000171645 001__ 171645
000171645 005__ 20260527123126.0
000171645 0247_ $$2doi$$a10.1016/j.ympev.2026.108603
000171645 0248_ $$2sideral$$a149362
000171645 037__ $$aART-2026-149362
000171645 041__ $$aeng
000171645 100__ $$aGarcía-Moro, Pablo
000171645 245__ $$aUncovering ancient allopolyploidy through genomic evidence: A case study in Carex subgenus Uncinia
000171645 260__ $$c2026
000171645 5060_ $$aAccess copy available to the general public$$fUnrestricted
000171645 5203_ $$aThe signature of allopolyploidy becomes increasingly blurred through time, hindering evaluation of its evolutionary role, and ancient hybridization remains difficult to detect even with large-scale genomic data. Understanding these processes is critical for reconstructing plant diversification at deep time scales. We focus on the enigmatic Carex subg. Uncinia (Cyperaceae), which shows unusual genomic and morphological traits and whose phylogenetic placement has long been controversial. To address this, we combined phylogenomic reconstruction with genome size estimates, allele divergence and locus heterozygosity analyses, and ploidy-level inference, together with phylogenetic network approaches. Our framework explicitly integrates allele-aware analyses that are often overlooked in plant phylogenomics. We find that genome size in Uncinia is approximately threefold larger than in other Carex lineages, consistent with an ancient polyploidy event. Phylogenetic networks further suggest that subg. Uncinia was originated through a hybridization event between subgenera Euthyceras and Vignea during the Early Miocene. This signal is reinforced by allele phasing and paralog analyses, with Uncinia gene copies clustering with different parental clades and phased alleles frequently segregating into opposite lineages. These complementary approaches reveal that Uncinia originated through ancient hybridization and allopolyploidy, and that its conflicting placement in previous studies reflects a reticulate evolutionary history. More broadly, our study highlights the power of combining genome size, network analyses, and allele phasing to uncover hidden reticulate processes in plants and emphasizes the importance of explicitly accounting for such processes when investigating diversification in complex evolutionary lineages.
000171645 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttps://creativecommons.org/licenses/by-nc/4.0/deed.es
000171645 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000171645 700__ $$aJung, Se-Eun
000171645 700__ $$aValdés-Florido, Ana
000171645 700__ $$aMorel, Jérémie
000171645 700__ $$aSanz-Arnal, María
000171645 700__ $$aVillaverde, Tamara
000171645 700__ $$aNaczi, Robert F.C.
000171645 700__ $$aFord, Kerry
000171645 700__ $$aKim, Sangtae
000171645 700__ $$aMartín-Bravo, Santiago
000171645 700__ $$aJiménez-Mejías, Pedro
000171645 700__ $$0(orcid)0000-0001-5658-8411$$aViruel, Juan$$uUniversidad de Zaragoza
000171645 700__ $$aMárquez-Corro, José Ignacio
000171645 7102_ $$15011$$2063$$aUniversidad de Zaragoza$$bDpto. CC.Agrar.y Medio Natural$$cÁrea Botánica
000171645 773__ $$g220 (2026), 108603 [14 pp.]$$pMol. phylogenet. evol.$$tMOLECULAR PHYLOGENETICS AND EVOLUTION$$x1055-7903
000171645 8564_ $$s4971404$$uhttps://zaguan.unizar.es/record/171645/files/texto_completo.pdf$$yVersión publicada
000171645 8564_ $$s2486671$$uhttps://zaguan.unizar.es/record/171645/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000171645 909CO $$ooai:zaguan.unizar.es:171645$$particulos$$pdriver
000171645 951__ $$a2026-05-27-11:25:40
000171645 980__ $$aARTICLE