Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters
Prosopis species forests in Argentina are increasingly fragmented in the last years mainly by the deforestation activity without any reforestation strategy, the establishment of different crop plantations, and natural fires. The consequence of habitat fragmentation on the genetic potential of Prosop...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n2_p277_Bessega http://hdl.handle.net/20.500.12110/paper_16142942_v8_n2_p277_Bessega |
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paper:paper_16142942_v8_n2_p277_Bessega2023-06-08T16:25:19Z Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters Bessega, Cecilia Fabiana Pometti, Carolina Luciana Saidman, Beatriz Ofelia Vilardi, Juan Cesar Conservation Microsatellites Native forest Pollen dispersal Fabaceae Prosopis Prosopis alba Prosopis species forests in Argentina are increasingly fragmented in the last years mainly by the deforestation activity without any reforestation strategy, the establishment of different crop plantations, and natural fires. The consequence of habitat fragmentation on the genetic potential of Prosopis alba requires a fine-scale analysis of population structure, in particular mating system and pollen dispersal. By means of short sequences repeats, we analyzed a fragmented population of this species in Santiago del Estero (Argentina). Most genetic variation was observed among families within zones (65. 5%), whereas the lowest proportion corresponded to the differentiation among zones (2. 8%). The fine analysis of structure at family level suggests that this population is complete outcrosser and there is a low but significant biparental inbreeding. Outcrossing rates differ among mother plants and the proportion of full sibs within mother plants ranged from 64% for seeds proceeding from the same pod to 10% for seeds from different pods. The average pollen dispersal distance was estimated to be among 5. 36 and 30. 92 m by using the KinDist or TwoGener approach. About seven pollen donors are siring each progeny array and the number of seed trees necessary for seed collection aiming to retain an effective population size of 100 was estimated in 16-39 individuals depending on the relatedness estimator used. Pollen and seed dispersal would be limited, what determines the need of conserving short distant patches to avoid the effects of inbreeding and drift within populations as a consequence of intensive use resource for agriculture. © 2011 Springer-Verlag. Fil:Bessega, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pometti, C.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Saidman, B.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilardi, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n2_p277_Bessega http://hdl.handle.net/20.500.12110/paper_16142942_v8_n2_p277_Bessega |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Conservation Microsatellites Native forest Pollen dispersal Fabaceae Prosopis Prosopis alba |
| spellingShingle |
Conservation Microsatellites Native forest Pollen dispersal Fabaceae Prosopis Prosopis alba Bessega, Cecilia Fabiana Pometti, Carolina Luciana Saidman, Beatriz Ofelia Vilardi, Juan Cesar Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| topic_facet |
Conservation Microsatellites Native forest Pollen dispersal Fabaceae Prosopis Prosopis alba |
| description |
Prosopis species forests in Argentina are increasingly fragmented in the last years mainly by the deforestation activity without any reforestation strategy, the establishment of different crop plantations, and natural fires. The consequence of habitat fragmentation on the genetic potential of Prosopis alba requires a fine-scale analysis of population structure, in particular mating system and pollen dispersal. By means of short sequences repeats, we analyzed a fragmented population of this species in Santiago del Estero (Argentina). Most genetic variation was observed among families within zones (65. 5%), whereas the lowest proportion corresponded to the differentiation among zones (2. 8%). The fine analysis of structure at family level suggests that this population is complete outcrosser and there is a low but significant biparental inbreeding. Outcrossing rates differ among mother plants and the proportion of full sibs within mother plants ranged from 64% for seeds proceeding from the same pod to 10% for seeds from different pods. The average pollen dispersal distance was estimated to be among 5. 36 and 30. 92 m by using the KinDist or TwoGener approach. About seven pollen donors are siring each progeny array and the number of seed trees necessary for seed collection aiming to retain an effective population size of 100 was estimated in 16-39 individuals depending on the relatedness estimator used. Pollen and seed dispersal would be limited, what determines the need of conserving short distant patches to avoid the effects of inbreeding and drift within populations as a consequence of intensive use resource for agriculture. © 2011 Springer-Verlag. |
| author |
Bessega, Cecilia Fabiana Pometti, Carolina Luciana Saidman, Beatriz Ofelia Vilardi, Juan Cesar |
| author_facet |
Bessega, Cecilia Fabiana Pometti, Carolina Luciana Saidman, Beatriz Ofelia Vilardi, Juan Cesar |
| author_sort |
Bessega, Cecilia Fabiana |
| title |
Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| title_short |
Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| title_full |
Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| title_fullStr |
Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| title_full_unstemmed |
Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters |
| title_sort |
strategies for conservation for disturbed prosopis alba (leguminosae, mimosoidae) forests based on mating system and pollen dispersal parameters |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n2_p277_Bessega http://hdl.handle.net/20.500.12110/paper_16142942_v8_n2_p277_Bessega |
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