The distribution of haplotypic diversity of 17 Tilia cordata Mill. populations was investigated by PCRRFLP markers of the chloroplast genomes. A high number of haplotypes (14) and high total genetic diversity (hT = 0.881) were detected. The distribution of the chloroplast DNA haplotypes revealed low geographic structure of the genetic diversity; the coefficient of differentiation between populations, Gst = 0.552, was lower than the mean value reported for maternally inherited markers in Angiosperm tree species. The value of population subdivision for ordered alleles, as measured by Nst, was significantly higher than the value of population subdivision for unordered alleles (Nst = 0.662, Gst = 0.552), thus indicating the presence of a phylogeographic structure. The relatively low genetic differentiation among T. cordata populations may be explained mainly as a consequence of human impact on this species.
Chloroplast DNA variation of Tilia cordata Mill
Fineschi S;Vendramin GG
2003
Abstract
The distribution of haplotypic diversity of 17 Tilia cordata Mill. populations was investigated by PCRRFLP markers of the chloroplast genomes. A high number of haplotypes (14) and high total genetic diversity (hT = 0.881) were detected. The distribution of the chloroplast DNA haplotypes revealed low geographic structure of the genetic diversity; the coefficient of differentiation between populations, Gst = 0.552, was lower than the mean value reported for maternally inherited markers in Angiosperm tree species. The value of population subdivision for ordered alleles, as measured by Nst, was significantly higher than the value of population subdivision for unordered alleles (Nst = 0.662, Gst = 0.552), thus indicating the presence of a phylogeographic structure. The relatively low genetic differentiation among T. cordata populations may be explained mainly as a consequence of human impact on this species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
