Phylogenomics shed light on the complex evolutionary history of a gymnosperm genus showing East Asian–Tethyan disjunction

Journal of Systematics and Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Abstract When and how disjunct distributions of biological taxa arose has long attracted interest in biogeography, yet the East Asian–Tethyan disjunction is understudied. Cupressus (Cupressaceae) shows this disjunction, with 10 species Asia three Mediterranean region. Here we used target‐capture sequencing obtained 1991 single‐copy nuclear genes, plus complete plastomes, to infer evolutionary history . Our phylogenomic reconstruction resolved four well supported clades , but revealed significant phylogenetic conflicts, inter‐lineage gene flow, incomplete lineage sorting tree estimation error all making important contributions. The Chengiana clade most likely originated by hybridization between ancestors Himalayan–Hengduan Mountains subtropical clades, whereas orogenic climatic changes may have facilitated flow within clade. Molecular dating suggested that recent common ancestor appeared around middle Eocene period then became continuously distributed across Eurasia. when diverged, been driven Eocene/Oligocene declines global temperature, reinforced ecogeographic barrier created uplift Qinghai–Tibet Plateau. Niche shifts clade, signatures selection genes for drought salt tolerance, probably indicate adaptation local conditions. Overall, our study in‐depth analyses are powerful tools deciphering complex origin organisms, especially gymnosperms.

Language: Английский

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Chloroplast Genome Evolution of Hamamelidaceae at Subfamily Level

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(4)

Published: March 27, 2025

ABSTRACT The Hamamelidaceae is significant for its contributions to construction, furniture making, and ornamental use, including 26 genera 119 species. However, complete chloroplast genome sequences of species have been reported less frequently. In this study, five were newly sequenced, seven others available genomes added compare the evolution in at subfamily level. results indicated that size ranged from 158,116 159,941 bp, encoding 79 81 protein‐coding genes, four ribosomal RNA 30 31 transfer genes. A robust phylogenetic tree was obtained using genomes, supporting all formed a monophyletic group divided into subfamilies. Exbucklandioideae first diverged within Hamamelidaceae, followed by Mytilarioideae, Disanthoideae, Hamamelidoideae, which clade. Furthermore, three new potential DNA barcodes provided: trnH‐psbA , psbJ‐petA ycf1 . This study confirms data provide more accurate confident resolution relationships Hamamelidaceae. These genomic not only enhance understanding but also better

Language: Английский

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Evolutionary divergence contributes to species richness anomalies among intercontinental disjunct regions of ash species (Fraxinus, Oleaceae)

Journal of Systematics and Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Species are distributed heterogeneously, and different regions have contrasting numbers of species, producing species richness anomalies. More than 100 angiosperm genera demonstrate disjunct distributions in at least two these regions: Europe, eastern North America, western East Asia, commonly between Asia America. These similar climates but usually exhibit anomalies; however, the underlying causes anomalies intercontinental remain poorly understood. In this study, we investigated drivers ash tree (genus Fraxinus L.) among based on distribution data, macrofossil records, corresponding evolutionary environmental variables. Generalized linear regression pathway model analyses incorporating processes indicated that global cooling has contributed to low whereas divergence, shaped distinct patterns (which was identified as an cradle) America museum). Environmental heterogenies divergence resulted a significant diversity anomaly regions. This study emphasizes important role evolution formation patterns.

Language: Английский

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Key innovations and niche variation promoted rapid diversification of the widespread Juniperus (Cupressaceae)

Communications Biology, Journal Year: 2024, Volume and Issue: 7(1)

Published: Aug. 16, 2024

The processes of forming lineages undergoing widespread radiations remain a knowledge gap that is fundamental to our understanding the geographic distributions species. Although early studies emphasized importance dispersal ability and historical migration events, key innovations promote rapid diversification and/or adaptation new habitats may also strongly influence distribution ranges. Juniperus second largest genus conifers widely distributed throughout Northern Hemisphere. Here, we used phylogenetic, phenotypic, climatic data investigate contributions these wide Juniperus. Combining time-scaled phylogeny macroevolutionary theory, show berry-like seed cones dioecy promoted increased allopatric speciation. Ecological niches had significant divergence among different clades Biogeographic results supported multiple long-distance events niche variation contributed modern range Juniperus, while both phenotypic ecological opportunity probably drove its range. Our findings suggest current likely result driven by in which opportunities from innovation divergence. Using macroevolution method, this study shows

Language: Английский

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Comparative chloroplast genome analyses provide new insights into molecular markers for distinguishing Arnebiae Radix and its substitutes (tribe Lithospermeae, Boraginaceae)

Phytomedicine, Journal Year: 2024, Volume and Issue: 136, P. 156338 - 156338

Published: Dec. 20, 2024

Language: Английский

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