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Abstract Detail

Hybrids and Hybridization

Köhler, Matias [1], Oakley, Luis J. [2], Font, Fabián [3], Las Peñas, M. Laura [4], Majure, Lucas C. [5].

On the continuum of evolution: a putative hybrid speciation event in Opuntia (Cactaceae) between alien and native species in southern South America.

Hybridization plays a fundamental role in plant evolution and diversification, promoting gene flow, morphological novelties, and plant speciation. Here, we integrated fieldwork, collections-based research, morphological observations, molecular systematics, and cytogenetic data to investigate the identity of a previously unidentified taxon of Opuntia (the prickly pear cacti) observed in the northeast region of Argentina. Our analyses revealed a cytonuclear phylogenetic discordance among nuclear and plastid genomes, as well as a polyploid feature of the studied taxon. Combining our analyses with morphological observations, we suggest that hybridization events between Opuntia rioplatensis and O. ficus-indica, may have produced the taxon here investigated. Opuntia is the most widespread genus of Cactaceae, and many species have been introduced worldwide for an array of different purposes. Our report proposes the first hybridization event of a North American species with a southern South American species, which may shed new light on future evolutionary scenarios and speciation within the group.

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1 - Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Botânica, Porto Alegre, RS, Brazil
2 - Cátedra de Botánica, Facultad de Ciencias Agrarias, Universidad Naci, Zavalla, Santa Fe, Argentina
3 - Herbario Museo de Farmacobotánica "Juan A. Domínguez" (BAF), Fac, Buenos Aires, Buenos Aires, Argentina
4 - Instituto Multidisciplinario de Biología Vegetal (IMBIV), Facultas de, Córdoba, Argentina
5 - University of Florida Herbarium (FLAS), Florida Museum of Natural Hist, Gainesville, FL, USA

Molecular Systematics

Presentation Type: Oral Paper
Session: HH1, Hybrids and Hybridization I
Location: /
Date: Wednesday, July 21st, 2021
Time: 11:15 AM(EDT)
Number: HH1006
Abstract ID:955
Candidate for Awards:None

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