Neonative diploid-polyploid hotspots of Paspalum notatum: identifying novel genetic diversity for conservation in South America.

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dc.contributorLUCAS M. ESCOBAR, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM); ANNA VERENA REUTEMANN, UNIVERSIDAD NACIONAL DEL NORDESTE (FCA-UNNE); MARÍA C. PERICHON, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM); JUAN S. SCHNEIDER, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM); CAROLINA A. SARTOR, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM); CLARISSE CHAPARRO, UNIVERSIDAD NACIONAL DE ASUNCIÓN; JULIO R. DAVIÑA, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM); JOSE FRANCISCO MONTENEGRO VALLS, CENARGEN; ERIC J. MARTÍNEZ, UNIVERSIDAD NACIONAL DEL NORDESTE (FCA-UNNE); ANA I. HONFI, UNIVERSIDAD NACIONAL DE MISIONES (FCEQYN-UNAM).
dc.creatorESCOBAR, L. M.
dc.creatorREUTEMANN, A. V.
dc.creatorPERICHON, M. C.
dc.creatorSCHNEIDER, J. S.
dc.creatorSARTOR, C. A.
dc.creatorCHAPARRO, C.
dc.creatorDAVIÑA, J. R.
dc.creatorVALLS, J. F. M.
dc.creatorMARTÍNEZ, E. J.
dc.creatorHONFI, A. I.
dc.date2025-09-25T11:48:45Z
dc.date2025-09-25T11:48:45Z
dc.date2025-09-25
dc.date2025
dc.date.accessioned2026-07-07T11:56:39Z
dc.descriptionBackground: Bahiagrass (Paspalum notatum), a key cultivated grass worldwide, includes both sexual diploid and apomictic tetraploid cytotypes. Finding new diploid populations is crucial for the species’ genetic improvement and conservation. Objectives: We aimed to determine the ploidy levels of 168 P. notatum accessions from subtropical South America, analyze the geographic distribution of cytotype diversity, and identify new diploid zones. Methods: Using chromosome counts and flow cytometry, we georeferenced our data with existing literature to map cytotype distribution. Results: We discovered five previously unknown diploid centers in Argentina, Brazil, and Paraguay, two of which resulted from the naturalization of diploid cultivars. One location hosted a mixed-ploidy population (diploid, tetraploid, and pentaploid), confirming ongoing hybridization. Our results show that human activity actively creates new centers of genetic diversity, serving as a dynamic source of raw material for crop resilience. These neonative diversification zones are not only of scientific interest but also vital, evolving hotspots for germplasm conservation. Conclusions: This study presents a new framework for understanding the interactions between crop and wild relatives and highlights the urgent need for conservation in the rapidly changing South American grasslands.
dc.identifierGenes, v. 16, n. 9, 1098, 2025.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1179089
dc.identifierhttps://doi.org/10.3390/genes16091098
dc.identifier.urihttp://hdl.handle.net/123456789/518430
dc.languageeng
dc.rightsopenAccess
dc.subjectCytotype diversity
dc.subjectNeopolyploidization
dc.subjectWild-cultivated plant hybrids
dc.subjectCytotype foci conservation
dc.subjectChromosome number
dc.titleNeonative diploid-polyploid hotspots of Paspalum notatum: identifying novel genetic diversity for conservation in South America.
dc.typeArtigo de periódico

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