Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis
Habitat fragmentation might significantly affect mating and pollen dispersal patterns in plant populations, contributing to the decline of remnant populations. However, wind-pollinated species are able to disperse pollen at longer distances after opening of the canopy. Our objectives were to charact...
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| Format: | Artículo |
| Language: | Inglés |
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Springer
2018
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| Online Access: | http://hdl.handle.net/20.500.12123/4062 https://doi.org/10.1007/s11295-014-0775-4 |
| _version_ | 1855483357449682944 |
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| author | Colabella, Fernando Gallo, Leonardo Ariel Moreno, Angela Carolina Marchelli, Paula |
| author_browse | Colabella, Fernando Gallo, Leonardo Ariel Marchelli, Paula Moreno, Angela Carolina |
| author_facet | Colabella, Fernando Gallo, Leonardo Ariel Moreno, Angela Carolina Marchelli, Paula |
| author_sort | Colabella, Fernando |
| collection | INTA Digital |
| description | Habitat fragmentation might significantly affect mating and pollen dispersal patterns in plant populations, contributing to the decline of remnant populations. However, wind-pollinated species are able to disperse pollen at longer distances after opening of the canopy. Our objectives were to characterize the mating system parameters and to estimate the average distance of effective pollen dispersal in the wind-pollinated conifer Austrocedrus chilensis. We sampled 19 “mother trees,” 200 progeny, and 81 additional adults (both male and female), in a fragmented population at the Argentinean Patagonian steppe. We registered the spatial positions of individuals and genotyped all samples with five microsatellite markers. We found a high genetic diversity, a moderated rate of biparental inbreeding (t m − t s = 0.105), and a complete absence of correlated paternity (r p = −0.015). The effective number of pollen donors contributing to a single mother (N ep) was 13.9. Applying TWOGENER, we estimated a low but significant differentiation among the inferred pollen pools (ΦFT = 0.036, p = 0.001) and a very large average pollen dispersal distance (d = 1,032.3 m). The leptokurtic distribution (b = 0.18) presumes a potential for even larger dispersal distances. The high genetic diversity, the mating patterns, and the extensive pollen dispersal presume that habitat fragmentation did not have a negative impact on pollen movement in this population of A. chilensis. Genetic connectivity among fragmented populations scattered in the Patagonian region is possible, and we stress the need of management policies at the landscape level. |
| format | Artículo |
| id | INTA4062 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | INTA40622021-07-23T16:20:17Z Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis Colabella, Fernando Gallo, Leonardo Ariel Moreno, Angela Carolina Marchelli, Paula Austrocedrus Polen Flujo Genético Población Vegetal Pollen Gene Flow Plant Population Austrocedrus chilensis Cipres de la Patagonia Habitat fragmentation might significantly affect mating and pollen dispersal patterns in plant populations, contributing to the decline of remnant populations. However, wind-pollinated species are able to disperse pollen at longer distances after opening of the canopy. Our objectives were to characterize the mating system parameters and to estimate the average distance of effective pollen dispersal in the wind-pollinated conifer Austrocedrus chilensis. We sampled 19 “mother trees,” 200 progeny, and 81 additional adults (both male and female), in a fragmented population at the Argentinean Patagonian steppe. We registered the spatial positions of individuals and genotyped all samples with five microsatellite markers. We found a high genetic diversity, a moderated rate of biparental inbreeding (t m − t s = 0.105), and a complete absence of correlated paternity (r p = −0.015). The effective number of pollen donors contributing to a single mother (N ep) was 13.9. Applying TWOGENER, we estimated a low but significant differentiation among the inferred pollen pools (ΦFT = 0.036, p = 0.001) and a very large average pollen dispersal distance (d = 1,032.3 m). The leptokurtic distribution (b = 0.18) presumes a potential for even larger dispersal distances. The high genetic diversity, the mating patterns, and the extensive pollen dispersal presume that habitat fragmentation did not have a negative impact on pollen movement in this population of A. chilensis. Genetic connectivity among fragmented populations scattered in the Patagonian region is possible, and we stress the need of management policies at the landscape level. EEA Bariloche Fil: Colabella, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Moreno, Angela Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Marchelli, Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2018-12-12T13:57:42Z 2018-12-12T13:57:42Z 2014-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/4062 1614-2942 1614-2950 https://doi.org/10.1007/s11295-014-0775-4 eng info:eu-repo/semantics/reference/hdl/20.500.12123/9878 info:eu-repo/semantics/restrictedAccess application/pdf Springer Tree genetics & genomes 10 (6) : 1519–1529. (December 2014) |
| spellingShingle | Austrocedrus Polen Flujo Genético Población Vegetal Pollen Gene Flow Plant Population Austrocedrus chilensis Cipres de la Patagonia Colabella, Fernando Gallo, Leonardo Ariel Moreno, Angela Carolina Marchelli, Paula Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title | Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title_full | Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title_fullStr | Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title_full_unstemmed | Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title_short | Extensive pollen flow in a natural fragmented population of Patagonian cypress Austrocedrus chilensis |
| title_sort | extensive pollen flow in a natural fragmented population of patagonian cypress austrocedrus chilensis |
| topic | Austrocedrus Polen Flujo Genético Población Vegetal Pollen Gene Flow Plant Population Austrocedrus chilensis Cipres de la Patagonia |
| url | http://hdl.handle.net/20.500.12123/4062 https://doi.org/10.1007/s11295-014-0775-4 |
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