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Chloroplast DNA haplotype variation and population differentiation in Sorbus aucuparia L. (Rosaceae: Maloideae).

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Raspé, Olivier [UCL] Saumitou-Laprade, Pierre Cuguen, Joël Jacquemart, Anne-Laure [UCL]

Intra-specific chloroplast DNA (cpDNA) variation was studied in Sorbus aucuparia L., an entomophilous, mid-or early successional tree producing fleshy fruits. Eight PCR-amplified fragments of the chloroplast genome were screened for restriction fragment length polymorphisms, using one or two 4 bp-cutter restriction endonucleases. cpDNA variation was investigated on two geographical scales: (1) among four regions in France and Belgium; and (2) within the Belgian region. A total of 150 individuals from six populations were analysed. Fourteen polymorphisms were detected in six of the cpDNA fragments. All polymorphisms probably resulted from insertions or deletions, and allowed the identification of 12 haplotypes. The level of genetic differentiation computed on the basis of haplotype frequencies was similar on the two geographical scales considered (G(STc) = 0.286 among regions, G(STc) = 0.259 among populations within the Belgian region). These values are much lower than those obtained in nine previously studied temperate tree species, which are all wind-pollinated, late-successional species producing dry fruits. These results might primarily be accounted for by the contrasting life history traits of S. aucuparia. In order to obtain insights into the relative contribution of pollen and seeds to gene flow, G(STc) was also compared with previously obtained G(ST) estimates based on allozyme data.

Document type Article de périodique (Journal article) – Comparative Study, Journal Article, Research Support, Non-U.S. Gov't
Access type Accès libre
Publication date 2000
Journal information "Molecular Ecology" - Vol. 9, no. 8, p. 1113-22 (2000)
Peer reviewed yes
issn 0962-1083
Publication status Publié
Affiliation UCL - Autre
MESH Subject Belgium ; DNA, Chloroplast - genetics ; Ecology ; France ; Haplotypes ; Pollen ; Polymerase Chain Reaction ; Polymorphism, Restriction Fragment Length ; Rosales - genetics ; Seeds ; Variation (Genetics)
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Bibliographic reference Raspé, Olivier ; Saumitou-Laprade, Pierre ; Cuguen, Joël ; Jacquemart, Anne-Laure. Chloroplast DNA haplotype variation and population differentiation in Sorbus aucuparia L. (Rosaceae: Maloideae).. In: Molecular Ecology, Vol. 9, no. 8, p. 1113-22 (2000)
Permanent URL http://hdl.handle.net/2078.1/8619