Spatiotemporal Evolution of the Global Species Diversity of Rhododendron

Molecular Biology and Evolution, Journal Year: 2021, Volume and Issue: 39(1)

Published: Oct. 27, 2021

Abstract Evolutionary radiation is a widely recognized mode of species diversification, but its underlying mechanisms have not been unambiguously resolved for species-rich cosmopolitan plant genera. In particular, it remains largely unknown how biological and environmental factors jointly driven occurrence in specific regions. Here, we use Rhododendron, the largest genus woody plants Northern Hemisphere, to investigate geographic climatic factors, as well functional traits, worked together trigger evolutionary radiations shape global patterns richness based on solid phylogeny. Using 3,437 orthologous nuclear genes, reconstructed first highly supported dated backbone phylogeny Rhododendron comprising 200 that represent all subgenera, sections, nearly multispecies subsections, found most extant originated by when migrated southward from circumboreal areas tropical/subtropical mountains, showing rapid increases both net diversification rate Miocene. We also geographically uneven led much higher diversity Asia than other continents, which was mainly two variables, is, elevation range annual precipitation, were further strengthened adaptation leaf traits. Our study provides good example integrating phylogenomic ecological analyses deciphering radiations, sheds new light intensification Asian monsoon has large genera Himalaya-Hengduan Mountains.

Language: Английский

---

Evolutionary radiation of the Eurasian Pinus species under pervasive gene flow

New Phytologist, Journal Year: 2024, Volume and Issue: 242(5), P. 2353 - 2368

Published: March 21, 2024

Summary Evolutionary radiation, a pivotal aspect of macroevolution, offers valuable insights into evolutionary processes. The genus Pinus is the largest in conifers with 90% extant species emerged Miocene, which signifies case rapid diversification. Despite this remarkable history, our understanding mechanisms driving radiation within expansive has remained limited. Using exome capture sequencing and fossil‐calibrated phylogeny, we investigated divergence niche diversification, introgression among 13 closely related Eurasian spanning climate zones from tropics to boreal Arctic. We detected complex lineages subsection at all stages phylogeny. widespread gene exchange, each maintained its genetic identity showed clear differentiation. Demographic analysis unveiled distinct population histories these species, further influenced nucleotide diversity efficacy purifying positive selection species. Our findings suggest that pines was likely fueled by interspecific recombination reinforced their adaptation environments. study highlights constraints opportunities for change, expectations future response environmental changes different lineages.

Language: Английский

---

Rapid diversification of St-genome-sharing species in wheat grasses (Triticeae: Poaceae) accompanied by diversifying selection of chloroplast genes

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: Jan. 9, 2025

The St-genome-sharing taxa are highly complex group of the species with St nuclear genome and monophyletic origin in maternal lineages within Triticeae, which contains more than half polyploid that distributed a wide range ecological habitats. While high level genetic heterogeneity plastome DNA due to reticulate evolutionary event has been considered link richness taxa, relationship between dynamics diversification molecular evolution is lack understanding. Here, integrating 106 previously 12 newly sequenced plastomes representing almost all recognized genomic types genus this study applies phylogenetic reconstruction methods combination lineage analyses, estimate sequence evolution, gene expression investigate tribe. Phylogenomic analysis confirmed previous relationships, St/E/V (Pseudoroegneria/Lophopyrum + Thinopyrum/Dasypyrum) being suffered from chloroplast capture prior polyploidization events. Analyses rates detected significant acceleration approximately five million years ago taxa. Molecular tests further indicated radiation accelerated accompanied by adaptive changes few chloroplast-encoded genes directly or indirectly related photosynthesis. Our results support an important role for during diversification. In data, investigations using other genomes, such as genome, urgently needed enhance our understanding history especially determine whether well because represents inheritation angiosperms.

Language: Английский

---

Demographic history shaped geographical patterns of deleterious mutation load in a broadly distributed Pacific Salmon

PLoS Genetics, Journal Year: 2020, Volume and Issue: 16(8), P. e1008348 - e1008348

Published: Aug. 26, 2020

A thorough reconstruction of historical processes is essential for a comprehensive understanding the mechanisms shaping patterns genetic diversity. Indeed, past and current conditions influencing effective population size have important evolutionary implications efficacy selection, increased accumulation deleterious mutations, loss adaptive potential. Here, we gather extensive genome-wide data that represent extant diversity Coho salmon (Oncorhynchus kisutch) to address two objectives. We demonstrate single glacial refugium source most present-day diversity, with detectable inputs from putative secondary micro-refugium. found statistical support scenario whereby ancestral populations located south ice sheets expanded recently, swamping out other micro-refugia. Demographic inferences revealed was also affected by linked selection in large parts genome. Moreover, recent demographic history this species generated regional differences load mutations among populations, finding mirrors results human provides models expansion load. propose insights these should be better integrated conservation planning wild organisms, which currently focuses largely on neutral local adaptation, role potentially maladaptive variation being generally ignored.

Language: Английский

---

Genomic insights into adaptation to heterogeneous environments for the ancient relictual Circaeaster agrestis (Circaeasteraceae, Ranunculales)

New Phytologist, Journal Year: 2020, Volume and Issue: 228(1), P. 285 - 301

Published: May 19, 2020

Summary Investigating the interaction between environmental heterogeneity and local adaptation is critical for understanding evolutionary history of a species, providing premise studying response organisms to rapid climate change. However, most species how exactly spatial promotes population divergence genomic variations contribute adaptive evolution remain poorly understood. We examine contributions geographical variables relictual, alpine herb Circaeaster agrestis , as well genetic basis using RAD‐seq plastome data. detected significant structure with an extraordinary disequilibrium diversity among regions, signals isolation‐by‐distance along isolation‐by‐resistance. The populations were estimated begin diverging in late Miocene, possible ancestral distribution Hengduan Mountains adjacent regions. Both gradient redundancy analyses revealed association variation temperature variables. Genome–environment identified 16 putatively loci related mainly biotic abiotic stress resistance. Our genome‐wide data provide new insights into important role shaping structure, access footprints ancient relictual informing future conservation efforts.

Language: Английский

---

Ancestral polymorphisms shape the adaptive radiation ofMetrosiderosacross the Hawaiian Islands

Proceedings of the National Academy of Sciences, Journal Year: 2021, Volume and Issue: 118(37)

Published: Sept. 8, 2021

Significance Some of the most spectacular adaptive radiations plants and animals occur on remote oceanic islands, yet such are preceded by founding events that severely limit genetic variation. How genetically depauperate founder populations give rise to phenotypic ecological diversity characteristic island is not known. We generated genomic resources for Hawaiian Metrosideros ––a hyper-variable radiation woody taxa—for insights into paradox radiations. posit divergent selection differential sorting an unexpectedly rich pool ancestral variation drove diversification lineages. Recurring use ancient variants from a richer-than-expected gene may explain how lineages can diversify fill countless niches islands.

Language: Английский

---

Macroevolutionary Analyses Provide New Evidence of Phasmid Wings Evolution as a Reversible Process

Systematic Biology, Journal Year: 2022, Volume and Issue: 71(6), P. 1471 - 1486

Published: June 11, 2022

Abstract The concept that complex ancestral traits can never be recovered after their loss is still widely accepted, despite phylogenetic and molecular approaches suggest instances where phenotypes may have been lost throughout the evolutionary history of a clade subsequently reverted back in derived lineages. One first most notable examples such process wing evolution phasmids; this polyneopteran order insects, which comprises stick leaf has played central role initiating long-standing debate on topic. In study, novel comprehensive time tree including over 300 Phasmatodea species used as framework for investigating patterns clade. Despite accounting several possible biases sources uncertainty, macroevolutionary analyses consistently revealed multiple reversals to winged states taking place loss, reversibility coupled with higher diversification rates. Our findings support or reduction wings occurred lineage leading extant phasmid recent common ancestor, brachyptery inferred an unstable state unless co-opted nonaerodynamic adaptations. We also explored how different assumptions probability could impact inference: we found until are assumed 30 times more unlikely than losses, they uncertainty model parameters. demonstrate reversible dynamic phasmids contribute our understanding trait evolution. [Dollo’s law; Phasmatodea; comparative methods; polyneoptera; reversals; wing.]

Language: Английский

---

Novel Tri-Segmented Rhabdoviruses: A Data Mining Expedition Unveils the Cryptic Diversity of Cytorhabdoviruses

Viruses, Journal Year: 2023, Volume and Issue: 15(12), P. 2402 - 2402

Published: Dec. 10, 2023

Cytorhabdoviruses (genus Cytorhabdovirus, family Rhabdoviridae) are plant-infecting viruses with enveloped, bacilliform virions. Established members of the genus Cytorhabdovirus have unsegmented single-stranded negative-sense RNA genomes (ca. 10–16 kb) which encode four to ten proteins. Here, by exploring large publicly available metatranscriptomics datasets, we report identification and genomic characterization 93 novel genetic evolutionary cues cytorhabdoviruses. Strikingly, five unprecedented tri-segmented were also identified. This finding represents first in Rhabdoviridae, they should be classified a within this for suggest name “Trirhavirus”. Interestingly, nucleocapsid polymerase only typical rhabdoviral proteins encoded those viruses, whereas three them, protein similar emaravirus (family Fimoviridae) silencing suppressor was found, while other predicted had no matches any sequence databases. Genetic distance insights that all these may represent species. Phylogenetic analyses, both previously plant rhabdoviruses, provide compelling support division into distinct genera. proposed reclassification not enhances our understanding dynamics group rhabdoviruses but illuminates remarkable diversity encompass. study significant expansion genomics cytorhabdoviruses will enable future research on peculiarity shows plasticity rhabdovirus genome organization discovery unique trajectory.

Language: Английский

---

Evolutionary Repair Experiments as a Window to the Molecular Diversity of Life

Current Biology, Journal Year: 2020, Volume and Issue: 30(10), P. R565 - R574

Published: May 1, 2020

Language: Английский

---

Mesosulfuron-methyl influenced biodegradability potential and N transformation of soil

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 416, P. 125770 - 125770

Published: March 30, 2021

Language: Английский

---