Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America
Mimosa subseries Dolentes Barneby and Brevipedes Barneby are ecologically and morphologically high-diversified infrageneric taxa of this genus in southern South America. We performed a cytogenetical and morphological analysis of both subseries. Chromosome numbers from accessions throughout the area...
| Autores principales: | , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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CSIRO Publishing
2019
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| Materias: | |
| Acceso en línea: | https://bioone.org/journals/Australian-Systematic-Botany/volume-31/issue-2/SB16033/Cytogeography-and-morphological-characterisation-of-a-taxonomic-polyploid-complex-of/10.1071/SB16033.short http://hdl.handle.net/20.500.12123/5530 https://doi.org/10.1071/SB16033 |
| _version_ | 1855035514082557952 |
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| author | Morales, Matias Fradkin, Eduardo Bessega, Cecilia Fabiana Poggio, Lidia Fortunato, Renee Hersilia |
| author_browse | Bessega, Cecilia Fabiana Fortunato, Renee Hersilia Fradkin, Eduardo Morales, Matias Poggio, Lidia |
| author_facet | Morales, Matias Fradkin, Eduardo Bessega, Cecilia Fabiana Poggio, Lidia Fortunato, Renee Hersilia |
| author_sort | Morales, Matias |
| collection | INTA Digital |
| description | Mimosa subseries Dolentes Barneby and Brevipedes Barneby are ecologically and morphologically high-diversified infrageneric taxa of this genus in southern South America. We performed a cytogenetical and morphological analysis of both subseries. Chromosome numbers from accessions throughout the area of distribution were studied. The chromosome numbers 2n = 8x = 104 for M. dolens subsp. callosa (Benth.) Barneby, M. dolens subsp. acerba varieties acerba (Benth.) Barneby, latifolia (Benth.) Barneby and rudis (Benth.) Barneby, M. dolens subsp. rigida var. rigescens (Benth.) Barneby, var. anisitsii (Lindm.) Barneby and var. foliolosa (Benth.) Barneby; and 2n = 4x = 52 for M. sceptrum Barneby, M. aff. custodis Barneby and M. dolens var. pangloea Barneby are presented for the first time. Their karyotypes were symmetric, with small chromosomes. There were several areas with taxa growing in sympatry, occasionally with intermediate forms. No diploids were found, which suggests the presence of either a declining polyploid complex or ancient polyploidy in the clade of southernmost representatives of M. series Mimosa, the most derived of the genus. Some vegetative, inflorescence and carpological characters seem to be associated with chromosome duplication. The distribution pattern of the cytotypes suggests events of chromosome duplication in centres of diversity and expansion of octoploids to the southernmost areas of distribution. Our findings support the importance of polyploidy in the morphological diversity, distribution and speciation of this complex. |
| format | info:ar-repo/semantics/artículo |
| id | INTA5530 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | CSIRO Publishing |
| publisherStr | CSIRO Publishing |
| record_format | dspace |
| spelling | INTA55302019-07-18T17:07:24Z Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America Morales, Matias Fradkin, Eduardo Bessega, Cecilia Fabiana Poggio, Lidia Fortunato, Renee Hersilia Mimosa Fabaceae Poliploidia Taxonomía Morfología Vegetal Zona Subtropical América del Sur Polyploidy Taxonomy Plant Morphology Subtropical Zones South America Mimosa subseries Dolentes Barneby and Brevipedes Barneby are ecologically and morphologically high-diversified infrageneric taxa of this genus in southern South America. We performed a cytogenetical and morphological analysis of both subseries. Chromosome numbers from accessions throughout the area of distribution were studied. The chromosome numbers 2n = 8x = 104 for M. dolens subsp. callosa (Benth.) Barneby, M. dolens subsp. acerba varieties acerba (Benth.) Barneby, latifolia (Benth.) Barneby and rudis (Benth.) Barneby, M. dolens subsp. rigida var. rigescens (Benth.) Barneby, var. anisitsii (Lindm.) Barneby and var. foliolosa (Benth.) Barneby; and 2n = 4x = 52 for M. sceptrum Barneby, M. aff. custodis Barneby and M. dolens var. pangloea Barneby are presented for the first time. Their karyotypes were symmetric, with small chromosomes. There were several areas with taxa growing in sympatry, occasionally with intermediate forms. No diploids were found, which suggests the presence of either a declining polyploid complex or ancient polyploidy in the clade of southernmost representatives of M. series Mimosa, the most derived of the genus. Some vegetative, inflorescence and carpological characters seem to be associated with chromosome duplication. The distribution pattern of the cytotypes suggests events of chromosome duplication in centres of diversity and expansion of octoploids to the southernmost areas of distribution. Our findings support the importance of polyploidy in the morphological diversity, distribution and speciation of this complex. Instituto de Recursos Biológicos Fil: Morales, Matias. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Morón. Facultad de Agronomía y Ciencias Agroalimentarias; Argentina Fil: Fradkin, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Lomas de Zamora. Facultad de Ciencias Agrarias. Cátedra de Mejoramiento Genético; Argentina Fil: Bessega, Cecilia Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Poggio, Lidia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Fortunato, Renee Hersilia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Morón. Facultad de Agronomía y Ciencias Agroalimentarias; Argentina 2019-07-18T17:04:33Z 2019-07-18T17:04:33Z 2018 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://bioone.org/journals/Australian-Systematic-Botany/volume-31/issue-2/SB16033/Cytogeography-and-morphological-characterisation-of-a-taxonomic-polyploid-complex-of/10.1071/SB16033.short http://hdl.handle.net/20.500.12123/5530 1030-1887 1446-5701 https://doi.org/10.1071/SB16033 eng info:eu-repo/semantics/restrictedAccess application/pdf CSIRO Publishing Australian Systematic Botany 31 (2) : 190-208. (2018) |
| spellingShingle | Mimosa Fabaceae Poliploidia Taxonomía Morfología Vegetal Zona Subtropical América del Sur Polyploidy Taxonomy Plant Morphology Subtropical Zones South America Morales, Matias Fradkin, Eduardo Bessega, Cecilia Fabiana Poggio, Lidia Fortunato, Renee Hersilia Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title | Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title_full | Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title_fullStr | Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title_full_unstemmed | Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title_short | Cytogeography and morphological characterisation of a taxonomic, polyploid complex of Mimosa (Leguminosae) from subtropical South America |
| title_sort | cytogeography and morphological characterisation of a taxonomic polyploid complex of mimosa leguminosae from subtropical south america |
| topic | Mimosa Fabaceae Poliploidia Taxonomía Morfología Vegetal Zona Subtropical América del Sur Polyploidy Taxonomy Plant Morphology Subtropical Zones South America |
| url | https://bioone.org/journals/Australian-Systematic-Botany/volume-31/issue-2/SB16033/Cytogeography-and-morphological-characterisation-of-a-taxonomic-polyploid-complex-of/10.1071/SB16033.short http://hdl.handle.net/20.500.12123/5530 https://doi.org/10.1071/SB16033 |
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