Genetic diversity in two variants of Orobanche gracilis Sm. [var. gracilis and var. deludens (Beck) A. Pujadas] (Orobanchaceae) from different regions of Spain
Autor
Román, Belén
Hernández, Rosabell
Pujadas-Salvá, Antonio J.
Cubero Salmerón, José Ignacio
Rubiales, Diego
Satovic, Zlatko
Editor
Pontificia Universidad Javeriana (Bogotá)Fecha
2007Materia
AMOVAOrobanche gracilis
Molecular markers
Population genetics
Parasitic plants
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The pattern of genetic variation among populations of
two Orobanche gracilis Sm. taxa (var. gracilis and var.
deludens (Beck) A. Pujadas) from Northern and Southern Spain growing on different hosts was analysed
using RAPD markers. The diversity analysis within
populations revealed a higher level of diversity in the populations from the North when compared to the
Southern ones. The results of principal co-ordinate
analysis (PCoA) based on Dice distances among samples
clearly established the separation of samples according
to the taxonomical variety and the geographical origin
of each population. The Southern populations of both
var. gracilis and var. deludens were more differentiated
among them than those of var. gracilis from the North.
The analysis of molecular variance (AMOVA) indicated
that the lowest level of population differentiation was
found in O. gracilis var. gracilis from the North,
whereas in the case of O. gracilis var. deludens from the
South most of the genetic diversity was attributable to
differences among populations. Possible explanations
for the distribution of variation in these populations are
discussed