Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae)
Background: Senecio is the largest genus in the Asteraceae family growing in all environments around the world. It displays taxonomic and systematical difficulties. Cytogenetic knowledge of this genus is ancient, scarce and mainly restricted to chromosome number records. Results: In this study we a...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Springer Open
2019
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| Materias: | |
| Acceso en línea: | https://as-botanicalstudies.springeropen.com/articles/10.1186/1999-3110-54-20 http://hdl.handle.net/20.500.12123/4270 https://doi.org/10.1186/1999-3110-54-20 |
| _version_ | 1855483399825784832 |
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| author | Lopez, Mariana Gabriela Xifreda, Cecilia Carmen Poggio, Lidia Wulff, Arturo Federico |
| author_browse | Lopez, Mariana Gabriela Poggio, Lidia Wulff, Arturo Federico Xifreda, Cecilia Carmen |
| author_facet | Lopez, Mariana Gabriela Xifreda, Cecilia Carmen Poggio, Lidia Wulff, Arturo Federico |
| author_sort | Lopez, Mariana Gabriela |
| collection | INTA Digital |
| description | Background: Senecio is the largest genus in the Asteraceae family growing in all environments around the world. It displays taxonomic and systematical difficulties. Cytogenetic knowledge of this genus is ancient, scarce and mainly restricted to chromosome number records.
Results: In this study we analyzed chromosome number, meiotic configuration, bivalent morphology, meiotic behavior and pollen grain stainability on 100 accessions of 27 different polyploid Senecio L. sect Senecio entities. Median, standard deviation and mode were calculated for number and position of chiasmata and meiotic recombination was statistically evaluated. Although high frequency of multivalents and associated meiotic irregularities are expected in high polyploids, bivalents predominance and, consequently, regular meiosis were observed, with normal sporogenesis and high pollen grain stainability.
Conclusion: Depletion in the total chiasmata was significant only in some species but the terminal position was preferential in all the entities analyzed, indicating significant reduction in recombination. The regular meiosis observed suggest that intra and intergenomic reorganization process occur quickly and efficiently in this genus. Mechanisms of diploidization, common to all polyploids, are reinforced by the strong reduction in crossing-over rushing polyploids stabilization. |
| format | Artículo |
| id | INTA4270 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Springer Open |
| publisherStr | Springer Open |
| record_format | dspace |
| spelling | INTA42702019-01-15T15:42:02Z Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) Lopez, Mariana Gabriela Xifreda, Cecilia Carmen Poggio, Lidia Wulff, Arturo Federico Senecio Citogenética Meiosis Cromosomas Genética Poliploidia Asteraceae Cytogenetics Chromosomes Genetics Polyploidy Background: Senecio is the largest genus in the Asteraceae family growing in all environments around the world. It displays taxonomic and systematical difficulties. Cytogenetic knowledge of this genus is ancient, scarce and mainly restricted to chromosome number records. Results: In this study we analyzed chromosome number, meiotic configuration, bivalent morphology, meiotic behavior and pollen grain stainability on 100 accessions of 27 different polyploid Senecio L. sect Senecio entities. Median, standard deviation and mode were calculated for number and position of chiasmata and meiotic recombination was statistically evaluated. Although high frequency of multivalents and associated meiotic irregularities are expected in high polyploids, bivalents predominance and, consequently, regular meiosis were observed, with normal sporogenesis and high pollen grain stainability. Conclusion: Depletion in the total chiasmata was significant only in some species but the terminal position was preferential in all the entities analyzed, indicating significant reduction in recombination. The regular meiosis observed suggest that intra and intergenomic reorganization process occur quickly and efficiently in this genus. Mechanisms of diploidization, common to all polyploids, are reinforced by the strong reduction in crossing-over rushing polyploids stabilization. Instituto de Biotecnología Fil: Lopez, Mariana Gabriela. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina Fil: Xifreda, Cecilia Carmen. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Etnobotánica y Botánica Aplicada; Argentina Fil: Poggio, Lidia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Wulff, Arturo Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución. Laboratorio de Citogenética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2019-01-15T15:40:53Z 2019-01-15T15:40:53Z 2013-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://as-botanicalstudies.springeropen.com/articles/10.1186/1999-3110-54-20 http://hdl.handle.net/20.500.12123/4270 1817-406X 1999-3110 https://doi.org/10.1186/1999-3110-54-20 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Springer Open Botanical Studies 54 : 20 (2013) |
| spellingShingle | Senecio Citogenética Meiosis Cromosomas Genética Poliploidia Asteraceae Cytogenetics Chromosomes Genetics Polyploidy Lopez, Mariana Gabriela Xifreda, Cecilia Carmen Poggio, Lidia Wulff, Arturo Federico Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title | Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title_full | Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title_fullStr | Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title_full_unstemmed | Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title_short | Deep cytogenetics analysis reveals meiotic recombination depletion in species of Senecio (Asteraceae) |
| title_sort | deep cytogenetics analysis reveals meiotic recombination depletion in species of senecio asteraceae |
| topic | Senecio Citogenética Meiosis Cromosomas Genética Poliploidia Asteraceae Cytogenetics Chromosomes Genetics Polyploidy |
| url | https://as-botanicalstudies.springeropen.com/articles/10.1186/1999-3110-54-20 http://hdl.handle.net/20.500.12123/4270 https://doi.org/10.1186/1999-3110-54-20 |
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