This paper illustrates the phylogeographical structure of Saxifraga callosa in order to describe its genetic richness in refugial areas and to reconstruct its glacial history. S. callosa is a species spread throughout south-east France and Italy with a high distribution in the Maritime Alps. Four chloroplast microsatellite and AFLP markers were analyzed in populations of S. callosa. The size variants of all tested loci amount to 11 different haplotypes. Intrapopulational haplotype variation was found in two of the populations analyzed: on the Mt. Toraggio in the Maritime Alps, and in the Apuan Alps. On the other hand, no intrapopulational variation was found in 25 populations,most of which were sampled from isolated areas. Analysis of the haplotype distribution showed that population subdivision across all populations was high (GST = 0.899). Moreover, its genetic structure was studied using AMOVA and STRUCTURE analysis. The study legitimated inferred conclusions about the phylogeographical structure of the species and identified centers of diversity. Considerations concerning genetic structure and divergence among three major clades (Maritime Alps, Apuan Alps and Apennines), the patchy distribution of haplotypes, and the high number of private haplotypes support the proposal that S. callosa survived in some refugia within the Italian Peninsula refugium, and that mainly northern populations of refugia were involved in postglacial recolonization.

Grassi, F., Minuto, L., Casazza, G., Labra, M., & Sala, F. (2009). Haplotype richness in refugial areas: phylogeographical structure of Saxifraga callosa. JOURNAL OF PLANT RESEARCH, 122(4), 377-387 [10.1007/s10265-009-0230-z].

Haplotype richness in refugial areas: phylogeographical structure of Saxifraga callosa

Grassi, F;LABRA, MASSIMO;
2009

Abstract

This paper illustrates the phylogeographical structure of Saxifraga callosa in order to describe its genetic richness in refugial areas and to reconstruct its glacial history. S. callosa is a species spread throughout south-east France and Italy with a high distribution in the Maritime Alps. Four chloroplast microsatellite and AFLP markers were analyzed in populations of S. callosa. The size variants of all tested loci amount to 11 different haplotypes. Intrapopulational haplotype variation was found in two of the populations analyzed: on the Mt. Toraggio in the Maritime Alps, and in the Apuan Alps. On the other hand, no intrapopulational variation was found in 25 populations,most of which were sampled from isolated areas. Analysis of the haplotype distribution showed that population subdivision across all populations was high (GST = 0.899). Moreover, its genetic structure was studied using AMOVA and STRUCTURE analysis. The study legitimated inferred conclusions about the phylogeographical structure of the species and identified centers of diversity. Considerations concerning genetic structure and divergence among three major clades (Maritime Alps, Apuan Alps and Apennines), the patchy distribution of haplotypes, and the high number of private haplotypes support the proposal that S. callosa survived in some refugia within the Italian Peninsula refugium, and that mainly northern populations of refugia were involved in postglacial recolonization.
Articolo in rivista - Articolo scientifico
Scientifica
Apuan Alps Chloroplast Glacial refugia Maritime Alps Quaternary Refugia within refugia
English
377
387
Grassi, F., Minuto, L., Casazza, G., Labra, M., & Sala, F. (2009). Haplotype richness in refugial areas: phylogeographical structure of Saxifraga callosa. JOURNAL OF PLANT RESEARCH, 122(4), 377-387 [10.1007/s10265-009-0230-z].
Grassi, F; Minuto, L; Casazza, G; Labra, M; Sala, F
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/8077
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