are most maladapted where soot-induced shifts were strongest. Validating our approach, models successfully capture signal maize adaptation common gardens across Mexico. further use identify varieties best matched specific conditions, indicating potential substitutions agricultural resilience. substituted require long migration distances, often country borders, countries more climatic diversity have better within-country substitutions. Our findings highlight soot-producing catastrophe drive global suggest current adaptive is insufficient

Language: Английский

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