Chromosomal-level genome assembly ofPopulus lasiocarpa DOI Creative Commons
Zhiqin Long, Yupeng Sang, Jiajun Feng

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: July 13, 2023

ABSTRACT Despite widespread biodiversity loss, our understanding of how species and populations will respond to accelerated climate change remains limited. In this study, we predict the evolutionary responses Populus lasiocarpa , a key alpine forest tree primarily found in mountainous regions global hotspot, change. We accomplish by generating integrating new reference genome for P. re-sequencing data 200 samples, gene expression profiles leaf root tissue following exposure heat waterlogging. Analyses indicate that demographic dynamics, divergent selection, long-term balancing selection have shaped maintained genetic variation within between over historical timescales. examining genomic signatures contemporary adaptation, haplotype blocks, characterized inversion polymorphisms suppress recombination, play crucial role clustering environmentally adaptive variations. Comparison evolved plastic show genes with plasticity generally align responses, highlighting plasticity. Lastly, incorporated local migration, load, into predictions population-level risks. Our findings reveal western populations, distributed Hengduan Mountains—a region known its environmental heterogeneity significant biodiversity—are most vulnerable should be prioritized conservation management. Overall, study advances relative roles natural immediate driving adaptation keystone species.

Language: Английский

castgen: Estimate Sample Size for Population Genomic Studies DOI
Alexander M. Sandercock

Published: April 2, 2025

Citations

0
A genome-guided strategy for climate resilience in American chestnut restoration populations DOI Creative Commons
Alexander M. Sandercock, Jared W. Westbrook, Qian Zhang

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(30)

Published: July 16, 2024

American chestnut ( Castanea dentata ) is a deciduous tree species of eastern North America that was decimated by the introduction blight fungus Cryphonectria parasitica in early 20th century. Although millions chestnuts survive as root collar sprouts, these trees rarely reproduce. Thus, considered functionally extinct. with improved resistance have been developed through interspecific hybridization followed conspecific backcrossing, and genetic engineering. Incorporating adaptive genomic diversity into backcross families transgenic lines important for restoring across broad climatic gradients. To develop sampling recommendations ex situ conservation wild variation, we coupled whole-genome resequencing 384 stump sprouts genotype–environment association analyses found range can be subdivided three seed zones characterized relatively homogeneous allele frequencies. We estimated 21 to 29 per zone will need conserved capture most extant diversity. also resequenced genomes 269 understand extent which breeding program has already captured diversity, estimate optimal reintroduction sites specific on basis their portfolio future climate projections. Taken together, results inform development an germplasm plan target blight-resistant populations environments provides blueprint developing restoration plans other imperiled species.

Language: Английский

Citations

3
Chromosomal-level genome assembly ofPopulus lasiocarpa DOI Creative Commons
Zhiqin Long, Yupeng Sang, Jiajun Feng

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: July 13, 2023

ABSTRACT Despite widespread biodiversity loss, our understanding of how species and populations will respond to accelerated climate change remains limited. In this study, we predict the evolutionary responses Populus lasiocarpa , a key alpine forest tree primarily found in mountainous regions global hotspot, change. We accomplish by generating integrating new reference genome for P. re-sequencing data 200 samples, gene expression profiles leaf root tissue following exposure heat waterlogging. Analyses indicate that demographic dynamics, divergent selection, long-term balancing selection have shaped maintained genetic variation within between over historical timescales. examining genomic signatures contemporary adaptation, haplotype blocks, characterized inversion polymorphisms suppress recombination, play crucial role clustering environmentally adaptive variations. Comparison evolved plastic show genes with plasticity generally align responses, highlighting plasticity. Lastly, incorporated local migration, load, into predictions population-level risks. Our findings reveal western populations, distributed Hengduan Mountains—a region known its environmental heterogeneity significant biodiversity—are most vulnerable should be prioritized conservation management. Overall, study advances relative roles natural immediate driving adaptation keystone species.

Language: Английский

Citations

2