Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences
In this work, chromosome numbers and karyotype parameters of 36 taxa of the genus Mimosa were studied, especially from the southern South America center of diversification. Results support that x = 13 is the basic chromosome number in the genus. Polyploidy is very frequent, ca. 56 % of the total of...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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2018
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| Online Access: | https://link.springer.com/article/10.1007/s00606-013-0920-9 http://hdl.handle.net/20.500.12123/3481 https://doi.org/10.1007/s00606-013-0920-9 |
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| author | Morales, Matias Wulff, Arturo Federico Fortunato, Renee Hersilia Poggio, Lidia |
| author_browse | Fortunato, Renee Hersilia Morales, Matias Poggio, Lidia Wulff, Arturo Federico |
| author_facet | Morales, Matias Wulff, Arturo Federico Fortunato, Renee Hersilia Poggio, Lidia |
| author_sort | Morales, Matias |
| collection | INTA Digital |
| description | In this work, chromosome numbers and karyotype parameters of 36 taxa of the genus Mimosa were studied, especially from the southern South America center of diversification. Results support that x = 13 is the basic chromosome number in the genus. Polyploidy is very frequent, ca. 56 % of the total of the studied species here are polyploid, confirming that polyploids are more frequent at higher latitudes. The most common ploidy levels found are 2x and 4x, but some species studied exhibit 6x and 8x. In different groups, several ploidy levels were found. Parameters of chromosome size show statistically significant differences between close species, and asymmetry index A 2 exhibited low variation between them. It is possible to infer variations of chromosome size between diploids and tetraploids and between basal and derived taxa. The present studies confirm or reveal polyploidy in several groups of South America which are highly diversified in the southernmost area of distribution of the genus, such as sect. Batocaulon ser. Stipellares and sect. Calothamnos. Our data are discussed in a taxonomic context, making inferences about the origin of some polyploid taxa. Polyploidy could be an important phenomenon that increases the morphologic diversity and specific richness in southern South America. On basis of our data, it is possible to hypothesize hybridization between same-ploidy level or different ploidy level taxa. As already shown in the literature, our results confirm the importance of the polyploidy in the speciation of the genus. |
| format | info:ar-repo/semantics/artículo |
| id | INTA3481 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA34812018-09-26T15:41:27Z Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences Morales, Matias Wulff, Arturo Federico Fortunato, Renee Hersilia Poggio, Lidia Cromosomas Mimosa Fabaceae Hibridación Poliploidia Chromosomes Hybridization Polyploidy In this work, chromosome numbers and karyotype parameters of 36 taxa of the genus Mimosa were studied, especially from the southern South America center of diversification. Results support that x = 13 is the basic chromosome number in the genus. Polyploidy is very frequent, ca. 56 % of the total of the studied species here are polyploid, confirming that polyploids are more frequent at higher latitudes. The most common ploidy levels found are 2x and 4x, but some species studied exhibit 6x and 8x. In different groups, several ploidy levels were found. Parameters of chromosome size show statistically significant differences between close species, and asymmetry index A 2 exhibited low variation between them. It is possible to infer variations of chromosome size between diploids and tetraploids and between basal and derived taxa. The present studies confirm or reveal polyploidy in several groups of South America which are highly diversified in the southernmost area of distribution of the genus, such as sect. Batocaulon ser. Stipellares and sect. Calothamnos. Our data are discussed in a taxonomic context, making inferences about the origin of some polyploid taxa. Polyploidy could be an important phenomenon that increases the morphologic diversity and specific richness in southern South America. On basis of our data, it is possible to hypothesize hybridization between same-ploidy level or different ploidy level taxa. As already shown in the literature, our results confirm the importance of the polyploidy in the speciation of the genus. Instituto de Recursos Biológicos Fil: Morales, Matias. Universidad de Moron. Facultad de Agronomia y Ciencias Agroalimentarias; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biologicos; Argentina. Fil: Wulff, Arturo Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Fortunato, Renee Hersilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina. Universidad de Morón. Facultad de Agronomía y Ciencias Agroalimentarias; Argentina Fil: Poggio, Lidia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2018-09-26T15:39:57Z 2018-09-26T15:39:57Z 2014-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://link.springer.com/article/10.1007/s00606-013-0920-9 http://hdl.handle.net/20.500.12123/3481 0378-2697 1615-6110 https://doi.org/10.1007/s00606-013-0920-9 eng info:eu-repo/semantics/restrictedAccess application/pdf Plant Systematics and Evolution 300 (5) : 803–817 (May 2014) |
| spellingShingle | Cromosomas Mimosa Fabaceae Hibridación Poliploidia Chromosomes Hybridization Polyploidy Morales, Matias Wulff, Arturo Federico Fortunato, Renee Hersilia Poggio, Lidia Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title | Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title_full | Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title_fullStr | Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title_full_unstemmed | Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title_short | Chromosome studies in southern species of Mimosa (Fabaceae, Mimosoideae) and their taxonomic and evolutionary inferences |
| title_sort | chromosome studies in southern species of mimosa fabaceae mimosoideae and their taxonomic and evolutionary inferences |
| topic | Cromosomas Mimosa Fabaceae Hibridación Poliploidia Chromosomes Hybridization Polyploidy |
| url | https://link.springer.com/article/10.1007/s00606-013-0920-9 http://hdl.handle.net/20.500.12123/3481 https://doi.org/10.1007/s00606-013-0920-9 |
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