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Abstract:

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.

Registro:

Documento: Artículo
Título:Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters
Autor:Bessega, C.; Pometti, C.L.; Ewens, M.; Saidman, B.O.; Vilardi, J.C.
Filiación:Laboratorio de Genética, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Estación Experimental Fernández, Departamento de Robles, Santiago del Estero, Argentina
Palabras clave:Conservation; Microsatellites; Native forest; Pollen dispersal; Fabaceae; Prosopis; Prosopis alba
Año:2012
Volumen:8
Número:2
Página de inicio:277
Página de fin:288
DOI: http://dx.doi.org/10.1007/s11295-011-0439-6
Título revista:Tree Genetics and Genomes
Título revista abreviado:Tree Genet. Genomes
ISSN:16142942
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16142942_v8_n2_p277_Bessega

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Citas:

---------- APA ----------
Bessega, C., Pometti, C.L., Ewens, M., Saidman, B.O. & Vilardi, J.C. (2012) . Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters. Tree Genetics and Genomes, 8(2), 277-288.
http://dx.doi.org/10.1007/s11295-011-0439-6
---------- CHICAGO ----------
Bessega, C., Pometti, C.L., Ewens, M., Saidman, B.O., Vilardi, J.C. "Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters" . Tree Genetics and Genomes 8, no. 2 (2012) : 277-288.
http://dx.doi.org/10.1007/s11295-011-0439-6
---------- MLA ----------
Bessega, C., Pometti, C.L., Ewens, M., Saidman, B.O., Vilardi, J.C. "Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters" . Tree Genetics and Genomes, vol. 8, no. 2, 2012, pp. 277-288.
http://dx.doi.org/10.1007/s11295-011-0439-6
---------- VANCOUVER ----------
Bessega, C., Pometti, C.L., Ewens, M., Saidman, B.O., Vilardi, J.C. Strategies for conservation for disturbed Prosopis alba (Leguminosae, Mimosoidae) forests based on mating system and pollen dispersal parameters. Tree Genet. Genomes. 2012;8(2):277-288.
http://dx.doi.org/10.1007/s11295-011-0439-6