Population structure of an endangered species living in contrasted habitats: Parnassia palustris (Saxifragaceae).
In endangered species, it is critical to analyse the level at which populations interact (i.e. dispersal) as well as the levels of inbreeding and local adaptation to set up conservation policies. These parameters were investigated in the endangered species Parnassia palustris living in contrasted habitats. We analysed population structure in 14 populations of northern France for isozymes, cpDNA markers and phenotypic traits related to fitness. Within population genetic diversity and inbreeding coefficients were not correlated to population size. Populations seem not to have undergone severe recent bottleneck. Conversely to pollen migration, seed migration seems limited at a regional scale, which could prevent colonization of new sites even if suitable habitats appear. Finally, the habitat type affects neither within-population genetic diversity nor genetic and phenotypic differentiation among populations. Thus, even if unnoticed local adaptation to habitats exists, it does not influence gene flow between populations.
Bonnin
Isabelle
I
UPRESA-CNRS 8016, Bâtiment SN2, Université de Lille 1, F-59655 Villeneuve d'Ascq cedex, France. bonnin@moulon.inra.fr
Colas
Bruno
B
Bacles
Cécile
C
Holl
Anne-Catherine
AC
Hendoux
Frédéric
F
Destiné
Benoit
B
Viard
Frédérique
F
D018742:DNA, Chloroplast / Q000032:analysis; D017753:Ecosystem; D005602:France; D005787:Gene Frequency; D017343:Genes, Plant; D014644:Genetic Variation; D005828:Genetics, Population; D007178:Inbreeding; D007527:Isoenzymes / Q000032:analysis; D010641:Phenotype; D010940:Plant Proteins / Q000032:analysis; D011110:Polymorphism, Genetic; D031995:Saxifragaceae / Q000235:genetics* / Q000502:physiology
D018742:DNA, Chloroplast; D007527:Isoenzymes; D010940:Plant Proteins