Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits
Anadenanthera colubrina var. cebil is the paradigmatic tree species of the Seasonally Dry Tropical Forest (SDTF) of central South America. The southernmost part of its range is divided into two disjunct nuclei: Misiones (Mi) and the Sub-Andean Piedmont (SAP), separated by some 800 km and with contra...
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| Format: | Artículo |
| Language: | Inglés |
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Oxford University Press
2025
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| Online Access: | http://hdl.handle.net/20.500.12123/23468 https://academic.oup.com/botlinnean/advance-article-abstract/doi/10.1093/botlinnean/boaf045/8196431 https://doi.org/10.1093/botlinnean/boaf045 |
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| author | Bruera, Camila Rocío García, María Victoria Pastorino, Mario Juan |
| author_browse | Bruera, Camila Rocío García, María Victoria Pastorino, Mario Juan |
| author_facet | Bruera, Camila Rocío García, María Victoria Pastorino, Mario Juan |
| author_sort | Bruera, Camila Rocío |
| collection | INTA Digital |
| description | Anadenanthera colubrina var. cebil is the paradigmatic tree species of the Seasonally Dry Tropical Forest (SDTF) of central South America. The southernmost part of its range is divided into two disjunct nuclei: Misiones (Mi) and the Sub-Andean Piedmont (SAP), separated by some 800 km and with contrasting environmental conditions. This disjunct distribution provides a suitable experimental scenario to evaluate possible adaptive changes. We sampled 262 individuals of the species from 26 natural populations from both nuclei and two rare ones from the Humid Chaco. Fresh leaves and ripe fruits were collected from each tree, on which 13 foliar and seven reproductive morphological traits were measured. Differences between regions and variability between and within populations were analysed using a linear mixed factorial model. To determine the possible relationship between phenotypic variability of morphological traits and ecological environmental variables, a redundancy analysis (RDA) was performed considering climate data from the CHELSA database, the enhanced vegetation index, and main soil depth. The three regions differed in half of the traits studied, with the greatest contrast between SAP and Mi, while the Humid Chaco was most similar to the latter. Variability between and within populations was found in almost all traits studied, indicating possible adaptive effects in the past and the potential occurrence of adaptations in the future. The ‘tree’ factor showed greater variability than the ‘population’ factor for almost all traits and even explained more of the variance than the residuals of the model. The RDA showed a clear separation between SAP and Mi populations and identified isothermality, mean temperature of the driest quarter, seasonality of precipitation, and precipitation of the warmest quarter as associated with the variability of the traits considered. These results are evidence of adaptation and also of a common gene pool due to a shared evolutionary history of both SDTF nuclei. Genetic studies using molecular markers and common garden trials should be carried out to gain more reliable conclusions. |
| format | Artículo |
| id | INTA23468 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| record_format | dspace |
| spelling | INTA234682025-08-19T12:45:59Z Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits Bruera, Camila Rocío García, María Victoria Pastorino, Mario Juan Árboles Medio Ambiente Morfología Vegetal Análisis de Redundancia Bosques Trees Environment Plant Morphology Redundancy Analysis Forests Anadenanthera colubrina var. cebil Anadenanthera colubrina var. cebil is the paradigmatic tree species of the Seasonally Dry Tropical Forest (SDTF) of central South America. The southernmost part of its range is divided into two disjunct nuclei: Misiones (Mi) and the Sub-Andean Piedmont (SAP), separated by some 800 km and with contrasting environmental conditions. This disjunct distribution provides a suitable experimental scenario to evaluate possible adaptive changes. We sampled 262 individuals of the species from 26 natural populations from both nuclei and two rare ones from the Humid Chaco. Fresh leaves and ripe fruits were collected from each tree, on which 13 foliar and seven reproductive morphological traits were measured. Differences between regions and variability between and within populations were analysed using a linear mixed factorial model. To determine the possible relationship between phenotypic variability of morphological traits and ecological environmental variables, a redundancy analysis (RDA) was performed considering climate data from the CHELSA database, the enhanced vegetation index, and main soil depth. The three regions differed in half of the traits studied, with the greatest contrast between SAP and Mi, while the Humid Chaco was most similar to the latter. Variability between and within populations was found in almost all traits studied, indicating possible adaptive effects in the past and the potential occurrence of adaptations in the future. The ‘tree’ factor showed greater variability than the ‘population’ factor for almost all traits and even explained more of the variance than the residuals of the model. The RDA showed a clear separation between SAP and Mi populations and identified isothermality, mean temperature of the driest quarter, seasonality of precipitation, and precipitation of the warmest quarter as associated with the variability of the traits considered. These results are evidence of adaptation and also of a common gene pool due to a shared evolutionary history of both SDTF nuclei. Genetic studies using molecular markers and common garden trials should be carried out to gain more reliable conclusions. EEA Bariloche Fil: Bruera, Camila Rocío. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentina Fil: Bruera, Camila Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina Fil: Bruera, Camila Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: García, María Victoria. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentina Fil: García, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical; Argentina Fil: García, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: García, María Victoria. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales. Departamento de Genética. Laboratorio de Genética de Poblaciones y del Paisaje; Argentina Fil: Pastorino, Mario Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Pastorino, Mario Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina 2025-08-19T12:41:34Z 2025-08-19T12:41:34Z 2025-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/23468 https://academic.oup.com/botlinnean/advance-article-abstract/doi/10.1093/botlinnean/boaf045/8196431 0024-4074 1095-8339 https://doi.org/10.1093/botlinnean/boaf045 eng info:eu-repo/semantics/restrictedAccess 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 Oxford University Press Botanical Journal of the Linnean Society : 1-13 (July 2025) |
| spellingShingle | Árboles Medio Ambiente Morfología Vegetal Análisis de Redundancia Bosques Trees Environment Plant Morphology Redundancy Analysis Forests Anadenanthera colubrina var. cebil Bruera, Camila Rocío García, María Victoria Pastorino, Mario Juan Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title | Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title_full | Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title_fullStr | Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title_full_unstemmed | Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title_short | Does disjunct mean differentiated? Variability analysis of disjunct populations of the neotropical tree Anadenanthera colubrina var. cebil in phenotypic traits |
| title_sort | does disjunct mean differentiated variability analysis of disjunct populations of the neotropical tree anadenanthera colubrina var cebil in phenotypic traits |
| topic | Árboles Medio Ambiente Morfología Vegetal Análisis de Redundancia Bosques Trees Environment Plant Morphology Redundancy Analysis Forests Anadenanthera colubrina var. cebil |
| url | http://hdl.handle.net/20.500.12123/23468 https://academic.oup.com/botlinnean/advance-article-abstract/doi/10.1093/botlinnean/boaf045/8196431 https://doi.org/10.1093/botlinnean/boaf045 |
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