Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia
Introduction and objectives: The members of the genus Pilosella are native in Europe and Asia, but they are successful invasive species on most continents. These species form an agamic complex with common apomixis. Apomictic species hybridize, they have different degree of residual sexuality. Main a...
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Sociedad Argentina de Botánica
2021
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/32767 |
| Aporte de: |
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I10-R10-article-32767 |
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ojs |
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Universidad Nacional de Córdoba |
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I-10 |
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R-10 |
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Revistas de la UNC |
| language |
Inglés |
| format |
Artículo revista |
| topic |
Aneuploidy alien plants clonal diversity cytotypes facultative apomixis hybridization Patagonia Pilosella plant invasion polyploidy South America América del Sur aneuploidía apomixis facultativa citotipos diversidad clona hibridación invasión de plantas Patagonia Pilosella plantas invasoras poliploidía |
| spellingShingle |
Aneuploidy alien plants clonal diversity cytotypes facultative apomixis hybridization Patagonia Pilosella plant invasion polyploidy South America América del Sur aneuploidía apomixis facultativa citotipos diversidad clona hibridación invasión de plantas Patagonia Pilosella plantas invasoras poliploidía Krahulcová, Anna Krahulec, František Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| topic_facet |
Aneuploidy alien plants clonal diversity cytotypes facultative apomixis hybridization Patagonia Pilosella plant invasion polyploidy South America América del Sur aneuploidía apomixis facultativa citotipos diversidad clona hibridación invasión de plantas Patagonia Pilosella plantas invasoras poliploidía |
| author |
Krahulcová, Anna Krahulec, František |
| author_facet |
Krahulcová, Anna Krahulec, František |
| author_sort |
Krahulcová, Anna |
| title |
Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| title_short |
Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| title_full |
Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| title_fullStr |
Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| title_full_unstemmed |
Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia |
| title_sort |
cytotype variation and clonal diversity in polyploid apomictic populations of pilosella (compositeae, cichorieae) introduced to southern patagonia |
| description |
Introduction and objectives: The members of the genus Pilosella are native in Europe and Asia, but they are successful invasive species on most continents. These species form an agamic complex with common apomixis. Apomictic species hybridize, they have different degree of residual sexuality. Main aim of this paper was to determine if the interspecific hybridization already occurred in Patagonia.
M&M: This study is based on analysis of seed progeny collected at thirteen populations of Pilosella in southern Argentina and Chile. The plants were examined for their taxonomic identity, DNA ploidy level (using flow cytometry), chromosome number, reproduction, formation of parthenogenetic seeds and clonal identity (using isozyme phenotypes).
Results: No mixed-species population was recorded. Two apomictic clones of P. officinarum (one pentaploid and the other hexaploid) were found in populations: eight were hexaploid and one was mixed in cytotype composition. A new species for Patagonia, the apomictic pentaploid P. caespitosa, was represented by plants from two populations in Argentina. Some of the progeny plants cultivated from seeds sampled at three localities represented seed-fertile aneuploids the morphology of which implied a hybrid origin and indicated P. officinarum as one of the parents.
Conclusions: The presence of seed-fertile, aneuploid and parthenogenetic hybrids among the cultivated plants signifies an increased risk of the formation of new hybridogeneous genotypes of Pilosella in southern Patagonia. |
| publisher |
Sociedad Argentina de Botánica |
| publishDate |
2021 |
| url |
https://revistas.unc.edu.ar/index.php/BSAB/article/view/32767 |
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AT krahulcovaanna cytotypevariationandclonaldiversityinpolyploidapomicticpopulationsofpilosellacompositeaecichorieaeintroducedtosouthernpatagonia AT krahulecfrantisek cytotypevariationandclonaldiversityinpolyploidapomicticpopulationsofpilosellacompositeaecichorieaeintroducedtosouthernpatagonia AT krahulcovaanna variacioncitotipicaydiversidadclonalenpoblacionespoliploidesyapomicticasdepilosellacompositaecichorieaeintroducidasenelsurdelapatagonia AT krahulecfrantisek variacioncitotipicaydiversidadclonalenpoblacionespoliploidesyapomicticasdepilosellacompositaecichorieaeintroducidasenelsurdelapatagonia |
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I10-R10-article-327672021-11-04T14:07:35Z Cytotype variation and clonal diversity in polyploid apomictic populations of Pilosella (Compositeae, Cichorieae) introduced to southern Patagonia Variación citotípica y diversidad clonal en poblaciones poliploides y apomícticas de Pilosella (Compositae, Cichorieae) introducidas en el sur de la Patagonia Krahulcová, Anna Krahulec, František Aneuploidy alien plants clonal diversity cytotypes facultative apomixis hybridization Patagonia Pilosella plant invasion polyploidy South America América del Sur aneuploidía apomixis facultativa citotipos diversidad clona hibridación invasión de plantas Patagonia Pilosella plantas invasoras poliploidía Introduction and objectives: The members of the genus Pilosella are native in Europe and Asia, but they are successful invasive species on most continents. These species form an agamic complex with common apomixis. Apomictic species hybridize, they have different degree of residual sexuality. Main aim of this paper was to determine if the interspecific hybridization already occurred in Patagonia. M&M: This study is based on analysis of seed progeny collected at thirteen populations of Pilosella in southern Argentina and Chile. The plants were examined for their taxonomic identity, DNA ploidy level (using flow cytometry), chromosome number, reproduction, formation of parthenogenetic seeds and clonal identity (using isozyme phenotypes). Results: No mixed-species population was recorded. Two apomictic clones of P. officinarum (one pentaploid and the other hexaploid) were found in populations: eight were hexaploid and one was mixed in cytotype composition. A new species for Patagonia, the apomictic pentaploid P. caespitosa, was represented by plants from two populations in Argentina. Some of the progeny plants cultivated from seeds sampled at three localities represented seed-fertile aneuploids the morphology of which implied a hybrid origin and indicated P. officinarum as one of the parents. Conclusions: The presence of seed-fertile, aneuploid and parthenogenetic hybrids among the cultivated plants signifies an increased risk of the formation of new hybridogeneous genotypes of Pilosella in southern Patagonia. Introducción y objetivos: El género Pilosella es nativo de Europa y Asia, pero sus especies son plantas invasoras exitosas en la mayoría de continentes. Éstas especies forman un complejo agámico en el que la apomixis es común. Las especies apomícticas hibridan y presentan diferentes grados de sexualidad residual. El principal objetivo de este trabajo fue determinar la existencia de hibridación interespecífica en poblaciones del sur de la Patagonia. M&M: Este estudio está basado en el análisis de la descendencia de semillas de Pilosella recolectadas en trece poblaciones del Sur de Argentina y Chile. Las plantas fueron examinadas para determinar su identidad taxonómica, el nivel de ploidía de su ADN (empleando citometría de flujo), el número de cromosomas, el tipo de reproducción, la formación de semillas partenogenéticas y su identidad clonal (caracterizando fenotipos isoenzimáticos). Resultados: No se registró ninguna población mixta entre especies. Dos clones apomícticos de P. officinarum (uno pentaploide y otro hexaploide) fueron encontrados en varias poblaciones: ocho de ellas fueron determinadas como hexaploides; mientras que una presentó ambos citotipos. La presencia de la especie apomíctica y pentaploide P. caespitosa en dos poblaciones de Argentina supone el primer registro de esta especie en la Patagonia. Algunas semillas muestreadas en tres localidades mostraron una descendencia aneuploide fértil, cuya morfología indicó un origen híbrido con P. officinarum como una de las especies parentales. Conclusiones: La presencia de híbridos partenogenéticos, aneuploides y con semillas fértiles entre las plantas cultivadas, implica un aumento del riesgo de formación de nuevos genotipos híbridos de Pilosella en el sur de la Patagonia. Sociedad Argentina de Botánica 2021-09-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/32767 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 56 No. 3 (2021): September Boletín de la Sociedad Argentina de Botánica; Vol. 56 Núm. 3 (2021): Septiembre Boletín de la Sociedad Argentina de Botánica; v. 56 n. 3 (2021): Septiembre 1851-2372 0373-580X 10.31055/1851.2372.v56.n3 eng https://revistas.unc.edu.ar/index.php/BSAB/article/view/32767/35243 https://revistas.unc.edu.ar/index.php/BSAB/article/view/32767/35244 Derechos de autor 2021 Anna Krahulcová, František Krahulec https://creativecommons.org/licenses/by-nc-nd/4.0 |